Function onEffect

packages/dva-core/test/effects.test.js:434–443

(effect, { put }, model, key)

        },
      },
      onEffect(effect, { put }, model, key) {
        expectedKey = key;
        modelNamespace = model.namespace;
        return function*(...args) {
          count *= 2;
          yield put({ type: SHOW });
          yield effect(...args);
          yield put({ type: HIDE });
        };
      },
    });

    app.use({