feat: add date validation and resolution for results endpoint

tests/api/test_results_v2.py

@@ -0,0 +1,61 @@
+"""Tests for results_v2 endpoint date validation."""
+
+import pytest
+from datetime import datetime, timedelta
+from api.routes.results_v2 import validate_and_resolve_dates
+
+
+def test_validate_no_dates_provided():
+    """Test default to last 30 days when no dates provided."""
+    start, end = validate_and_resolve_dates(None, None)
+
+    # Should default to last 30 days
+    end_dt = datetime.strptime(end, "%Y-%m-%d")
+    start_dt = datetime.strptime(start, "%Y-%m-%d")
+
+    assert (end_dt - start_dt).days == 30
+    assert end_dt.date() <= datetime.now().date()
+
+
+def test_validate_only_start_date():
+    """Test single date when only start_date provided."""
+    start, end = validate_and_resolve_dates("2025-01-16", None)
+
+    assert start == "2025-01-16"
+    assert end == "2025-01-16"
+
+
+def test_validate_only_end_date():
+    """Test single date when only end_date provided."""
+    start, end = validate_and_resolve_dates(None, "2025-01-16")
+
+    assert start == "2025-01-16"
+    assert end == "2025-01-16"
+
+
+def test_validate_both_dates():
+    """Test date range when both provided."""
+    start, end = validate_and_resolve_dates("2025-01-16", "2025-01-20")
+
+    assert start == "2025-01-16"
+    assert end == "2025-01-20"
+
+
+def test_validate_invalid_date_format():
+    """Test error on invalid date format."""
+    with pytest.raises(ValueError, match="Invalid date format"):
+        validate_and_resolve_dates("2025-1-16", "2025-01-20")
+
+
+def test_validate_start_after_end():
+    """Test error when start_date > end_date."""
+    with pytest.raises(ValueError, match="start_date must be <= end_date"):
+        validate_and_resolve_dates("2025-01-20", "2025-01-16")
+
+
+def test_validate_future_date():
+    """Test error when dates are in future."""
+    future = (datetime.now() + timedelta(days=10)).strftime("%Y-%m-%d")
+
+    with pytest.raises(ValueError, match="Cannot query future dates"):
+        validate_and_resolve_dates(future, future)