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b/tests/unit/test_main.py |
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import dataclasses |
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from ehrql.main import get_query_engine, open_output_file |
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@dataclasses.dataclass |
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class DummyQueryEngine: |
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dsn: str |
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backend: object |
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config: dict |
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@dataclasses.dataclass |
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class DefaultQueryEngine: |
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dsn: str |
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backend: object |
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config: dict |
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@dataclasses.dataclass |
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class DummyBackend: |
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config: dict |
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query_engine_class = DummyQueryEngine |
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def test_get_query_engine_defaults(): |
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query_engine = get_query_engine( |
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dsn=None, |
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backend_class=None, |
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query_engine_class=None, |
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environ={}, |
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default_query_engine_class=DefaultQueryEngine, |
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) |
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assert isinstance(query_engine, DefaultQueryEngine) |
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def test_get_query_engine_with_query_engine(): |
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query_engine = get_query_engine( |
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dsn=None, |
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backend_class=None, |
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query_engine_class=DummyQueryEngine, |
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environ={}, |
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default_query_engine_class=None, |
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) |
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assert isinstance(query_engine, DummyQueryEngine) |
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assert query_engine.backend is None |
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assert query_engine.config == {} |
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def test_get_query_engine_with_backend(): |
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query_engine = get_query_engine( |
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dsn=None, |
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backend_class=DummyBackend, |
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query_engine_class=None, |
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environ={"foo": "bar"}, |
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default_query_engine_class=None, |
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) |
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assert isinstance(query_engine, DummyQueryEngine) |
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assert isinstance(query_engine.backend, DummyBackend) |
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assert query_engine.config == {"foo": "bar"} |
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assert query_engine.backend.config == {"foo": "bar"} |
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def test_get_query_engine_with_backend_and_query_engine(): |
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query_engine = get_query_engine( |
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dsn=None, |
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backend_class=DummyBackend, |
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query_engine_class=DefaultQueryEngine, |
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environ={}, |
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default_query_engine_class=None, |
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) |
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assert isinstance(query_engine, DefaultQueryEngine) |
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assert isinstance(query_engine.backend, DummyBackend) |
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assert query_engine.config == {} |
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def test_open_output_file(tmp_path): |
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test_file = tmp_path / "testdir" / "file.txt" |
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with open_output_file(test_file) as f: |
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f.write("hello") |
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assert test_file.read_text() == "hello" |
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def test_open_output_file_with_stdout(capsys): |
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with open_output_file(None) as f: |
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f.write("hello") |
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assert capsys.readouterr().out == "hello" |