registerTestHandlers() — react Function Reference

Source Code

packages/react-native-renderer/src/__tests__/ResponderEventPlugin-test.internal.js lines 231–296

const registerTestHandlers = function (eventTestConfig, readableIDToID) {
  const runs = {dispatchCount: 0};
  const neverFire = function (readableID, registrationName) {
    runs.dispatchCount++;
    expect('').toBe(
      'Event type: ' +
        registrationName +
        '\nShould never occur on:' +
        readableID +
        '\nFor event test config:\n' +
        JSON.stringify(eventTestConfig) +
        '\n',
    );
  };

  const registerOneEventType = function (
    registrationName,
    eventTypeTestConfig,
  ) {
    for (const readableID in eventTypeTestConfig) {
      const nodeConfig = eventTypeTestConfig[readableID];
      const id = readableIDToID[readableID];
      const handler =
        nodeConfig.order === NA
          ? neverFire.bind(null, readableID, registrationName)
          : // We partially apply readableID and nodeConfig, as they change in the
            // parent closure across iterations.
            function (rID, config, e) {
              expect(
                rID +
                  '->' +
                  registrationName +
                  ' index:' +
                  runs.dispatchCount++,
              ).toBe(rID + '->' + registrationName + ' index:' + config.order);
              if (config.assertEvent) {
                config.assertEvent(e);
              }
              return config.returnVal;
            }.bind(null, readableID, nodeConfig);
      putListener(getInstanceFromNode(id), registrationName, handler);
    }
  };
  for (const eventName in eventTestConfig) {
    const oneEventTypeTestConfig = eventTestConfig[eventName];
    const hasTwoPhase = !!oneEventTypeTestConfig.bubbled;
    if (hasTwoPhase) {
      registerOneEventType(
        ResponderEventPlugin.eventTypes[eventName].phasedRegistrationNames
          .bubbled,
        oneEventTypeTestConfig.bubbled,
      );
      registerOneEventType(
        ResponderEventPlugin.eventTypes[eventName].phasedRegistrationNames
          .captured,
        oneEventTypeTestConfig.captured,
      );
    } else {
      registerOneEventType(
        ResponderEventPlugin.eventTypes[eventName].registrationName,
        oneEventTypeTestConfig,
      );
    }
  }
  return runs;
};