SIENTIAPDE-1005

Implement workflows for fake data generation, scouter processing, and core scouter operations

- Added `FakeData` workflow to generate random data and send it to a Kafka topic.
- Implemented `Scouter` workflow to load data from Kafka and trigger the core scouter workflow.
- Created `CoreScouter` workflow to process data through quality gates, aggregation, and export to PostgreSQL.
- Developed comprehensive unit tests for activities and workflows, ensuring proper functionality and error handling.
- Enhanced Redis and Postgres activities with robust testing for data handling and error notifications.
- Introduced quality filters for data validation and implemented tests to verify their functionality.

.env

@@ -0,0 +1,20 @@
+POSTGRES_HOST=postgres
+POSTGRES_PORT=5432
+POSTGRES_USER=sientia
+POSTGRES_PASSWORD=sientia
+POSTGRES_DB=sientia
+POSTGRES_MIN_CONNECTIONS=5
+POSTGRES_MAX_CONNECTIONS=20
+
+KAFKA_BOOTSTRAP_SERVERS=kafka:29092
+KAFKA_POLLING_TIME=1000
+
+REDIS_HOST=redis
+REDIS_PORT=6379
+
+TEMPORAL_HOST=host.docker.internal:7233
+TEMPORAL_NAMESPACE=default
+
+LOG_LEVEL=INFO
+
+PROJECT_NAME=scouter

Dockerfile

@@ -0,0 +1,31 @@
+# Use uma imagem base Python
+FROM python:3.11-slim
+
+# Instale git e outras dependências do sistema
+RUN apt-get update && apt-get install -y git \
+    && apt-get install -y build-essential python3-dev \
+    && apt-get install -y vim \
+    && rm -rf /var/lib/apt/lists/*
+
+# Defina o diretório de trabalho
+WORKDIR /app
+
+# Copie os arquivos do projeto
+COPY . /app
+
+RUN pip install --upgrade pip setuptools wheel
+
+# Install the required packages
+# Add github to known hosts
+# This is needed for SSH to work
+# The SSH key will NOT remain in the image
+# IMPORTANT: this block requires BuildKit
+# and the --ssh flag during docker build
+RUN --mount=type=ssh \
+    mkdir -p ~/.ssh && \
+    ssh-keyscan github.com >> ~/.ssh/known_hosts && \
+    pip install --no-cache-dir -r requirements.txt
+
+
+# Defina o comando para executar o worker
+CMD ["python", "-m", "scouter.worker.worker"]

client-schedule.py

@@ -0,0 +1,42 @@
+from temporalio.client import Client, Schedule, ScheduleActionStartWorkflow, ScheduleSpec, ScheduleIntervalSpec
+import asyncio
+from datetime import timedelta
+
+seconds = 5
+
+
+async def main():
+    # Conecta ao servidor Temporal
+    client = await Client.connect("http://localhost:7233")
+
+    for i in range(1, 2):
+        # Define o agendamento para rodar a cada 5 segundos
+        schedule = Schedule(
+            action=ScheduleActionStartWorkflow(
+                'fake_data',  # Nome da classe do workflow no worker.py
+                # Argumento de entrada (ajuste conforme seu workflow)
+                {
+                    'topic': 'fake_data'
+                },
+                # ID que você define aqui
+                id=f"test-{i}-{seconds}",
+                task_queue="fake_data-queue",  # Deve coincidir com o worker
+            ),
+            spec=ScheduleSpec(
+                intervals=[ScheduleIntervalSpec(
+                    every=timedelta(seconds=seconds))]
+            ),
+        )
+
+        # Cria ou atualiza o schedule no Temporal
+        # ID único para o schedule
+        schedule_id = f"test-schedule-c-{i}-every-o-{seconds}s"
+        try:
+            await client.create_schedule(schedule_id, schedule)
+            print(
+                f"Schedule '{schedule_id}' criado com sucesso. Workflow rodará a cada {seconds} segundos.")
+        except Exception as e:
+            print(f"Erro ao criar o schedule: {e}")
+
+if __name__ == "__main__":
+    asyncio.run(main())

docker-compose.yml

@@ -0,0 +1,98 @@
+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:15
+    container_name: postgres
+    environment:
+      POSTGRES_USER: sientia
+      POSTGRES_PASSWORD: sientia
+      POSTGRES_DB: sientia
+    ports:
+      - "5432:5432"
+    volumes:
+      - ./postgres_data:/var/lib/postgresql/data
+    networks:
+      - sientia-network
+
+  zookeeper:
+    image: confluentinc/cp-zookeeper:7.5.1
+    container_name: zookeeper
+    environment:
+      ZOOKEEPER_CLIENT_PORT: 2181
+      ZOOKEEPER_TICK_TIME: 2000
+    ports:
+      - "2181:2181"
+    networks:
+      - sientia-network
+
+  kafka:
+    image: confluentinc/cp-kafka:7.5.1
+    container_name: kafka
+    depends_on:
+      - zookeeper
+    ports:
+      - "9092:9092"
+      - "29092:29092"
+    environment:
+      KAFKA_BROKER_ID: 1
+      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
+      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092
+      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
+      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
+      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
+      # Message retention settings (5 minutes)
+      KAFKA_LOG_RETENTION_MINUTES: 5     # 5 minutes
+      KAFKA_LOG_RETENTION_MS: 300000     # 5 minutes in milliseconds
+      KAFKA_LOG_RETENTION_CHECK_INTERVAL_MS: 30000  # Check every 30 seconds
+    networks:
+      - sientia-network
+
+  kafka-ui:
+    image: provectuslabs/kafka-ui:latest
+    container_name: kafka-ui
+    ports:
+      - "8080:8080"
+    environment:
+      KAFKA_CLUSTERS_0_NAME: local
+      KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: kafka:29092
+    networks:
+      - sientia-network
+
+  redis:
+    image: redis:latest
+    ports:
+      - "${REDIS_PORT}:6379"
+    networks:
+      - sientia-network
+
+  redis-ui:
+    image: redislabs/redisinsight:latest
+    container_name: redis-ui
+    ports:
+      - "8001:8001"
+    networks:
+      - sientia-network
+    depends_on:
+      - redis
+
+  # scouter:
+  #   build: .
+  #   container_name: scouter
+  #   networks:
+  #     - sientia-network
+  #   env_file:
+  #     - .env
+  #   depends_on:
+  #     - postgres
+  #     - kafka
+  #     - redis
+
+
+networks:
+  sientia-network:
+    driver: bridge
+
+volumes:
+  postgres_data:
+    driver: local

input_sample.json

@@ -0,0 +1,45 @@
+{
+    "topic": "fake_data",
+    "workflow_name": "scouter-fake-pipeline",
+    "schedule_name": "scouter-fake-pipeline",
+    "model_name": "fake_model",
+    "model_id": 1,
+    "trigger_laborious": false,
+    "filters": {
+        "NULL_VALUES_FILTER": {
+            "policy": "KEEP"
+        },
+        "OUT_OF_BOUNDS_FILTER": {
+            "policy": "DISCARD"
+        }
+    },
+    "schema": "fake_schema",
+    "table_name": "fake_table",
+    "retention_time": 3600,
+    "model_tags": {
+        "Temperature Sensor": {
+            "data_range": [0, 50],
+            "aggr_function": "lts"
+        },
+        "Vibration Meter": {
+            "data_range": [0, 50],
+            "aggr_function": "mdn"
+        },
+        "Pressure Gauge": {
+            "data_range": [0, 100],
+            "aggr_function": "avg"
+        },
+        "Flow Meter": {
+            "data_range": [0, 100],
+            "aggr_function": "max"
+        },
+        "Voltage Sensor": {
+            "data_range": [0, 100],
+            "aggr_function": "min"
+        },
+        "Current Sensor": {
+            "data_range": [0, 100],
+            "aggr_function": "avg"
+        }
+    }
+}

requirements.txt

@@ -1,5 +1,7 @@
 temporalio
 psycopg2-binary
+sqlalchemy
 asyncua
+redis
 git+ssh://git@github.com/Aignosi/sientia-dataops-library.git
 git+ssh://git@github.com/Aignosi/sientia-mlops-library.git

scouter/activities/activities.py

@@ -0,0 +1,65 @@
+from temporalio import activity, workflow
+
+with workflow.unsafe.imports_passed_through():
+    from scouter.activities.postgres import Postgres
+    from scouter.activities.redis import Redis
+    from scouter.activities.kafka import Kafka
+    from scouter.activities.gates import Gates
+    from logging import Logger
+    from sientia_do.notifications.handlers import NotificationHandler
+    from typing import Any
+
+
+class Activities(Postgres, Redis, Kafka, Gates):
+    """Activities class that combines multiple services with proper initialization."""
+
+    def __init__(self,
+                 postgres_config: dict[str, Any],
+                 redis_config: dict[str, Any],
+                 kafka_config: dict[str, Any],
+                 logger: Logger,
+                 notification_handler: NotificationHandler):
+
+        # Initialize Postgres
+        Postgres.__init__(
+            self,
+            host=postgres_config['host'],
+            port=postgres_config['port'],
+            user=postgres_config['user'],
+            password=postgres_config['password'],
+            dbname=postgres_config['dbname'],
+            min_connections=postgres_config['min_connections'],
+            max_connections=postgres_config['max_connections'],
+            logger=logger,
+            notification_handler=notification_handler
+        )
+
+        # Initialize Redis
+        Redis.__init__(
+            self,
+            host=redis_config['host'],
+            port=redis_config['port'],
+            logger=logger,
+            notification_handler=notification_handler
+        )
+
+        # Initialize Kafka
+        Kafka.__init__(
+            self,
+            bootstrap_servers=kafka_config['bootstrap_servers'],
+            polling_time=kafka_config['polling_time'],
+            group_id=kafka_config['group_id'],
+            logger=logger,
+            notification_handler=notification_handler
+        )
+
+        # Initialize Gates
+        Gates.__init__(
+            self,
+            logger=logger,
+            notification_handler=notification_handler
+        )
+
+    @activity.defn(name="prepare_activity")
+    def prepare_activity(self, input_data: dict[str, Any]):
+        super().prepare_activity(input_data)

scouter/activities/faker.py

@@ -0,0 +1,80 @@
+import random
+from datetime import datetime, timezone
+from typing import Any
+import json
+from logging import Logger
+from kafka import KafkaProducer
+from temporalio import activity
+
+from sientia_do.notifications.handlers import NotificationHandler
+from scouter.activities.base import BaseActivity
+
+
+class Faker(BaseActivity):
+    def __init__(self, bootstrap_servers: str, logger: Logger,
+                 notification_handler: NotificationHandler):
+        self.producer = KafkaProducer(
+            bootstrap_servers=bootstrap_servers,
+            value_serializer=lambda v: json.dumps(v).encode('utf-8')
+        )
+
+        # Predefined lists for tag and name
+        self.tags = {
+            'ns=1;i=1001': 'Temperature Sensor',
+            'ns=1;i=1002': 'Vibration Meter',
+            'ns=1;i=1003': 'Pressure Gauge',
+            'ns=1;i=1004': 'Flow Meter',
+            'ns=1;i=1005': 'Voltage Sensor',
+            'ns=1;i=1006': 'Current Sensor'
+        }
+
+        BaseActivity.__init__(self, logger, notification_handler)
+
+    @activity.defn(name="generate_and_send_data")
+    async def generate_and_send_data(self, input_data: dict[str, Any]):
+        """
+        Generates random data and sends it to a Kafka topic.
+
+        Args:
+            input_data (dict[str, Any]): The input data containing:
+                topic (str): The Kafka topic to send data to
+                num_messages (int, optional): Number of messages to generate. 
+                Defaults to random.randint(1, len(self.tags)).
+
+        """
+        topic = input_data.get('topic')
+        num_messages = input_data.get(
+            'num_messages', random.randint(1, len(self.tags)))
+
+        if not topic:
+            raise ValueError("Topic must be specified in input_data")
+
+        self.logger.info(
+            f"Generating {num_messages} messages for topic {topic}")
+
+        for _ in range(num_messages):
+            # Select random tag and name
+            tag = random.choice(list(self.tags.keys()))
+            name = self.tags[tag]
+
+            # Generate random value between 0 and 100
+            if random.random() < 0.1:
+                value = None
+            else:
+                value = round(random.uniform(0, 100), 2)
+
+            # Create data dictionary
+            data = {
+                'tag': tag,
+                'name': name,
+                'timestamp': datetime.now(timezone.utc).strftime('%Y-%m-%d %H:%M:%S'),
+                'value': value
+            }
+
+            # Send to Kafka
+            self.producer.send(topic, value=data)
+
+        # Ensure all messages are sent
+        self.producer.flush()
+
+        self.logger.info("Success")

scouter/activities/gates.py

@@ -2,11 +2,11 @@ from temporalio import workflow, activity
 
 with workflow.unsafe.imports_passed_through():
     from sientia_do.notifications.models import NotificationLevel
-    from pandas import DataFrame
     from scouter.activities.base import BaseActivity
     from scouter.utils.quality.filters import null_values_filter, out_of_bounds_filter
     from typing import Any
     import traceback
+    from pandas import DataFrame
 
 quality_gate_filters = {
     'NULL_VALUES_FILTER': null_values_filter,
@@ -15,6 +15,133 @@ quality_gate_filters = {
 
 
 class Gates(BaseActivity):
+
+    def apply_aggregation(self, group: DataFrame, aggr_function: str) -> float | None | str:
+        """
+        Apply aggregation function to a group of data.
+
+        Args:
+            group (DataFrame): The group of data to apply the aggregation function to.
+            aggr_function (str): The aggregation function to apply.
+
+        Returns:
+            float | None | str: The result of the aggregation function.
+        """
+        if len(group) == 1:
+            return group['value'].item()
+
+        # Apply aggregation function to value
+        if aggr_function == 'lts':
+            return group['value'].iloc[-1]
+        else:
+            group.dropna(inplace=True, subset=['value'])
+
+            if group.empty:
+                return None
+
+            if aggr_function == 'avg':
+                return group['value'].mean()
+            elif aggr_function == 'mdn':
+                return group['value'].median()
+            elif aggr_function == 'max':
+                return group['value'].max()
+            elif aggr_function == 'min':
+                return group['value'].min()
+            else:
+                self.notification_handler.build_and_send_notification(
+                    notification_id="AGGREGATION_ISSUES",
+                    message=f"Invalid aggregation function: {aggr_function}",
+                    block="aggregate_data",
+                    level=NotificationLevel.ERROR,
+                    attachment_content=traceback.format_exc()
+                )
+                return 'continue'
+
+    @activity.defn(name="aggregate_data")
+    async def aggregate_data(self, input_data: dict[str, Any]) -> dict[str, Any]:
+        """
+        Aggregates time series data by tag and name, applying specified
+        aggregation functions and taking the latest timestamp.
+
+        Args:
+            input_data (dict[str, Any]): The data to aggregate. Contains:
+                data (dict[str, Any]): The time series data.
+                model_tags (dict[str, Any]): The tags configuration 
+                containing aggregation functions.
+
+        Returns:
+            dict[str, Any]: The aggregated data.
+        """
+
+        try:
+            # Convert input data to DataFrame
+            df = DataFrame(input_data['data'])
+
+            self.logger.debug(
+                f"Aggregating time series data: {df.to_string()}")
+
+            # Initialize result dictionary
+            result = {}
+
+            # Group by tag and name
+            grouped = df.groupby(['tag', 'name'])
+
+            for (tag, name), group in grouped:
+                # Get the aggregation function from model_tags
+                aggr_function = input_data['model_tags'].get(
+                    name, {}).get('aggr_function', 'lts')
+
+                group.sort_values(by='timestamp', inplace=True)
+
+                # Get the latest timestamp
+                latest_timestamp = group['timestamp'].max()
+
+                if group.empty:
+                    continue
+
+                aggr_value = self.apply_aggregation(group, aggr_function)
+
+                if aggr_value == 'continue':
+                    continue
+
+                self.logger.debug(
+                    f"Aggregated data: {aggr_value}")
+                self.logger.debug(
+                    f"Latest timestamp: {latest_timestamp}")
+                self.logger.debug(
+                    f"Groups: {group.to_string()}")
+                self.logger.debug(
+                    f"group name: {name}")
+                self.logger.debug(
+                    f"group tag: {tag}")
+
+                # Store the result
+                result[f"{tag}_{name}"] = {
+                    'tag': tag,
+                    'name': name,
+                    'value': aggr_value,
+                    'timestamp': latest_timestamp,
+                    'aggregation_function': aggr_function
+                }
+
+            result_df = DataFrame(list(result.values()))
+            self.logger.debug(f"Aggregated data:\n {result_df.to_string()}")
+            return result_df.to_dict()
+
+        except Exception as e:
+            trace = traceback.format_exc()
+
+            self.notification_handler.build_and_send_notification(
+                notification_id="AGGREGATION_ISSUES",
+                message=f"Error aggregating data: {e}",
+                block="aggregate_data",
+                level=NotificationLevel.ERROR,
+                attachment_content=trace
+            )
+
+            self.logger.error(trace)
+            raise
+
     @activity.defn(name="data_quality_gate")
     async def data_quality_gate(self, input_data: dict[str, Any]) -> dict[str, Any]:
         """
@@ -29,6 +156,8 @@ class Gates(BaseActivity):
                     filter_name: The name of the filter.
                     policy: The policy to apply. Can be "DISCARD" or "KEEP".
                 data (dict[str, Any]): The data to validate.
+                model_tags (dict[str, Any]): The tags of the model.
+                    And it's respective configuration.
 
         Returns:
             dict[str, Any]: The data validated.
@@ -36,6 +165,10 @@ class Gates(BaseActivity):
 
         filters = input_data['filters']
         data = DataFrame(input_data['data'])
+        model_tags = input_data['model_tags']
+
+        self.logger.debug(
+            f"Applying quality gate to data: {data.to_string()}")
 
         for filter_name, policy in filters.items():
             if filter_name not in quality_gate_filters:
@@ -43,17 +176,21 @@ class Gates(BaseActivity):
                 continue
 
             try:
-                filtered_data = quality_gate_filters[filter_name](data)
+                filtered_data = quality_gate_filters[filter_name](
+                    data, model_tags)
 
             except Exception as e:
+                trace = traceback.format_exc()
                 self.notification_handler.build_and_send_notification(
                     notification_id="DATA_QUALITY_GATE_ISSUES",
                     message=f"Error applying filter {filter_name}: {e}",
                     block="data_quality_gate",
                     level=NotificationLevel.ERROR,
-                    attachment_content=traceback.format_exc()
+                    attachment_content=trace
                 )
 
+                self.logger.error(trace)
+
             else:
                 if filtered_data.empty:
                     continue
@@ -62,7 +199,7 @@ class Gates(BaseActivity):
                 attachment = filtered_data.to_string()
 
                 self.notification_handler.build_and_send_notification(
-                    notification_id="DATA_QUALITY_GATE_ISSUES",
+                    notification_id=f"DATA_QUALITY_GATE_ISSUES__{filter_name}",
                     message=message,
                     block="data_quality_gate",
                     level=NotificationLevel.WARNING,
@@ -70,6 +207,8 @@ class Gates(BaseActivity):
                 )
 
                 if policy == "DISCARD":
-                    data = data[not data.isin(filtered_data).all(axis=1)]
+                    data = data[~data.index.isin(filtered_data.index)]
+
+        self.logger.debug("Data quality gate applied")
 
         return data.to_dict()

scouter/activities/kafka.py

@@ -7,6 +7,7 @@ with workflow.unsafe.imports_passed_through():
     from typing import Any
     from kafka import KafkaConsumer
     from pandas import DataFrame
+    import json
 
 
 class Kafka(BaseActivity):
@@ -19,13 +20,13 @@ class Kafka(BaseActivity):
             auto_offset_reset="earliest",
             enable_auto_commit=True,
             group_id=group_id,
-            value_deserializer=lambda x: x.decode("utf-8")
+            value_deserializer=lambda x: json.loads(x.decode("utf-8"))
         )
 
-        super().__init__(logger, notification_handler)
+        BaseActivity.__init__(self, logger, notification_handler)
 
     @activity.defn(name="load_from_kafka")
-    def load_from_kafka(self, input_data: dict[str, Any]) -> dict[str, Any]:
+    async def load_from_kafka(self, input_data: dict[str, Any]) -> dict[str, Any]:
         """
         Loads data from a kafka topic. Polls the topic for a given time and returns the data.
 
@@ -35,6 +36,9 @@ class Kafka(BaseActivity):
         Returns:
             dict[str, Any]: The data loaded from the topic.
         """
+
+        self.logger.debug(f"Loading data from topic: {input_data['topic']}")
+
         topic = input_data["topic"]
 
         # Subscribe to the specified topic
@@ -46,6 +50,8 @@ class Kafka(BaseActivity):
         # Poll for messages
         records = self.kafka_connector.poll(timeout_ms=self.polling_time)
 
+        self.logger.debug(f"Polled {len(records)} records from topic: {topic}")
+
         # Process the polled records
         for _topic_partition, msgs in records.items():
             for msg in msgs:
@@ -55,4 +61,10 @@ class Kafka(BaseActivity):
         if not message_values:
             return {}
 
+        self.logger.debug(
+            f"Loaded {len(message_values)} messages from topic: {topic}")
+
+        self.logger.debug(
+            f"Loaded data: {message_values}")
+
         return DataFrame(message_values).to_dict()

scouter/activities/postgres.py

@@ -2,7 +2,9 @@ import traceback
 from temporalio import workflow, activity
 
 with workflow.unsafe.imports_passed_through():
-    from psycopg2.pool import ThreadedConnectionPool
+    from sqlalchemy import create_engine
+    from sqlalchemy.orm import sessionmaker
+    from sqlalchemy.pool import QueuePool
     from pandas import DataFrame
     from logging import Logger
     from sientia_do.notifications.handlers import NotificationHandler
@@ -22,19 +24,20 @@ class Postgres(BaseActivity):
         self.password = password
         self.dbname = dbname
 
-        self.pool = ThreadedConnectionPool(
+        # Create SQLAlchemy engine with connection pooling
-            minconn=min_connections,
+        self.engine = create_engine(
-            maxconn=max_connections,
+            f'postgresql://{user}:{password}@{host}:{port}/{dbname}',
-            host=self.host,
+            poolclass=QueuePool,
-            port=self.port,
+            pool_size=min_connections,
-            user=self.user,
+            max_overflow=max_connections - min_connections,
-            password=self.password,
+            pool_pre_ping=True
-            dbname=self.dbname)
+        )
+        self.session_factory = sessionmaker(bind=self.engine)
 
-        super().__init__(logger, notification_handler)
+        BaseActivity.__init__(self, logger, notification_handler)
 
     def close(self):
-        self.pool.closeall()
+        self.engine.dispose()
 
     def __del__(self):
         self.close()
@@ -51,28 +54,32 @@ class Postgres(BaseActivity):
                 data (DataFrame): The data to export.
         """
 
+        self.logger.debug(
+            f"Exporting data to postgres: {input_data['data']}")
+
         schema = input_data["schema"]
         table_name = input_data["table_name"]
         data = DataFrame(input_data["data"])
 
-        conn = self.pool.getconn()
+        with self.session_factory() as session:
+            try:
+                data.to_sql(table_name, self.engine, schema=schema,
+                            if_exists="append", index=False)
+                session.commit()
 
-        try:
+            except Exception as e:
-            data.to_sql(table_name, conn, schema=schema,
+                trace = traceback.format_exc()
-                        if_exists="append", index=False)
+                self.notification_handler.build_and_send_notification(
-            conn.commit()
+                    notification_id="ERROR_EXPORTING_DATA_TO_POSTGRES",
+                    message=f"Error exporting data to postgres: {e}",
+                    block="export_data_to_postgres",
+                    level=NotificationLevel.ERROR,
+                    attachment_content=trace
+                )
 
-        except Exception as e:
+                self.logger.error(trace)
-            trace = traceback.format_exc()
-            self.notification_handler.build_and_send_notification(
-                notification_id="ERROR_EXPORTING_DATA_TO_POSTGRES",
-                message=f"Error exporting data to postgres: {e}",
-                block="export_data_to_postgres",
-                level=NotificationLevel.ERROR,
-                attachment_content=trace
-            )
 
-            self.logger.error(trace)
+            else:
-
+                self.logger.debug("Data exported to postgres")
-        finally:
+            finally:
-            self.pool.putconn(conn)
+                session.close()

scouter/activities/redis.py

@@ -4,15 +4,85 @@ with workflow.unsafe.imports_passed_through():
     from logging import Logger
     from sientia_do.notifications.handlers import NotificationHandler
     from scouter.activities.base import BaseActivity
+    import redis
+    import json
     from typing import Any
-    from kafka import KafkaConsumer
     from pandas import DataFrame
+    import numpy as np
+    from datetime import datetime
 
 
 class Redis(BaseActivity):
-    def __init__(self, host: str, port: int, db: int, logger: Logger, notification_handler: NotificationHandler):
+    def __init__(self, host: str, port: int,
+                 logger: Logger, notification_handler: NotificationHandler):
         self.host = host
         self.port = port
-        self.db = db
 
-        super().__init__(logger, notification_handler)f
+        self.redis_client = redis.Redis(
+            host=self.host,
+            port=self.port,
+            decode_responses=True
+        )
+
+        BaseActivity.__init__(self, logger, notification_handler)
+
+    def get(self, key: str):
+        history = self.redis_client.get(key)
+        return json.loads(history) if history else None
+
+    def set(self, key: str, data: dict, ttl=600):
+        self.redis_client.set(key, json.dumps(data), ex=ttl)
+
+    @activity.defn(name="group_and_hold_data")
+    async def group_and_hold_data(self, input_data: dict[str, Any]):
+        """
+        Groups and holds data in redis. Keep a copy of the most recent 
+        received data for a given pipeline and schedule. This activity updates
+        the data in redis and return the full keeped data.
+
+        Args:
+            input_data (dict[str, Any]): The data to group and hold.
+                workflow_name (str): The name of the workflow.
+                schedule_name (str): The name of the schedule.
+                data (dict[str, Any]): The data to group and hold.
+                retention_time (int): The retention time for data in redis in seconds.
+        """
+        self.logger.debug("Grouping and holding data...")
+        data = DataFrame(input_data['data'])
+        retention_time = input_data['retention_time']
+
+        key = f"{input_data['workflow_name']}_{input_data['schedule_name']}"
+
+        data_hold = self.get(key)
+
+        if not data_hold:
+            data_hold = {}
+            if data.empty:
+                self.logger.warning("No data to export")
+                return data_hold
+
+        for _, row in data.iterrows():
+            value = row['value']
+
+            if value is None:
+                data_hold[row['name']] = np.nan
+
+            else:
+                data_hold[row['name']] = value
+
+        data_hold['timestamp'] = data['timestamp'].max() if not data.empty else \
+            datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+
+        self.set(key, data_hold, ttl=retention_time)
+
+        data_hold_df = DataFrame(data_hold, index=[0])
+        data_hold_melted = data_hold_df.melt(
+            id_vars='timestamp', var_name='variable', value_name='value')
+        data_hold_melted['model_id'] = input_data['model_id']
+
+        data_hold_melted.reset_index(drop=True, inplace=True)
+
+        self.logger.debug(
+            f"Data grouped and held successfully:\n {data_hold_melted.to_string()}")
+
+        return data_hold_melted.to_dict()

scouter/utils/policies.py

@@ -0,0 +1,9 @@
+from temporalio.common import RetryPolicy
+from datetime import timedelta
+
+retry_policy = RetryPolicy(
+    initial_interval=timedelta(seconds=1),
+    backoff_coefficient=2.0,
+    maximum_interval=timedelta(minutes=1),
+    maximum_attempts=1
+)

scouter/utils/quality/filters.py

@@ -1,8 +1,20 @@
 from pandas import DataFrame
+import numpy as np
+from typing import Any
 
 
-def check_data_range(value, val_range: list) -> bool:
+def check_data_range(value: float | int | None, val_range: list) -> bool:
-    if not value:
+    """
+    Check if a value is out of a given range.
+
+    Args:
+        value (float | int | None): The value to check.
+        val_range (list): The range to check against.
+
+    Returns:
+        bool: True if the value is out of the range, False otherwise.
+    """
+    if value is None or np.isnan(value):
         return True
 
     bottom = val_range[0]
@@ -11,11 +23,32 @@ def check_data_range(value, val_range: list) -> bool:
     return value < bottom or value > up
 
 
-def out_of_bounds_filter(df: DataFrame, nodes_data_range: dict):
+def out_of_bounds_filter(df: DataFrame, model_tags: dict[str, Any]):
+    """
+    Filter out rows where the value is out of the range.
+
+    Args:
+        df (DataFrame): The DataFrame to filter.
+        model_tags (dict[str, Any]): The model tags. Contains
+        the data_range for each tag. If the tag does not have a data_range,
+        it will be considered as (-inf, inf).
+
+    Returns:
+        DataFrame: The filtered DataFrame.
+    """
     return df[df.apply(lambda x: check_data_range(
-        x['value'], nodes_data_range[x['tag']]),
+        x['value'], model_tags[x['name']].get('data_range', (-np.inf, np.inf))),
         axis=1)]
 
 
-def null_values_filter(df: DataFrame):
+def null_values_filter(df: DataFrame, _model_tags: dict[str, Any]):
+    """
+    Filter out rows where the value is null.
+
+    Args:
+        df (DataFrame): The DataFrame to filter.
+
+    Returns:
+        DataFrame: The filtered DataFrame.
+    """
     return df[df['value'].isnull()]

scouter/worker/worker.py

@@ -0,0 +1,136 @@
+from temporalio import workflow, client
+from temporalio.worker import Worker
+
+with workflow.unsafe.imports_passed_through():
+    import os
+    import logging
+    from sientia_do.notifications.handlers import NotificationHandler
+    from scouter.activities.activities import Activities
+    from scouter.workflow.scouter import Scouter
+    from scouter.workflow.sub_workflows.core_scouter import CoreScouter
+    from scouter.workflow.fake_data import FakeData
+    from scouter.activities.faker import Faker
+    import asyncio
+    import sys
+
+
+def build_postgres_config():
+    return {
+        'host': os.getenv('POSTGRES_HOST', 'localhost'),
+        'port': int(os.getenv('POSTGRES_PORT', '5432')),
+        'user': os.getenv('POSTGRES_USER', 'sientia'),
+        'password': os.getenv('POSTGRES_PASSWORD', 'sientia'),
+        'dbname': os.getenv('POSTGRES_DBNAME', 'sientia'),
+        'min_connections': int(os.getenv('POSTGRES_MIN_CONNECTIONS', '5')),
+        'max_connections': int(os.getenv('POSTGRES_MAX_CONNECTIONS', '20'))
+    }
+
+
+def build_kafka_config():
+    return {
+        'bootstrap_servers': os.getenv('KAFKA_BOOTSTRAP_SERVERS', 'localhost:9092'),
+        'polling_time': int(os.getenv('KAFKA_POLLING_TIME', '1000')),
+        'group_id': 'scouter-group'
+    }
+
+
+def build_redis_config():
+    return {
+        'host': os.getenv('REDIS_HOST', 'localhost'),
+        'port': int(os.getenv('REDIS_PORT', '6379')),
+    }
+
+
+async def main():
+
+    log_level = os.getenv('LOG_LEVEL', 'INFO').upper()
+
+    host = os.getenv('TEMPORAL_HOST', 'localhost:7233')
+    logger = logging.getLogger(__name__)
+    logger.setLevel(log_level)
+    stream_handler = logging.StreamHandler(sys.stdout)
+    stream_handler.setLevel(log_level)
+
+    stream_handler.setFormatter(
+        logging.Formatter(
+            '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+        )
+    )
+
+    logger.addHandler(stream_handler)
+
+    logger.info('Starting Worker...')
+
+    logger.info('Starting Notification Handler...')
+
+    notification_handler = NotificationHandler(
+        servers=os.getenv('KAFKA_BOOTSTRAP_SERVERS', 'http://localhost:9092'),
+        logger=logger,
+        project_name=os.getenv('PROJECT_NAME', 'scouter'),
+        pipeline_name='-',
+        trigger_name='-',
+        model_name='-',
+        model='-'
+    )
+
+    logger.info('Starting Activities...')
+
+    activities = Activities(
+        logger=logger,
+        notification_handler=notification_handler,
+        postgres_config=build_postgres_config(),
+        kafka_config=build_kafka_config(),
+        redis_config=build_redis_config()
+    )
+
+    logger.info('Starting Faker Activities...')
+
+    faker_activities = Faker(
+        logger=logger,
+        notification_handler=notification_handler,
+        bootstrap_servers=os.getenv(
+            'KAFKA_BOOTSTRAP_SERVERS', 'localhost:9092')
+    )
+
+    logger.info('Starting Temporal Client...')
+
+    temporal_client = await client.Client.connect(
+        target_host=host,
+        namespace=os.getenv('TEMPORAL_NAMESPACE', 'default')
+    )
+
+    logger.info('Starting Workers...')
+
+    workers = [
+        Worker(
+            temporal_client,
+            task_queue='scouter-queue',
+            workflows=[Scouter, CoreScouter],
+            activities=[
+                activities.load_from_kafka,
+                activities.data_quality_gate,
+                activities.aggregate_data,
+                activities.group_and_hold_data,
+                activities.export_data_to_postgres,
+            ]
+        ),
+        Worker(
+            temporal_client,
+            task_queue='fake_data-queue',
+            workflows=[FakeData],
+            activities=[
+                faker_activities.generate_and_send_data,
+            ]
+        )
+    ]
+
+    handlers = []
+    for w in workers:
+        handlers.append(w.run())
+
+    logger.info('Workers started successfully')
+
+    await asyncio.gather(*handlers)
+
+if __name__ == '__main__':
+    asyncio.run(main())

scouter/workflow/fake_data.py

@@ -0,0 +1,30 @@
+from temporalio import workflow
+
+with workflow.unsafe.imports_passed_through():
+    from scouter.activities.faker import Faker
+    from datetime import timedelta
+    from typing import Dict, Any
+    from scouter.utils.policies import retry_policy
+
+
+@workflow.defn(name="fake_data")
+class FakeData:
+    @workflow.run
+    async def run(self, workflow_input: Dict[str, Any]) -> str:
+        """
+        Generates random data and sends it to a Kafka topic.
+
+        Args:
+            workflow_input (dict[str, Any]): The input data containing:
+                topic (str): The Kafka topic to send data to
+                num_messages (int, optional): Number of messages to generate. 
+                Defaults to random.randint(1, len(self.tags)).
+        """
+        await workflow.execute_activity_method(
+            Faker.generate_and_send_data,
+            {
+                'topic': workflow_input['topic']
+            },
+            retry_policy=retry_policy,
+            start_to_close_timeout=timedelta(seconds=60)
+        )

scouter/workflow/scouter.py

@@ -0,0 +1,50 @@
+from temporalio import workflow
+
+with workflow.unsafe.imports_passed_through():
+    from scouter.activities.activities import Activities
+    from typing import Any
+    from datetime import timedelta
+    from scouter.utils.policies import retry_policy
+
+
+@workflow.defn(name="scouter")
+class Scouter:
+    @workflow.run
+    async def run(self, input_data: dict[str, Any]):
+        """
+        Scouter workflow. Loads data from kafka and sends it to the core_scouter
+        workflow.
+
+        Args:
+            input_data (dict[str, Any]): The data to process. Contains:
+                topic (str): The topic to load data from.
+                workflow_name (str): The name of the workflow.
+                schedule_name (str): The name of the schedule.
+                model_name (str): The name of the model.
+                model_id (str): The id of the model.
+                trigger_laborious (bool): Whether to trigger laborious.
+                filters (dict[str, str]): The filters to apply.
+                schema (str): The schema of the table to export data to.
+                table_name (str): The name of the table to export data to.
+                retention_time (int): The retention time for data in redis in seconds.
+                model_tags (dict[str, Any]): The tags of the model. And it's respective configuration.
+        """
+
+        data = await workflow.execute_activity_method(
+            Activities.load_from_kafka,
+            {
+                'topic': input_data['topic']
+            },
+            retry_policy=retry_policy,
+            start_to_close_timeout=timedelta(seconds=60)
+        )
+
+        if data == {}:
+            return
+
+        input_data['data'] = data
+
+        await workflow.execute_child_workflow(
+            'core_scouter',
+            input_data
+        )

scouter/workflow/sub_workflows/core_scouter.py

@@ -0,0 +1,84 @@
+from temporalio import workflow
+
+with workflow.unsafe.imports_passed_through():
+    from scouter.activities.activities import Activities
+    from typing import Any
+    from datetime import timedelta
+    from scouter.utils.policies import retry_policy
+
+
+@workflow.defn(name="core_scouter")
+class CoreScouter:
+    @workflow.run
+    async def run(self, input_data: dict[str, Any]):
+        """
+        Core scouter workflow. Passes data through data_quality_gate,
+        group_and_hold_data, and then asynchronously exports data to postgres
+        using export_data_to_postgres and in the future will trigger_laborious
+        if needed.
+
+        Args:
+            input_data (dict[str, Any]): The data to process. Contains:
+                workflow_name (str): The name of the workflow.
+                schedule_name (str): The name of the schedule.
+                model_name (str): The name of the model.
+                model_id (str): The id of the model.
+                data (dict[str, Any]): The data to process.
+                trigger_laborious (bool): Whether to trigger laborious.
+                filters (dict[str, str]): The filters to apply.
+                schema (str): The schema of the table to export data to.
+                table_name (str): The name of the table to export data to.
+                retention_time (int): The retention time for data in redis in seconds.
+        """
+
+        filtered_data = await workflow.execute_local_activity_method(
+            Activities.data_quality_gate,
+            {
+                'filters': input_data['filters'],
+                'data': input_data['data'],
+                'model_tags': input_data['model_tags']
+            },
+            retry_policy=retry_policy,
+            start_to_close_timeout=timedelta(seconds=60)
+        )
+
+        grouped_data = await workflow.execute_local_activity_method(
+            Activities.aggregate_data,
+            {
+                'data': filtered_data,
+                'model_tags': input_data['model_tags']
+            },
+            retry_policy=retry_policy,
+            start_to_close_timeout=timedelta(seconds=60)
+        )
+
+        held_data = await workflow.execute_local_activity_method(
+            Activities.group_and_hold_data,
+            {
+                'workflow_name': input_data['workflow_name'],
+                'schedule_name': input_data['schedule_name'],
+                'data': grouped_data,
+                'model_id': input_data['model_id'],
+                'retention_time': input_data['retention_time']
+            },
+            retry_policy=retry_policy,
+            start_to_close_timeout=timedelta(seconds=60)
+        )
+
+        if held_data == {}:
+            return
+
+        async_export = workflow.execute_activity_method(
+            Activities.export_data_to_postgres,
+            {
+                'schema': input_data['schema'],
+                'table_name': input_data['table_name'],
+                'data': held_data
+            },
+            retry_policy=retry_policy,
+            start_to_close_timeout=timedelta(seconds=60)
+        )
+
+        # TODO: Trigger laborious if needed
+
+        await async_export

tests/activities/test_base.py

@@ -0,0 +1,36 @@
+from unittest.mock import MagicMock
+from pytest import fixture
+from sientia_do.notifications.models import Notification
+from scouter.activities.base import BaseActivity
+
+
+@fixture
+def base_activity():
+    return BaseActivity(
+        logger=MagicMock(),
+        notification_handler=MagicMock(),
+    )
+
+
+def test_prepare_activity(base_activity):
+    base_activity.notification_handler.base_notification = Notification(
+        project="project",
+        pipeline="pipeline",
+        trigger="-",
+        model_name="-",
+        model_id="-",
+    )
+
+    base_activity.prepare_activity(
+        {
+            'workflow_name': 'test_workflow',
+            'schedule_name': 'test_schedule',
+            'model_name': 'test_model',
+            'model_id': 'test_model_id',
+        }
+    )
+
+    assert base_activity.notification_handler.base_notification.schedule_name == "test_schedule"
+    assert base_activity.notification_handler.base_notification.model_name == "test_model"
+    assert base_activity.notification_handler.base_notification.model_id == "test_model_id"
+    assert base_activity.notification_handler.base_notification.pipeline_name == "test_workflow"

tests/activities/test_faker.py

@@ -0,0 +1,108 @@
+import pytest
+from unittest.mock import MagicMock, patch, call
+from scouter.activities.faker import Faker
+from logging import Logger
+from sientia_do.notifications.handlers import NotificationHandler
+
+
+@pytest.fixture
+def mock_kafka_producer():
+    with patch('scouter.activities.faker.KafkaProducer') as mock:
+        producer = MagicMock()
+        mock.return_value = producer
+        yield producer
+
+
+@pytest.fixture
+def mock_datetime():
+    with patch('scouter.activities.faker.datetime') as mock_dt:
+        mock_dt.now.return_value.strftime.return_value = '2025-05-14 14:54:24'
+        yield mock_dt
+
+
+@pytest.fixture
+def faker_instance(mock_kafka_producer):
+    logger = MagicMock(spec=Logger)
+    notification_handler = MagicMock(spec=NotificationHandler)
+    return Faker(
+        bootstrap_servers='localhost:9092',
+        logger=logger,
+        notification_handler=notification_handler
+    )
+
+
+@pytest.mark.asyncio
+async def test_faker_init(faker_instance, mock_kafka_producer):
+    """Test Faker initialization with correct parameters"""
+    assert faker_instance.producer is not None
+    assert len(faker_instance.tags) == 6
+
+
+@pytest.mark.asyncio
+async def test_generate_and_send_data_default_count(faker_instance, mock_kafka_producer, mock_datetime):
+    """Test generating data with default message count"""
+    # Mock random.choice to control the output
+    with patch('random.choice') as mock_choice, \
+            patch('random.uniform', return_value=42.5), \
+            patch('random.randint', return_value=3):
+
+        # Setup mock for tag and name selection
+        mock_choice.side_effect = [
+            'ns=1;i=1001',
+            'ns=1;i=1002',
+            'ns=1;i=1003'
+        ]
+
+        # Call the method
+        await faker_instance.generate_and_send_data({'topic': 'test_topic'})
+
+        # Verify the producer was called 3 times (default count)
+        assert mock_kafka_producer.send.call_count == 3
+        mock_kafka_producer.flush.assert_called_once()
+
+        # Verify the message format
+        expected_data = {
+            'tag': 'ns=1;i=1001',
+            'name': 'Temperature Sensor',
+            'timestamp': '2025-05-14 14:54:24',
+            'value': 42.5
+        }
+        mock_kafka_producer.send.assert_any_call(
+            'test_topic', value=expected_data)
+
+
+@pytest.mark.asyncio
+async def test_generate_and_send_data_custom_count(faker_instance, mock_kafka_producer):
+    """Test generating data with custom message count"""
+    # Call the method with custom count
+    await faker_instance.generate_and_send_data({
+        'topic': 'test_topic',
+        'num_messages': 2
+    })
+
+    # Verify the producer was called 2 times
+    assert mock_kafka_producer.send.call_count == 2
+    mock_kafka_producer.flush.assert_called_once()
+
+
+@pytest.mark.asyncio
+async def test_generate_and_send_data_no_topic(faker_instance):
+    """Test that ValueError is raised when no topic is provided"""
+    with pytest.raises(ValueError, match="Topic must be specified in input_data"):
+        await faker_instance.generate_and_send_data({})
+
+
+@pytest.mark.asyncio
+async def test_generate_and_send_data_random_values(faker_instance, mock_kafka_producer):
+    """Test that random values are within expected ranges"""
+    # Call the method
+    await faker_instance.generate_and_send_data({'topic': 'test_topic'})
+
+    # Get the call arguments
+    call_args = mock_kafka_producer.send.call_args[1]['value']
+
+    # Verify the data structure
+    assert 'tag' in call_args
+    assert call_args['tag'] in faker_instance.tags
+    assert 'value' in call_args
+    assert 0 <= call_args['value'] <= 100

tests/activities/test_gates.py

@@ -0,0 +1,290 @@
+from unittest.mock import Mock, patch, MagicMock
+import numpy as np
+import pandas as pd
+import pytest
+from sientia_do.notifications.models import NotificationLevel
+from scouter.activities.gates import Gates
+
+
+@pytest.fixture
+def gates_fixture():
+    """Fixture to create a Gates instance with mocked dependencies."""
+    logger = Mock()
+    notification_handler = MagicMock()
+    return Gates(logger=logger, notification_handler=notification_handler)
+
+
+@pytest.mark.asyncio
+async def test_data_quality_gate_with_null_values_filter_discard(gates_fixture):
+    """Test data_quality_gate with NULL_VALUES_FILTER and DISCARD policy."""
+    # Setup test data
+    input_data = {
+        'filters': {
+            'NULL_VALUES_FILTER': 'DISCARD'
+        },
+        'data': {
+            'tag': ['tag1', 'tag2', 'tag3'],
+            'value': [1.0, None, 3.0],
+            'timestamp': ['2023-01-01', '2023-01-02', '2023-01-03'],
+        },
+        'model_tags': {
+            'tag1': {'data_range': [0, 100]},
+            'tag2': {'data_range': [0, 100]},
+            'tag3': {'data_range': [0, 100]}
+        }
+    }
+
+    # Execute
+    result = await gates_fixture.data_quality_gate(input_data)
+
+    # Verify
+    assert len(result['tag']) == 2
+    assert 'tag2' not in result['tag']
+    gates_fixture.notification_handler.build_and_send_notification.assert_called_once()
+
+
+@pytest.mark.asyncio
+async def test_data_quality_gate_with_out_of_bounds_filter_keep(gates_fixture):
+    """Test data_quality_gate with OUT_OF_BOUNDS_FILTER and KEEP policy."""
+    # Setup test data with out of bounds values
+    input_data = {
+        'filters': {
+            'OUT_OF_BOUNDS_FILTER': 'KEEP'
+        },
+        'data': {
+            'tag': ['tag1', 'tag2', 'tag3'],
+            'value': [1.0, 200.0, 3.0],
+            'timestamp': ['2023-01-01', '2023-01-02', '2023-01-03']
+        },
+        'model_tags': {
+            'tag1': {'data_range': [0, 100]},
+            'tag2': {'data_range': [0, 100]},
+            'tag3': {'data_range': [0, 100]}
+        }
+    }
+
+    # Mock the out_of_bounds_filter to return rows with out of bounds values
+    with patch('scouter.activities.gates.quality_gate_filters', {
+        'OUT_OF_BOUNDS_FILTER': lambda df: df[df['tag'] == 'tag2']
+    }):
+        # Execute
+        result = await gates_fixture.data_quality_gate(input_data)
+
+    # Verify data is kept but notification is sent
+    assert len(result['tag']) == 3  # All rows kept
+    gates_fixture.notification_handler.build_and_send_notification.assert_called_once()
+
+
+@pytest.mark.asyncio
+async def test_data_quality_gate_with_multiple_filters(gates_fixture):
+    """Test data_quality_gate with multiple filters."""
+    # Setup test data
+    input_data = {
+        'filters': {
+            'NULL_VALUES_FILTER': 'DISCARD',
+            'OUT_OF_BOUNDS_FILTER': 'DISCARD'
+        },
+        'data': {
+            'tag': ['tag1', 'tag2', 'tag3', 'tag4'],
+            'name': ['tag1', 'tag2', 'tag3', 'tag4'],
+            'value': [1.0, None, 300.0, 4.0],
+            'timestamp': ['2023-01-01', '2023-01-02', '2023-01-03', '2023-01-04']
+        },
+        'model_tags': {
+            'tag1': {'data_range': [0, 100]},
+            'tag2': {'data_range': [0, 100]},
+            'tag3': {'data_range': [0, 100]},
+            'tag4': {'data_range': [0, 100]}
+        }
+    }
+
+    result = await gates_fixture.data_quality_gate(input_data)
+
+    # Verify only tag1 and tag4 remain (tag2 has null, tag3 is out of bounds)
+    assert result == {'tag': {0: 'tag1', 3: 'tag4'}, 'name': {0: 'tag1', 3: 'tag4'}, 'value': {
+        0: 1.0, 3: 4.0}, 'timestamp': {0: '2023-01-01', 3: '2023-01-04'}}
+    # Should be called twice (once for each filter)
+    assert gates_fixture.notification_handler.build_and_send_notification.call_count == 2
+
+
+@pytest.mark.asyncio
+async def test_data_quality_gate_with_unknown_filter(gates_fixture):
+    """Test data_quality_gate with an unknown filter."""
+    # Setup test data with unknown filter
+    input_data = {
+        'filters': {
+            'UNKNOWN_FILTER': 'DISCARD'
+        },
+        'data': {
+            'tag': ['tag1'],
+            'name': ['tag1'],
+            'value': [1.0],
+            'timestamp': ['2023-01-01']
+        },
+        'model_tags': {
+            'tag1': {'data_range': [0, 100]}
+        }
+    }
+
+    # Execute
+    result = await gates_fixture.data_quality_gate(input_data)
+
+    # Verify data is unchanged and warning is logged
+    assert len(result['tag']) == 1
+    gates_fixture.logger.warning.assert_called_once_with(
+        "Filter UNKNOWN_FILTER not found")
+
+
+@pytest.mark.asyncio
+async def test_data_quality_gate_with_filter_error(gates_fixture):
+    """Test data_quality_gate when a filter raises an exception."""
+    # Setup test data
+    input_data = {
+        'filters': {
+            'NULL_VALUES_FILTER': 'DISCARD'
+        },
+        'data': {
+            'tag': ['tag1'],
+            'name': ['tag1'],
+            'value': [1.0],
+            'timestamp': ['2023-01-01']
+        },
+        'model_tags': {
+            'tag1': {'data_range': [0, 100]}
+        }
+    }
+
+    # Mock the filter to raise an exception
+    def failing_filter(_, _model_tags):
+        raise ValueError("Filter error")
+
+    with patch('scouter.activities.gates.quality_gate_filters', {
+        'NULL_VALUES_FILTER': failing_filter
+    }):
+        # Execute
+        result = await gates_fixture.data_quality_gate(input_data)
+
+    # Verify error notification is sent and data is unchanged
+    assert len(result['tag']) == 1
+    gates_fixture.notification_handler.build_and_send_notification.assert_called_once()
+    call_args = gates_fixture.notification_handler.build_and_send_notification.call_args[1]
+    assert call_args['notification_id'] == "DATA_QUALITY_GATE_ISSUES"
+    assert call_args['level'] == NotificationLevel.ERROR
+    assert "Filter error" in call_args['message']
+
+
+@pytest.mark.asyncio
+async def test_data_quality_gate_with_empty_data(gates_fixture):
+    """Test data_quality_gate with empty input data."""
+    # Setup empty input data
+    input_data = {
+        'filters': {
+            'NULL_VALUES_FILTER': 'DISCARD'
+        },
+        'data': {
+            'tag': [],
+            'name': [],
+            'value': [],
+            'timestamp': []
+        },
+        'model_tags': {}
+    }
+
+    # Execute
+    result = await gates_fixture.data_quality_gate(input_data)
+
+    # Verify empty result and no notifications
+    assert len(result['tag']) == 0
+    gates_fixture.notification_handler.build_and_send_notification.assert_not_called()
+
+
+@pytest.mark.asyncio
+async def test_data_quality_gate_with_no_filters(gates_fixture):
+    """Test data_quality_gate with no filters specified."""
+    # Setup test data with no filters
+    input_data = {
+        'filters': {},
+        'data': {
+            'tag': ['tag1'],
+            'name': ['tag1'],
+            'value': [1.0],
+            'timestamp': ['2023-01-01']
+        },
+        'model_tags': {
+            'tag1': {'data_range': [0, 100]}
+        }
+    }
+
+    # Execute
+    result = await gates_fixture.data_quality_gate(input_data)
+
+    # Verify data is unchanged and no notifications
+    assert len(result['tag']) == 1
+    gates_fixture.notification_handler.build_and_send_notification.assert_not_called()
+
+
+@pytest.mark.parametrize(
+    "group_data, aggr_function, expected_result",
+    [
+        # Single value case
+        (pd.DataFrame({'value': [10.0]}), 'avg', 10.0),
+        # Multiple values with different aggregation functions
+        (pd.DataFrame({'value': [1.0, 2.0, 3.0, 4.0]}), 'avg', 2.5),
+        (pd.DataFrame({'value': [1.0, 2.0, 3.0, 4.0]}), 'mdn', 2.5),
+        (pd.DataFrame({'value': [1.0, 2.0, 3.0, 4.0]}), 'max', 4.0),
+        (pd.DataFrame({'value': [1.0, 2.0, 3.0, 4.0]}), 'min', 1.0),
+        (pd.DataFrame({'value': [1.0, 2.0, 3.0, 4.0]}), 'lts', 4.0),
+        # With NaN values
+        (pd.DataFrame({'value': [1.0, np.nan, 3.0, 4.0]}),
+         'avg', 2.6666666666666665),
+        # Empty group after dropping NaN
+        (pd.DataFrame({'value': [np.nan, np.nan]}), 'avg', None),
+        # Invalid aggregation function
+        (pd.DataFrame({'value': [1.0, 2.0]}), 'invalid', 'continue'),
+    ]
+)
+def test_apply_aggregation(gates_fixture, group_data, aggr_function, expected_result):
+    """Test apply_aggregation method with various scenarios."""
+    result = gates_fixture.apply_aggregation(group_data, aggr_function)
+    assert result == expected_result
+
+    # Check notification was sent for invalid function
+    if aggr_function == 'invalid':
+        gates_fixture.notification_handler.build_and_send_notification.assert_called_once()
+    else:
+        gates_fixture.notification_handler.build_and_send_notification.assert_not_called()
+
+
+@pytest.mark.asyncio
+async def test_aggregate_data(gates_fixture):
+    """Test aggregate_data method with multiple groups and aggregation functions."""
+    input_data = {
+        'data': [
+            {'tag': 'tag1', 'name': 'name1', 'value': 1.0, 'timestamp': '2023-01-01'},
+            {'tag': 'tag1', 'name': 'name1', 'value': 2.0, 'timestamp': '2023-01-02'},
+            {'tag': 'tag1', 'name': 'name1', 'value': 3.0, 'timestamp': '2023-01-03'},
+            {'tag': 'tag2', 'name': 'name2', 'value': 4.0, 'timestamp': '2023-01-01'},
+            {'tag': 'tag2', 'name': 'name2', 'value': 5.0, 'timestamp': '2023-01-02'},
+            {'tag': 'tag2', 'name': 'name2', 'value': 6.0, 'timestamp': '2023-01-03'},
+            {'tag': 'tag1', 'name': 'name1',
+                'value': None, 'timestamp': '2023-01-04'},
+        ],
+        'model_tags': {
+            'name1': {'aggr_function': 'avg'},
+            'name2': {'aggr_function': 'max'},
+        }
+    }
+
+    # Expected result
+    expected_result = {'tag': {0: 'tag1', 1: 'tag2'},
+                       'name': {0: 'name1', 1: 'name2'},
+                       'value': {0: 2.0, 1: 6.0},
+                       'timestamp': {0: '2023-01-04', 1: '2023-01-03'},
+                       'aggregation_function': {0: 'avg', 1: 'max'}}
+
+    # Execute
+    result = await gates_fixture.aggregate_data(input_data)
+
+    # Verify
+    assert result == expected_result
+    gates_fixture.notification_handler.build_and_send_notification.assert_not_called()

tests/activities/test_kafka.py

@@ -1,5 +1,5 @@
 from unittest.mock import MagicMock, patch, ANY
-from pytest import fixture
+from pytest import fixture, mark
 from pandas import DataFrame
 from scouter.activities.kafka import Kafka
 
@@ -38,7 +38,8 @@ def test___init__(kafka_consumer):
     )
 
 
-def test_load_from_kafka(kafka):
+@mark.asyncio
+async def test_load_from_kafka(kafka):
     input_data = {"topic": "test-topic"}
 
     data = [
@@ -55,7 +56,7 @@ def test_load_from_kafka(kafka):
 
     expected = DataFrame([d.value for d in data[0][1]]).to_dict()
 
-    result = kafka.load_from_kafka(input_data)
+    result = await kafka.load_from_kafka(input_data)
 
     assert result == expected
 

tests/activities/test_postgres.py

@@ -0,0 +1,90 @@
+from unittest.mock import ANY, MagicMock, patch
+from pytest import fixture
+from pytest import mark
+from sientia_do.notifications.models import NotificationLevel
+
+from scouter.activities.postgres import Postgres
+
+
+@fixture
+@patch("scouter.activities.postgres.create_engine")
+@patch("scouter.activities.postgres.sessionmaker")
+def postgres_client(mock_sessionmaker, mock_engine):
+    # Create a mock session
+    mock_session = MagicMock()
+    mock_session.commit = MagicMock()
+    mock_session.close = MagicMock()
+
+    # Configure the session to work with context management
+    mock_session.__enter__ = MagicMock(return_value=mock_session)
+    mock_session.__exit__ = MagicMock(return_value=None)
+
+    # Configure the sessionmaker to return our mock session
+    mock_sessionmaker.return_value = mock_session
+
+    # Configure the engine to return our mock sessionmaker
+    mock_engine.return_value = MagicMock()
+    mock_engine.return_value.dispose = MagicMock()
+
+    # Create the Postgres client
+    client = Postgres(
+        host="localhost",
+        port=5432,
+        user="postgres",
+        password="postgres",
+        dbname="postgres",
+        min_connections=1,
+        max_connections=10,
+        logger=MagicMock(),
+        notification_handler=MagicMock(),
+    )
+
+    # Set up the session factory
+    client.session_factory = mock_sessionmaker
+
+    return client
+
+
+@mark.asyncio
+@patch("scouter.activities.postgres.DataFrame")
+async def test_export_data_to_postgres_success(mock_dataframe, postgres_client):
+    data = {"schema": "test", "table_name": "test",
+            "data": {"a": [1, 2, 3], "b": [4, 5, 6]}}
+    await postgres_client.export_data_to_postgres(data)
+
+    # Verify notification handler wasn't called
+    postgres_client.notification_handler.build_and_send_notification.assert_not_called()
+
+    # Verify session handling
+    mock_dataframe.assert_called_once_with(data["data"])
+    mock_dataframe.return_value.to_sql.assert_called_once_with(
+        data["table_name"],
+        postgres_client.engine,
+        schema=data["schema"],
+        if_exists="append",
+        index=False
+    )
+    postgres_client.session_factory.return_value.commit.assert_called_once()
+    postgres_client.session_factory.return_value.close.assert_called_once()
+
+
+@mark.asyncio
+@patch("scouter.activities.postgres.DataFrame", return_value=MagicMock(
+    to_sql=MagicMock(side_effect=Exception("Error exporting data to postgres"))
+))
+async def test_export_data_to_postgres_error(_mock_dataframe, postgres_client):
+    data = {"schema": "test", "table_name": "test",
+            "data": {"a": [1, 2, 3], "b": [4, 5, 6]}}
+    await postgres_client.export_data_to_postgres(data)
+
+    # Verify error notification was sent
+    postgres_client.notification_handler.build_and_send_notification.assert_called_once_with(
+        notification_id="ERROR_EXPORTING_DATA_TO_POSTGRES",
+        message="Error exporting data to postgres: Error exporting data to postgres",
+        block="export_data_to_postgres",
+        level=NotificationLevel.ERROR,
+        attachment_content=ANY
+    )
+
+    # Verify session handling
+    postgres_client.session_factory.return_value.close.assert_called_once()

tests/activities/test_redis.py

@@ -0,0 +1,208 @@
+import json
+from unittest.mock import MagicMock, patch
+from datetime import datetime
+import pytest
+import numpy as np
+from pandas import DataFrame
+from sientia_do.notifications.handlers import NotificationHandler
+from scouter.activities.redis import Redis
+
+
+@pytest.fixture
+@patch('scouter.activities.redis.redis.Redis')
+def redis_activity(_mock_redis_client):
+    logger = MagicMock()
+    notification_handler = MagicMock(spec=NotificationHandler)
+    return Redis(host='localhost', port=6379,
+                 logger=logger, notification_handler=notification_handler)
+
+
+@patch('scouter.activities.redis.redis.Redis')
+def test_redis_initialization(mock_redis_client):
+    """Test Redis activity initialization"""
+    redis_activity = Redis(host='localhost', port=6379,
+                           logger=MagicMock(), notification_handler=MagicMock())
+    assert redis_activity.host == 'localhost'
+    assert redis_activity.port == 6379
+    mock_redis_client.assert_called_once_with(
+        host='localhost',
+        port=6379,
+        decode_responses=True
+    )
+
+
+def test_get_existing_key(redis_activity):
+    """Test getting an existing key from Redis"""
+    test_data = {'key': 'value'}
+    redis_activity.redis_client.get.return_value = json.dumps(test_data)
+
+    result = redis_activity.get('test_key')
+
+    assert result == test_data
+    redis_activity.redis_client.get.assert_called_once_with('test_key')
+
+
+def test_get_nonexistent_key(redis_activity):
+    """Test getting a non-existent key from Redis"""
+    redis_activity.redis_client.get.return_value = None
+
+    result = redis_activity.get('nonexistent_key')
+
+    assert result is None
+    redis_activity.redis_client.get.assert_called_once_with('nonexistent_key')
+
+
+def test_set_key(redis_activity):
+    """Test setting a key in Redis"""
+    test_data = {'key': 'value'}
+
+    redis_activity.set('test_key', test_data, ttl=300)
+
+    redis_activity.redis_client.set.assert_called_once_with(
+        'test_key',
+        json.dumps(test_data),
+        ex=300
+    )
+
+
+@pytest.mark.asyncio
+async def test_group_and_hold_data_new_key(redis_activity):
+    """Test group_and_hold_data with a new key"""
+    # Setup
+    test_data = {
+        'workflow_name': 'test_pipeline',
+        'schedule_name': 'test_schedule',
+        'retention_time': 3600,
+        'model_id': 1,
+        'data': DataFrame({
+            'name': ['sensor1', 'sensor2'],
+            'value': [25.5, 30.0],
+            'timestamp': ['2023-01-01 12:00:00'] * 2
+        }).to_dict('records')
+    }
+
+    # Mock get to return None for new key
+    redis_activity.get = MagicMock(return_value=None)
+    redis_activity.set = MagicMock()
+
+    # Call the method
+    result = await redis_activity.group_and_hold_data(test_data)
+
+    # Verify the result
+    expected_result = {
+        'timestamp': {0: '2023-01-01 12:00:00', 1: '2023-01-01 12:00:00'},
+        'variable': {0: 'sensor1', 1: 'sensor2'},
+        'value': {0: 25.5, 1: 30.0},
+        'model_id': {0: 1, 1: 1}
+    }
+    assert result == expected_result
+
+    # Verify set was called with correct arguments
+    redis_activity.set.assert_called_once()
+    args, kwargs = redis_activity.set.call_args
+    assert args[0] == 'test_pipeline_test_schedule'
+    assert args[1] == {
+        'sensor1': 25.5,
+        'sensor2': 30.0,
+        'timestamp': '2023-01-01 12:00:00'
+    }
+    assert kwargs['ttl'] == 3600
+
+
+@pytest.mark.asyncio
+async def test_group_and_hold_data_update_existing(redis_activity):
+    """Test updating existing data with group_and_hold_data"""
+    # Setup initial data in Redis
+    existing_data = {
+        'sensor1': 20.0,
+        'sensor2': 28.0,
+        'timestamp': '2023-01-01 11:00:00'
+    }
+
+    # New data to update with
+    test_data = {
+        'workflow_name': 'test_workflow',
+        'schedule_name': 'test_schedule',
+        'retention_time': 3600,
+        'model_id': 1,
+        'data': DataFrame({
+            'name': ['sensor1', 'sensor3'],
+            'value': [25.5, 42.0],
+            'timestamp': ['2023-01-01 12:00:00'] * 2
+        }).to_dict('records')
+    }
+
+    # Mock get to return existing data
+    redis_activity.get = MagicMock(return_value=existing_data)
+    redis_activity.set = MagicMock()
+
+    # Call the method
+    result = await redis_activity.group_and_hold_data(test_data)
+
+    # Verify the result
+    expected_result = {
+        'timestamp': {0: '2023-01-01 12:00:00', 1: '2023-01-01 12:00:00', 2: '2023-01-01 12:00:00'},
+        'variable': {0: 'sensor1', 1: 'sensor2', 2: 'sensor3'},
+        'value': {0: 25.5, 1: 28.0, 2: 42.0},
+        'model_id': {0: 1, 1: 1, 2: 1}
+    }
+    assert result == expected_result
+
+    # Verify set was called with correct arguments
+    redis_activity.set.assert_called_once()
+    args, kwargs = redis_activity.set.call_args
+    assert args[0] == 'test_workflow_test_schedule'
+    assert args[1] == {
+        'sensor1': 25.5,
+        'sensor2': 28.0,
+        'sensor3': 42.0,
+        'timestamp': '2023-01-01 12:00:00'
+    }
+    assert kwargs['ttl'] == 3600
+
+
+@pytest.mark.asyncio
+async def test_group_and_hold_data_with_none_values(redis_activity):
+    """Test handling of None values in group_and_hold_data"""
+    # Setup test data with None values
+    test_data = {
+        'workflow_name': 'test_workflow',
+        'schedule_name': 'test_schedule',
+        'retention_time': 3600,
+        'model_id': 1,
+        'data': DataFrame({
+            'name': ['sensor1', 'sensor2'],
+            'value': [None, 30.0],
+            'timestamp': [datetime(2023, 1, 1, 12, 0, 0)] * 2
+        }).to_dict('records')
+    }
+
+    # Mock get to return None for new key
+    redis_activity.get = MagicMock(return_value=None)
+    redis_activity.set = MagicMock()
+
+    # Call the method
+    result = await redis_activity.group_and_hold_data(test_data)
+
+    # Verify None was converted to np.nan and values are as expected
+    assert np.isnan(result['value'][0])
+    assert result['value'][1] == pytest.approx(30.0)
+
+
+@pytest.mark.asyncio
+async def test_group_and_hold_data_empty_dataframe(redis_activity):
+    """Test group_and_hold_data with empty DataFrame"""
+    # Setup test with empty data
+    test_data = {
+        'workflow_name': 'test_workflow',
+        'schedule_name': 'test_schedule',
+        'retention_time': 3600,
+        'data': DataFrame(columns=['name', 'value', 'timestamp']).to_dict('records')
+    }
+
+    redis_activity.get = MagicMock(return_value=None)
+
+    # Call the method
+    result = await redis_activity.group_and_hold_data(test_data)
+
+    assert result == {}

tests/utils/quality/test_filters.py

@@ -0,0 +1,132 @@
+import pytest
+import pandas as pd
+import numpy as np
+from pandas.testing import assert_frame_equal
+from scouter.utils.quality.filters import check_data_range, out_of_bounds_filter, null_values_filter
+
+# Fixtures
+
+
+@pytest.fixture
+def sample_dataframe():
+    """Fixture providing a sample DataFrame for testing."""
+    return pd.DataFrame({
+        'tag': ['temp', 'temp', 'pressure', 'pressure', 'humidity', 'wind_speed'],
+        'name': ['temp', 'temp', 'pressure', 'pressure', 'humidity', 'wind_speed'],
+        'value': [25, 35, 95, 105, 60, None],
+        'timestamp': pd.date_range(start='2023-01-01', periods=6)
+    })
+
+
+@pytest.fixture
+def nodes_data_range():
+    """Fixture providing data ranges for different tags."""
+    return {
+        'temp': {'data_range': [10, 30]},
+        'pressure': {'data_range': [90, 100]},
+        'humidity': {'data_range': [40, 80]},
+        'wind_speed': {'data_range': [0, 50]}
+    }
+
+
+# Parameterized test data
+CHECK_DATA_RANGE_CASES = [
+    # (value, val_range, expected)
+    # Values within range
+    (5, [0, 10], False),
+    (0, [0, 10], False),  # Edge case: value equals lower bound
+    (10, [0, 10], False),  # Edge case: value equals upper bound
+    # Values outside range
+    (-1, [0, 10], True),
+    (11, [0, 10], True),
+    # Single value range
+    (5, [5, 5], False),
+    (4, [5, 5], True),
+    # Empty or None value
+    (None, [0, 10], True),
+    (np.nan, [0, 10], True),
+]
+
+# Tests for check_data_range
+
+
+@pytest.mark.parametrize('value,val_range,expected', CHECK_DATA_RANGE_CASES)
+def test_check_data_range(value, val_range, expected):
+    """Test the check_data_range function with various input scenarios."""
+    result = check_data_range(value, val_range)
+    if isinstance(value, float) and np.isnan(value):
+        assert result is True
+    else:
+        assert result == expected
+
+# Tests for out_of_bounds_filter
+
+
+def test_out_of_bounds_filter(sample_dataframe, nodes_data_range):
+    """Test filtering out-of-bounds values from a DataFrame."""
+    # Expected result: rows where value is outside the defined range
+    expected_data = {
+        'tag': ['temp', 'pressure', 'wind_speed'],
+        'name': ['temp', 'pressure', 'wind_speed'],
+        'value': [35, 105, None],
+        'timestamp': [
+            pd.Timestamp('2023-01-02'),
+            pd.Timestamp('2023-01-04'),
+            pd.Timestamp('2023-01-06')
+        ]
+    }
+    expected_df = pd.DataFrame(expected_data)
+
+    result = out_of_bounds_filter(sample_dataframe, nodes_data_range)
+    result = result.reset_index(drop=True)
+    expected_df = expected_df.reset_index(drop=True)
+
+    assert_frame_equal(result, expected_df)
+
+
+def test_out_of_bounds_filter_empty_df(nodes_data_range):
+    """Test with an empty DataFrame."""
+    df = pd.DataFrame(columns=['tag', 'name', 'value', 'timestamp'])
+    result = out_of_bounds_filter(df, nodes_data_range)
+    assert result.empty
+    assert list(result.columns) == ['tag', 'name', 'value', 'timestamp']
+
+# Tests for null_values_filter
+
+
+def test_null_values_filter(sample_dataframe, nodes_data_range):
+    """Test filtering null values from a DataFrame."""
+    expected_data = {
+        'tag': ['wind_speed'],
+        'name': ['wind_speed'],
+        'value': [None],
+        'timestamp': [pd.Timestamp('2023-01-06')]
+    }
+    expected_df = pd.DataFrame(expected_data)
+
+    result = null_values_filter(sample_dataframe, nodes_data_range)
+    result = result.reset_index(drop=True)
+    expected_df = expected_df.reset_index(drop=True)
+
+    assert_frame_equal(result, expected_df, check_dtype=False)
+
+
+def test_null_values_filter_no_nulls(nodes_data_range):
+    """Test with a DataFrame containing no null values."""
+    df = pd.DataFrame({
+        'tag': ['temp', 'pressure'],
+        'name': ['temp', 'pressure'],
+        'value': [25, 100],
+        'timestamp': pd.date_range(start='2023-01-01', periods=2)
+    })
+    result = null_values_filter(df, nodes_data_range)
+    assert result.empty
+    assert list(result.columns) == ['tag', 'name', 'value', 'timestamp']
+
+
+def test_null_values_filter_empty_df(nodes_data_range):
+    """Test with an empty DataFrame."""
+    df = pd.DataFrame(columns=['tag', 'name', 'value', 'timestamp'])
+    result = null_values_filter(df, nodes_data_range)
+    assert result.empty
+    assert list(result.columns) == ['tag', 'name', 'value', 'timestamp']

tests/workflow/sub_workflows/test_core_scouter.py

@@ -0,0 +1,136 @@
+from unittest.mock import AsyncMock, patch, call, ANY
+import pytest
+from scouter.workflow.sub_workflows.core_scouter import CoreScouter
+from scouter.activities.activities import Activities
+
+
+@pytest.fixture
+def core_scouter():
+    return CoreScouter()
+
+
+@pytest.mark.asyncio
+@patch('scouter.workflow.sub_workflows.core_scouter.workflow', new_callable=AsyncMock)
+async def test_core_scouter_workflow_success(mock_workflow, core_scouter):
+    mock_workflow.execute_local_activity_method.side_effect = [
+        'filtered_data', 'grouped_data', 'held_data']
+    await core_scouter.run(
+        input_data={
+            'workflow_name': 'test_workflow',
+            'schedule_name': 'test_schedule',
+            'model_name': 'test_model',
+            'model_id': 'test_model_id',
+            'data': 'test_data',
+            'trigger_laborious': False,
+            'filters': {'test_filter': 'test_value'},
+            'schema': 'test_schema',
+            'table_name': 'test_table',
+            'retention_time': 3600,
+            'model_tags': {}
+        }
+    )
+
+    mock_workflow.execute_local_activity_method.assert_has_calls([
+        call(
+            Activities.data_quality_gate,
+            {
+                'filters': {'test_filter': 'test_value'},
+                'data': 'test_data',
+                'model_tags': {}
+            },
+            retry_policy=ANY,
+            start_to_close_timeout=ANY
+        )])
+    mock_workflow.execute_local_activity_method.assert_has_calls([
+        call(
+            Activities.aggregate_data,
+            {
+                'data': 'filtered_data',
+                'model_tags': {}
+            },
+            retry_policy=ANY,
+            start_to_close_timeout=ANY
+        )])
+    mock_workflow.execute_local_activity_method.assert_has_calls([
+        call(
+            Activities.group_and_hold_data,
+            {
+                'workflow_name': 'test_workflow',
+                'schedule_name': 'test_schedule',
+                'data': 'grouped_data',
+                'model_id': 'test_model_id',
+                'retention_time': 3600
+            },
+            retry_policy=ANY,
+            start_to_close_timeout=ANY
+        )])
+
+    mock_workflow.execute_activity_method.assert_has_calls([
+        call(
+            Activities.export_data_to_postgres,
+            {
+                'schema': 'test_schema',
+                'table_name': 'test_table',
+                'data': 'held_data'},
+            retry_policy=ANY,
+            start_to_close_timeout=ANY
+        )
+    ])
+
+
+@pytest.mark.asyncio
+@patch('scouter.workflow.sub_workflows.core_scouter.workflow', new_callable=AsyncMock)
+async def test_core_scouter_workflow_with_empty_data(mock_workflow, core_scouter):
+    mock_workflow.execute_local_activity_method.return_value = {}
+    await core_scouter.run(
+        input_data={
+            'workflow_name': 'test_workflow',
+            'schedule_name': 'test_schedule',
+            'model_name': 'test_model',
+            'model_id': 'test_model_id',
+            'data': 'test_data',
+            'trigger_laborious': False,
+            'filters': {'test_filter': 'test_value'},
+            'schema': 'test_schema',
+            'table_name': 'test_table',
+            'retention_time': 3600,
+            'model_tags': {}
+        }
+    )
+
+    mock_workflow.execute_local_activity_method.assert_has_calls([
+        call(
+            Activities.data_quality_gate,
+            {
+                'filters': {'test_filter': 'test_value'},
+                'data': 'test_data',
+                'model_tags': {}
+            },
+            retry_policy=ANY,
+            start_to_close_timeout=ANY
+        )])
+    mock_workflow.execute_local_activity_method.assert_has_calls([
+        call(
+            Activities.aggregate_data,
+            {
+                'data': {},
+                'model_tags': {}
+            },
+            retry_policy=ANY,
+            start_to_close_timeout=ANY
+        )])
+    mock_workflow.execute_local_activity_method.assert_has_calls([
+        call(
+            Activities.group_and_hold_data,
+            {
+                'workflow_name': 'test_workflow',
+                'schedule_name': 'test_schedule',
+                'data': {},
+                'model_id': 'test_model_id',
+                'retention_time': 3600
+            },
+            retry_policy=ANY,
+            start_to_close_timeout=ANY
+        )])
+
+    assert mock_workflow.execute_local_activity_method.call_count == 3

tests/workflow/test_fake_data.py

@@ -0,0 +1,29 @@
+from unittest.mock import AsyncMock, patch, ANY
+from pytest import fixture, mark
+from scouter.workflow.fake_data import FakeData
+from scouter.activities.faker import Faker
+
+
+@fixture
+def fake_data():
+    return FakeData()
+
+
+@mark.asyncio
+@patch('scouter.workflow.fake_data.workflow', new_callable=AsyncMock)
+async def test_fake_data_workflow(mock_workflow, fake_data):
+    mock_workflow.execute_activity_method.return_value = None
+    await fake_data.run(
+        {
+            'topic': 'test_topic'
+        }
+    )
+
+    mock_workflow.execute_activity_method.assert_called_once_with(
+        Faker.generate_and_send_data,
+        {
+            'topic': 'test_topic'
+        },
+        retry_policy=ANY,
+        start_to_close_timeout=ANY
+    )

tests/workflow/test_scouter.py

@@ -0,0 +1,38 @@
+from unittest.mock import AsyncMock, patch, ANY
+from pytest import fixture, mark
+from scouter.workflow.scouter import Scouter
+from scouter.activities.activities import Activities
+
+
+@fixture
+def scouter():
+    return Scouter()
+
+
+@mark.asyncio
+@patch('scouter.workflow.scouter.workflow', new_callable=AsyncMock)
+async def test_scouter_workflow(mock_workflow, scouter):
+
+    mock_workflow.execute_activity_method.return_value = 'test_data'
+    await scouter.run(
+        input_data={
+            'topic': 'test_topic'
+        }
+    )
+
+    mock_workflow.execute_activity_method.assert_called_once_with(
+        Activities.load_from_kafka,
+        {
+            'topic': 'test_topic'
+        },
+        retry_policy=ANY,
+        start_to_close_timeout=ANY
+    )
+
+    mock_workflow.execute_child_workflow.assert_called_once_with(
+        'core_scouter',
+        {
+            'topic': 'test_topic',
+            'data': 'test_data'
+        }
+    )