test_json_customization() — flask Function Reference

Architecture documentation for the test_json_customization() function in test_json.py from the flask codebase.

Function python ApplicationKernel Configuration calls 2

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ApplicationKernel→ Configuration→ test_json_customization() — flask Function Reference

Dependency Diagram

graph TD
  19555bad_e537_3fd6_8527_e6bcfd3a9379["test_json_customization()"]
  b6432813_8c45_5dc1_5241_b6184964d73b["test_json.py"]
  19555bad_e537_3fd6_8527_e6bcfd3a9379 -->|defined in| b6432813_8c45_5dc1_5241_b6184964d73b
  53777e07_54e8_db27_cec1_bad2487dcc8a["object_hook()"]
  19555bad_e537_3fd6_8527_e6bcfd3a9379 -->|calls| 53777e07_54e8_db27_cec1_bad2487dcc8a
  9f9b575f_e4c6_4dfb_af7d_18c05f7240a9["loads()"]
  19555bad_e537_3fd6_8527_e6bcfd3a9379 -->|calls| 9f9b575f_e4c6_4dfb_af7d_18c05f7240a9
  style 19555bad_e537_3fd6_8527_e6bcfd3a9379 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

tests/test_json.py lines 223–257

def test_json_customization(app, client):
    class X:  # noqa: B903, for Python2 compatibility
        def __init__(self, val):
            self.val = val

    def default(o):
        if isinstance(o, X):
            return f"<{o.val}>"

        return DefaultJSONProvider.default(o)

    class CustomProvider(DefaultJSONProvider):
        def object_hook(self, obj):
            if len(obj) == 1 and "_foo" in obj:
                return X(obj["_foo"])

            return obj

        def loads(self, s, **kwargs):
            kwargs.setdefault("object_hook", self.object_hook)
            return super().loads(s, **kwargs)

    app.json = CustomProvider(app)
    app.json.default = default

    @app.route("/", methods=["POST"])
    def index():
        return flask.json.dumps(flask.request.get_json()["x"])

    rv = client.post(
        "/",
        data=flask.json.dumps({"x": {"_foo": 42}}),
        content_type="application/json",
    )
    assert rv.data == b'"<42>"'