SIENTIAPDE-1241: Add unit tests for Activities class and enhance validation script with fix and test options

This commit introduces a new test suite for the Activities class, achieving 100% coverage. Additionally, the validation script (validate.sh) is enhanced with new options:

- --fix: Automatically fixes code formatting and linting issues using Ruff.
- --only-tests: Runs only the unit tests, skipping other validation steps.

The validation script now also supports skipping tests and provides more informative output.

validate.sh

@@ -6,22 +6,38 @@
 #   ./validate.sh              # Run all checks including tests (default)
 #   ./validate.sh --no-tests   # Skip unit tests
 #   ./validate.sh --skip-tests # Skip unit tests (alias)
+#   ./validate.sh --only-tests # Run only unit tests
+#   ./validate.sh --fix        # Auto-fix formatting and linting, then run validations (no tests)
 
 set -e  # Exit on any error
 
 # Parse command line arguments
 RUN_TESTS=true
+ONLY_TESTS=false
+FIX_MODE=false
+
 for arg in "$@"; do
     case $arg in
         --no-tests|--skip-tests)
             RUN_TESTS=false
             shift
             ;;
+        --only-tests)
+            ONLY_TESTS=true
+            shift
+            ;;
+        --fix)
+            FIX_MODE=true
+            RUN_TESTS=false
+            shift
+            ;;
         --help|-h)
             echo "Usage: $0 [OPTIONS]"
             echo ""
             echo "Options:"
             echo "  --no-tests, --skip-tests    Skip unit tests (default: run tests)"
+            echo "  --only-tests                Run only unit tests"
+            echo "  --fix                       Auto-fix formatting and linting, then run validations (no tests)"
             echo "  --help, -h                  Show this help message"
             echo ""
             exit 0
@@ -46,7 +62,36 @@ echo -e "${BLUE}║  Model Manager - Code Validation Suite                ║${N
 echo -e "${BLUE}╚════════════════════════════════════════════════════════╝${NC}"
 echo ""
 
-if [ "$RUN_TESTS" = false ]; then
+# Handle --fix mode
+if [ "$FIX_MODE" = true ]; then
+    echo -e "${BLUE}🔧 Running auto-fix mode...${NC}"
+    echo ""
+    
+    echo -e "${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
+    echo -e "${BLUE}▶ Auto-fixing code formatting (Ruff)${NC}"
+    echo -e "${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
+    ruff format model_manager/ tests/
+    echo -e "${GREEN}✅ Code formatting applied${NC}"
+    echo ""
+    
+    echo -e "${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
+    echo -e "${BLUE}▶ Auto-fixing linting issues (Ruff)${NC}"
+    echo -e "${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
+    ruff check --fix model_manager/ tests/
+    echo -e "${GREEN}✅ Linting fixes applied${NC}"
+    echo ""
+    
+    echo -e "${YELLOW}ℹ️  Now running validations (without tests)...${NC}"
+    echo ""
+fi
+
+# Handle --only-tests mode
+if [ "$ONLY_TESTS" = true ]; then
+    echo -e "${BLUE}🧪 Running only unit tests...${NC}"
+    echo ""
+fi
+
+if [ "$RUN_TESTS" = false ] && [ "$ONLY_TESTS" = false ]; then
     echo -e "${YELLOW}ℹ️  Unit tests will be skipped${NC}"
     echo ""
 fi
@@ -81,37 +126,45 @@ run_step() {
 # Track failures
 FAILED_STEPS=()
 
-# Step 1: Code Formatting Check (Ruff)
-if ! run_step "1. Code Formatting (Ruff)" "ruff format --check model_manager/ tests/"; then
-    FAILED_STEPS+=("Code Formatting")
-fi
-
-# Step 2: Linting (Ruff)
-if ! run_step "2. Code Linting (Ruff)" "ruff check model_manager/ tests/"; then
-    FAILED_STEPS+=("Linting")
-fi
-
-# Step 3: Type Checking (mypy)
-if ! run_step "3. Type Checking (mypy)" "mypy model_manager/"; then
-    FAILED_STEPS+=("Type Checking")
-fi
-
-# Step 4: Security Analysis (Bandit)
-if ! run_step "4. Security Analysis (Bandit)" "bandit -r model_manager/ -ll -q"; then
-    FAILED_STEPS+=("Security Analysis")
-fi
-
-# Step 5: Unit Tests (pytest)
-if [ "$RUN_TESTS" = true ]; then
-    if ! run_step "5. Unit Tests (pytest)" "pytest tests/ --cov=model_manager --cov-report=term-missing --cov-report=xml --cov-report=html --cov-fail-under=80 -q"; then
+# Handle --only-tests mode
+if [ "$ONLY_TESTS" = true ]; then
+    # Step 5: Unit Tests (pytest)
+    if ! run_step "Unit Tests (pytest)" "pytest tests/ --cov=model_manager --cov-report=term-missing --cov-report=xml --cov-report=html --cov-fail-under=80 -q"; then
         FAILED_STEPS+=("Unit Tests")
     fi
 else
-    echo -e "${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
-    echo -e "${BLUE}▶ 5. Unit Tests (pytest)${NC}"
-    echo -e "${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
-    echo -e "${YELLOW}⏭️  Unit Tests - SKIPPED${NC}"
-    echo ""
+    # Step 1: Code Formatting Check (Ruff)
+    if ! run_step "1. Code Formatting (Ruff)" "ruff format --check model_manager/ tests/"; then
+        FAILED_STEPS+=("Code Formatting")
+    fi
+
+    # Step 2: Linting (Ruff)
+    if ! run_step "2. Code Linting (Ruff)" "ruff check model_manager/ tests/"; then
+        FAILED_STEPS+=("Linting")
+    fi
+
+    # Step 3: Type Checking (mypy)
+    if ! run_step "3. Type Checking (mypy)" "mypy model_manager/"; then
+        FAILED_STEPS+=("Type Checking")
+    fi
+
+    # Step 4: Security Analysis (Bandit)
+    if ! run_step "4. Security Analysis (Bandit)" "bandit -r model_manager/ -ll -q"; then
+        FAILED_STEPS+=("Security Analysis")
+    fi
+
+    # Step 5: Unit Tests (pytest)
+    if [ "$RUN_TESTS" = true ]; then
+        if ! run_step "5. Unit Tests (pytest)" "pytest tests/ --cov=model_manager --cov-report=term-missing --cov-report=xml --cov-report=html --cov-fail-under=80 -q"; then
+            FAILED_STEPS+=("Unit Tests")
+        fi
+    else
+        echo -e "${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
+        echo -e "${BLUE}▶ 5. Unit Tests (pytest)${NC}"
+        echo -e "${BLUE}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
+        echo -e "${YELLOW}⏭️  Unit Tests - SKIPPED${NC}"
+        echo ""
+    fi
 fi
 
 # Summary