test_app_freed_on_zero_refcount() — flask Function Reference

Architecture documentation for the test_app_freed_on_zero_refcount() function in test_basic.py from the flask codebase.

Function python ApplicationCore AppLifeCycle

Entity Profile

ApplicationCore→ AppLifeCycle→ test_app_freed_on_zero_refcount() — flask Function Reference

Dependency Diagram

graph TD
  22a0fbb7_79aa_ff4e_782a_cea16633a601["test_app_freed_on_zero_refcount()"]
  85bc4fb5_d1d7_a135_020d_69e052c12c0f["test_basic.py"]
  22a0fbb7_79aa_ff4e_782a_cea16633a601 -->|defined in| 85bc4fb5_d1d7_a135_020d_69e052c12c0f
  style 22a0fbb7_79aa_ff4e_782a_cea16633a601 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

tests/test_basic.py lines 1937–1949

def test_app_freed_on_zero_refcount():
    # A Flask instance should not create a reference cycle that prevents CPython
    # from freeing it when all external references to it are released (see #3761).
    gc.disable()
    try:
        app = flask.Flask(__name__)
        assert app.view_functions["static"]
        weak = weakref.ref(app)
        assert weak() is not None
        del app
        assert weak() is None
    finally:
        gc.enable()