tests: add unit tests for query type functions in schemas.py (#281)

- test is_valid_query_type() for valid, invalid, empty, and case-sensitive inputs
- test str_to_query_type() for correct conversion and ValueError on invalid input
- test try_str_to_query_type() for fallback to MULTI and warning log on invalid input

Closes #277

Co-authored-by: Bervianto Leo Pratama <[email protected]>

Author: Nikitaa104

chatbot-core/tests/unit/models/__init__.py

@@ -0,0 +1,93 @@
+"""Unit tests for query type utility functions in api/models/schemas.py."""
+import pytest
+from api.models.schemas import (
+    QueryType,
+    is_valid_query_type,
+    str_to_query_type,
+    try_str_to_query_type,
+)
+
+
+def test_is_valid_query_type_returns_true_for_simple():
+    """Test that is_valid_query_type returns True for SIMPLE."""
+    assert is_valid_query_type("SIMPLE") is True
+
+
+def test_is_valid_query_type_returns_true_for_multi():
+    """Test that is_valid_query_type returns True for MULTI."""
+    assert is_valid_query_type("MULTI") is True
+
+
+def test_is_valid_query_type_returns_false_for_invalid():
+    """Test that is_valid_query_type returns False for invalid strings."""
+    assert is_valid_query_type("INVALID") is False
+
+
+def test_is_valid_query_type_returns_false_for_empty_string():
+    """Test that is_valid_query_type returns False for empty string."""
+    assert is_valid_query_type("") is False
+
+
+def test_is_valid_query_type_case_sensitive():
+    """Test that is_valid_query_type is case sensitive."""
+    assert is_valid_query_type("simple") is False
+    assert is_valid_query_type("multi") is False
+
+
+def test_str_to_query_type_converts_simple():
+    """Test that str_to_query_type converts SIMPLE to QueryType.SIMPLE."""
+    assert str_to_query_type("SIMPLE") == QueryType.SIMPLE
+
+
+def test_str_to_query_type_converts_multi():
+    """Test that str_to_query_type converts MULTI to QueryType.MULTI."""
+    assert str_to_query_type("MULTI") == QueryType.MULTI
+
+
+def test_str_to_query_type_raises_value_error_for_invalid():
+    """Test that str_to_query_type raises ValueError for invalid input."""
+    with pytest.raises(ValueError, match="Invalid query type: UNKNOWN"):
+        str_to_query_type("UNKNOWN")
+
+
+def test_str_to_query_type_raises_value_error_for_empty():
+    """Test that str_to_query_type raises ValueError for empty string."""
+    with pytest.raises(ValueError):
+        str_to_query_type("")
+
+
+def test_try_str_to_query_type_returns_simple(mocker):
+    """Test that try_str_to_query_type returns SIMPLE for valid input."""
+    mock_logger = mocker.MagicMock()
+    result = try_str_to_query_type("SIMPLE", mock_logger)
+    assert result == QueryType.SIMPLE
+    mock_logger.info.assert_not_called()
+
+
+def test_try_str_to_query_type_returns_multi(mocker):
+    """Test that try_str_to_query_type returns MULTI for valid input."""
+    mock_logger = mocker.MagicMock()
+    result = try_str_to_query_type("MULTI", mock_logger)
+    assert result == QueryType.MULTI
+    mock_logger.info.assert_not_called()
+
+
+def test_try_str_to_query_type_falls_back_to_multi_on_invalid(mocker):
+    """Test that try_str_to_query_type falls back to MULTI for invalid input."""
+    mock_logger = mocker.MagicMock()
+    result = try_str_to_query_type("INVALID", mock_logger)
+    assert result == QueryType.MULTI
+
+
+def test_try_str_to_query_type_logs_warning_on_invalid(mocker):
+    """Test that try_str_to_query_type logs a warning for invalid input."""
+    mock_logger = mocker.MagicMock()
+    try_str_to_query_type("INVALID", mock_logger)
+    mock_logger.info.assert_called_once()
+
+
+def test_try_str_to_query_type_falls_back_on_empty_string(mocker):
+    """Test that try_str_to_query_type falls back to MULTI for empty string."""
+    mock_logger = mocker.MagicMock()
+    result = try_str_to_query_type("", mock_logger)
+    assert result == QueryType.MULTI