wehub-resource-sync
109 lines
3.3 KiB
Python
109 lines
3.3 KiB
Python
import os
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from unittest.mock import MagicMock, patch
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import pytest
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from ray.tune.constants import RAY_TUNE_CALLBACKS_ENV_VAR
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from ray.tune.utils.callback import Callback, _initialize_env_callbacks
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class MockCallback(Callback):
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pass
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@pytest.mark.parametrize(
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"env_value,expected_callback_count",
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[
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("my.module.Callback1", 1),
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("module1.Callback1,module2.Callback2", 2),
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("", 0),
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(" ", 0),
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("module.Callback1, ,module.Callback2", 2),
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],
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)
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@patch("importlib.import_module")
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def test_env_callbacks_loading(mock_import, env_value, expected_callback_count):
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"""Test loading execution callbacks from environment variable with various inputs."""
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if env_value:
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with patch.dict(os.environ, {RAY_TUNE_CALLBACKS_ENV_VAR: env_value}):
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mock_module = MagicMock()
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mock_module.Callback1 = MockCallback
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mock_module.Callback2 = MockCallback
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mock_import.return_value = mock_module
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callbacks = _initialize_env_callbacks()
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assert len(callbacks) == expected_callback_count
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for callback in callbacks:
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assert isinstance(callback, MockCallback)
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else:
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with patch.dict(
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os.environ, {RAY_TUNE_CALLBACKS_ENV_VAR: env_value}, clear=True
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):
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callbacks = _initialize_env_callbacks()
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assert len(callbacks) == 0
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@pytest.mark.parametrize(
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"env_value,original_error_type",
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[
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("invalid_module", ValueError),
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("module.Class", TypeError),
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("module.NonExistentClass", AttributeError),
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],
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)
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@patch("importlib.import_module")
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def test_callback_loading_errors(mock_import, env_value, original_error_type):
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"""Test handling of various error conditions when loading callbacks."""
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with patch.dict(os.environ, {RAY_TUNE_CALLBACKS_ENV_VAR: env_value}):
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if "invalid_module" in env_value:
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pass
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elif "NonExistentClass" in env_value:
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mock_module = MagicMock()
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del mock_module.NonExistentClass
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mock_import.return_value = mock_module
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else:
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mock_module = MagicMock()
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class RegularClass:
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pass
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mock_module.Class = RegularClass
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mock_import.return_value = mock_module
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with pytest.raises(
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ValueError, match=f"Failed to import callback from '{env_value}'"
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) as exc_info:
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_initialize_env_callbacks()
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assert isinstance(exc_info.value.__cause__, original_error_type)
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def test_import_error_handling():
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"""Test handling of import errors when loading callbacks."""
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with patch.dict(
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os.environ, {RAY_TUNE_CALLBACKS_ENV_VAR: "nonexistent.module.TestCallback"}
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):
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with pytest.raises(
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ValueError,
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match="Failed to import callback from 'nonexistent.module.TestCallback'",
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) as exc_info:
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_initialize_env_callbacks()
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assert isinstance(exc_info.value.__cause__, ImportError)
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def test_no_env_variable():
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"""Test that no callbacks are loaded when environment variable is not set."""
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if RAY_TUNE_CALLBACKS_ENV_VAR in os.environ:
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del os.environ[RAY_TUNE_CALLBACKS_ENV_VAR]
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callbacks = _initialize_env_callbacks()
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assert len(callbacks) == 0
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if __name__ == "__main__":
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import sys
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sys.exit(pytest.main(["-v", __file__]))
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