# tests/unit/test_metrics.py

import pytest
from prometheus_client import Counter, Gauge, Histogram
import scouter.metrics as metrics

# --- Test Functions for Each Metric (Corrected for v0.22.0 _name behavior) ---


def test_scouter_laborious_data_written_count():
    """Verify the definition of LABORIOUS_DATA_WRITTEN_COUNT."""
    assert metrics.LABORIOUS_DATA_WRITTEN_COUNT is not None
    assert isinstance(metrics.LABORIOUS_DATA_WRITTEN_COUNT, Counter)
    assert metrics.LABORIOUS_DATA_WRITTEN_COUNT._name == "scouter_laborious_data_written_count"
    assert set(metrics.LABORIOUS_DATA_WRITTEN_COUNT._labelnames) == {
        "pod_id", "model_name", "pipeline_name"}


def test_scouter_tag_changes_monitor():
    """Verify the definition of TAG_CHANGES_MONITOR."""
    assert metrics.TAG_CHANGES_MONITOR is not None
    assert isinstance(metrics.TAG_CHANGES_MONITOR, Gauge)
    assert metrics.TAG_CHANGES_MONITOR._name == "scouter_tag_changes_monitor"
    assert set(metrics.TAG_CHANGES_MONITOR._labelnames) == {
        "pod_id", "model_name", "pipeline_name", "tag_name"}