test_nested_callback_order() — flask Function Reference

Architecture documentation for the test_nested_callback_order() function in test_blueprints.py from the flask codebase.

Function python ApplicationCore ExtensionRegistry

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ApplicationCore→ ExtensionRegistry→ test_nested_callback_order() — flask Function Reference

Dependency Diagram

graph TD
  17e3e55e_2a16_098c_1acd_e05a57673404["test_nested_callback_order()"]
  4366a441_d387_52f9_ec8d_1c41c71c00a8["test_blueprints.py"]
  17e3e55e_2a16_098c_1acd_e05a57673404 -->|defined in| 4366a441_d387_52f9_ec8d_1c41c71c00a8
  style 17e3e55e_2a16_098c_1acd_e05a57673404 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

tests/test_blueprints.py lines 923–1000

def test_nested_callback_order(app, client):
    parent = flask.Blueprint("parent", __name__)
    child = flask.Blueprint("child", __name__)

    @app.before_request
    def app_before1():
        flask.g.setdefault("seen", []).append("app_1")

    @app.teardown_request
    def app_teardown1(e=None):
        assert flask.g.seen.pop() == "app_1"

    @app.before_request
    def app_before2():
        flask.g.setdefault("seen", []).append("app_2")

    @app.teardown_request
    def app_teardown2(e=None):
        assert flask.g.seen.pop() == "app_2"

    @app.context_processor
    def app_ctx():
        return dict(key="app")

    @parent.before_request
    def parent_before1():
        flask.g.setdefault("seen", []).append("parent_1")

    @parent.teardown_request
    def parent_teardown1(e=None):
        assert flask.g.seen.pop() == "parent_1"

    @parent.before_request
    def parent_before2():
        flask.g.setdefault("seen", []).append("parent_2")

    @parent.teardown_request
    def parent_teardown2(e=None):
        assert flask.g.seen.pop() == "parent_2"

    @parent.context_processor
    def parent_ctx():
        return dict(key="parent")

    @child.before_request
    def child_before1():
        flask.g.setdefault("seen", []).append("child_1")

    @child.teardown_request
    def child_teardown1(e=None):
        assert flask.g.seen.pop() == "child_1"

    @child.before_request
    def child_before2():
        flask.g.setdefault("seen", []).append("child_2")

    @child.teardown_request
    def child_teardown2(e=None):
        assert flask.g.seen.pop() == "child_2"

    @child.context_processor
    def child_ctx():
        return dict(key="child")

    @child.route("/a")
    def a():
        return ", ".join(flask.g.seen)

    @child.route("/b")
    def b():
        return flask.render_template_string("{{ key }}")

    parent.register_blueprint(child)
    app.register_blueprint(parent)
    assert (
        client.get("/a").data == b"app_1, app_2, parent_1, parent_2, child_1, child_2"
    )
    assert client.get("/b").data == b"child"