test_dependency_contextvars() — fastapi Function Reference

Architecture documentation for the test_dependency_contextvars() function in test_dependency_contextvars.py from the fastapi codebase.

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Dependency Diagram

graph TD
  30aa2c17_3f99_ea44_d79f_854674ce8d20["test_dependency_contextvars()"]
  e41999b9_ee75_d78c_cb43_68601b39ae25["test_dependency_contextvars.py"]
  30aa2c17_3f99_ea44_d79f_854674ce8d20 -->|defined in| e41999b9_ee75_d78c_cb43_68601b39ae25
  style 30aa2c17_3f99_ea44_d79f_854674ce8d20 fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

tests/test_dependency_contextvars.py lines 41–52

def test_dependency_contextvars():
    """
    Check that custom middlewares don't affect the contextvar context for dependencies.

    The code before yield and the code after yield should be run in the same contextvar
    context, so that request_state_context_var.reset(contextvar_token).

    If they are run in a different context, that raises an error.
    """
    response = client.get("/user")
    assert response.json() == "deadpond"
    assert response.headers["custom"] == "foo"