react-native/IntegrationTests/WebViewTest.js

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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
*/
'use strict';
const React = require('react');
const ReactNative = require('react-native');
const {WebView} = ReactNative;
const {TestModule} = ReactNative.NativeModules;
class WebViewTest extends React.Component {
render() {
let firstMessageReceived = false;
let secondMessageReceived = false;
function processMessage(e) {
const message = e.nativeEvent.data;
if (message === 'First') {
firstMessageReceived = true;
}
if (message === 'Second') {
secondMessageReceived = true;
}
// got both messages
if (firstMessageReceived && secondMessageReceived) {
TestModule.markTestPassed(true);
}
// wait for next message
else if (firstMessageReceived && !secondMessageReceived) {
return;
}
// first message got lost
else if (!firstMessageReceived && secondMessageReceived) {
throw new Error('First message got lost');
}
}
const html =
'Hello world' +
'<script>' +
"window.setTimeout(function(){window.postMessage('First'); window.postMessage('Second')}, 0)" +
'</script>';
// fail if messages didn't get through;
window.setTimeout(function() {
throw new Error(
firstMessageReceived
? 'Both messages got lost'
: 'Second message got lost',
);
}, 10000);
const source = {
html: html,
};
return (
<WebView
source={source}
onMessage={processMessage}
originWhitelist={['about:blank']}
/>
);
}
}
WebViewTest.displayName = 'WebViewTest';
module.exports = WebViewTest;