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42 lines
1.5 KiB
Python
42 lines
1.5 KiB
Python
# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
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#
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# SPDX-License-Identifier: Apache-2.0
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import sys
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from unittest.mock import patch
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from haystack.lazy_imports import LazyImport
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def test_lazy_importer_avoids_importing_unused_modules():
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# Save the original state of the module if it exists
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original_imported = sys.modules.get("haystack.components.generators.chat.azure")
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with patch.dict(sys.modules):
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# Remove the module from sys.modules if it was already imported
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if original_imported:
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del sys.modules["haystack.components.generators.chat.azure"]
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from haystack.components.generators.chat import OpenAIChatGenerator # Import the intended class # noqa: F401
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assert "haystack.components.generators.chat.openai" in sys.modules.keys()
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assert "haystack.components.generators.chat.azure" not in sys.modules.keys()
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# Restore the module if it was previously imported (preserves test isolation)
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if original_imported:
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sys.modules["haystack.components.generators.chat.azure"] = original_imported
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def test_import_error_is_suppressed_and_deferred():
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with LazyImport() as lazy_import:
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import a_module # noqa: F401
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assert lazy_import._deferred is not None
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exc_value, message = lazy_import._deferred
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assert isinstance(exc_value, ImportError)
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expected_message = (
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"Haystack failed to import the optional dependency 'a_module'. Try 'pip install a_module'. "
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"Original error: No module named 'a_module'"
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)
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assert expected_message in message
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