react-native/IntegrationTests/AppEventsTest.js

72 lines
1.6 KiB
JavaScript

/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
*/
'use strict';
var React = require('react');
var ReactNative = require('react-native');
var {
NativeAppEventEmitter,
StyleSheet,
Text,
View,
} = ReactNative;
var { TestModule } = ReactNative.NativeModules;
var deepDiffer = require('deepDiffer');
var TEST_PAYLOAD = {foo: 'bar'};
type AppEvent = { data: Object, ts: number, };
type State = {
sent: 'none' | AppEvent,
received: 'none' | AppEvent,
elapsed?: string,
};
class AppEventsTest extends React.Component<{}, State> {
state: State = {sent: 'none', received: 'none'};
componentDidMount() {
NativeAppEventEmitter.addListener('testEvent', this.receiveEvent);
var event = {data: TEST_PAYLOAD, ts: Date.now()};
TestModule.sendAppEvent('testEvent', event);
this.setState({sent: event});
}
receiveEvent = (event: any) => {
if (deepDiffer(event.data, TEST_PAYLOAD)) {
throw new Error('Received wrong event: ' + JSON.stringify(event));
}
var elapsed = (Date.now() - event.ts) + 'ms';
this.setState({received: event, elapsed}, () => {
TestModule.markTestCompleted();
});
};
render() {
return (
<View style={styles.container}>
<Text>
{JSON.stringify(this.state, null, ' ')}
</Text>
</View>
);
}
}
AppEventsTest.displayName = 'AppEventsTest';
var styles = StyleSheet.create({
container: {
margin: 40,
},
});
module.exports = AppEventsTest;