Merge branch 'master' into shirakaba/updatable-user-scripts

README.md

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 [![All Contributors](https://img.shields.io/badge/all_contributors-16-orange.svg?style=flat-square)](#contributors)
 [![Known Vulnerabilities](https://snyk.io/test/github/react-native-community/react-native-webview/badge.svg?style=flat-square)](https://snyk.io/test/github/react-native-community/react-native-webview)
-<a href="https://www.npmjs.com/package/react-native-webview"><img src="https://img.shields.io/npm/v/react-native-webview.svg"></a>
+[![NPM Version](https://img.shields.io/npm/v/react-native-webview.svg?style=flat-square)](https://www.npmjs.com/package/react-native-webview)
+[![Lean Core Extracted](https://img.shields.io/badge/Lean%20Core-Extracted-brightgreen.svg?style=flat-square)][lean-core-issue]
 
 **React Native WebView** is a modern, well-supported, and cross-platform WebView for React Native. It is intended to be a replacement for the built-in WebView (which will be [removed from core](https://github.com/react-native-community/discussions-and-proposals/pull/3)).
 
 This readme is available in:
 
 - [Brazilian portuguese](docs/README.portuguese.md)
+
+[lean-core-issue]: https://github.com/facebook/react-native/issues/23313

ios/RNCWebView.m

 
   // Shim the HTML5 history API:
   [wkWebViewConfig.userContentController addScriptMessageHandler:[[RNCWeakScriptMessageDelegate alloc] initWithDelegate:self]
-                                                            name:HistoryShimName];
 
   [self resetupScripts:wkWebViewConfig];
 

package.json

     "Thibault Malbranche <malbranche.thibault@gmail.com>"
   ],
   "license": "MIT",
-  "version": "8.0.2",
+  "version": "8.0.3",
   "homepage": "https://github.com/react-native-community/react-native-webview#readme",
   "scripts": {
     "ci": "CI=true && yarn lint && yarn test",

src/WebViewShared.tsx

     const { url, lockIdentifier } = nativeEvent;
 
     if (!passesWhitelist(compileWhitelist(originWhitelist), url)) {
-      Linking.openURL(url);
+      Linking.canOpenURL(url).then((supported) => {
+        if (supported) {
+          return Linking.openURL(url);
+        }
+        console.warn(`Can't open url: ${url}`);
+        return undefined;
+      }).catch(e => {
+        console.warn('Error opening URL: ', e);
+      });
       shouldStart = false;
-    }
-
-    if (onShouldStartLoadWithRequest) {
+    } else if (onShouldStartLoadWithRequest) {
       shouldStart = onShouldStartLoadWithRequest(nativeEvent);
     }
 

src/__tests__/WebViewShared-test.js

   createOnShouldStartLoadWithRequest,
 } from '../WebViewShared';
 
+Linking.openURL.mockResolvedValue(undefined);
+Linking.canOpenURL.mockResolvedValue(true);
+
+// The tests that call createOnShouldStartLoadWithRequest will cause a promise
+// to get kicked off (by calling the mocked `Linking.canOpenURL`) that the tests
+// _need_ to get run to completion _before_ doing any `expect`ing. The reason
+// is: once that promise is resolved another function should get run which will
+// call `Linking.openURL`, and we want to test that.
+//
+// Normally we would probably do something like `await
+// createShouldStartLoadWithRequest(...)` in the tests, but that doesn't work
+// here because the promise that gets kicked off is not returned (because
+// non-test code doesn't need to know about it).
+//
+// The tests thus need a way to "flush any pending promises" (to make sure
+// pending promises run to completion) before doing any `expect`ing. `jest`
+// doesn't provide a way to do this out of the box, but we can use this function
+// to do it.
+//
+// See this issue for more discussion: https://github.com/facebook/jest/issues/2157
+function flushPromises() {
+  return new Promise(resolve => setImmediate(resolve));
+}
+
+
 describe('WebViewShared', () => {
   test('exports defaultOriginWhitelist', () => {
     expect(defaultOriginWhitelist).toMatchSnapshot();
 
     const loadRequest = jest.fn();
 
-    test('loadRequest is called without onShouldStartLoadWithRequest override', () => {
+    test('loadRequest is called without onShouldStartLoadWithRequest override', async () => {
       const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
         loadRequest,
         defaultOriginWhitelist,
       );
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'https://www.example.com/', lockIdentifier: 1 } });
+      
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenCalledTimes(0);
       expect(loadRequest).toHaveBeenCalledWith(true, 'https://www.example.com/', 1);
     });
 
-    test('Linking.openURL is called without onShouldStartLoadWithRequest override', () => {
+    test('Linking.openURL is called without onShouldStartLoadWithRequest override', async () => {
       const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
         loadRequest,
         defaultOriginWhitelist,
       );
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'invalid://example.com/', lockIdentifier: 2 } });
+      
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenCalledWith('invalid://example.com/');
       expect(loadRequest).toHaveBeenCalledWith(false, 'invalid://example.com/', 2);
     });
 
-    test('loadRequest with true onShouldStartLoadWithRequest override is called', () => {
+    test('loadRequest with true onShouldStartLoadWithRequest override is called', async () => {
       const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
         loadRequest,
         defaultOriginWhitelist,
       );
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'https://www.example.com/', lockIdentifier: 1 } });
+
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenCalledTimes(0);
       expect(loadRequest).toHaveBeenLastCalledWith(true, 'https://www.example.com/', 1);
     });
 
-    test('Linking.openURL with true onShouldStartLoadWithRequest override is called for links not passing the whitelist', () => {
+    test('Linking.openURL with true onShouldStartLoadWithRequest override is called for links not passing the whitelist', async () => {
       const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
         loadRequest,
         defaultOriginWhitelist,
         alwaysTrueOnShouldStartLoadWithRequest,
       );
 
+      var a = 10;
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'invalid://example.com/', lockIdentifier: 1 } });
+
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenLastCalledWith('invalid://example.com/');
-      expect(loadRequest).toHaveBeenLastCalledWith(true, 'invalid://example.com/', 1);
+      // We don't expect the URL to have been loaded in the WebView because it
+      // is not in the origin whitelist
+      expect(loadRequest).toHaveBeenLastCalledWith(false, 'invalid://example.com/', 1);
     });
 
-    test('loadRequest with false onShouldStartLoadWithRequest override is called', () => {
+    test('loadRequest with false onShouldStartLoadWithRequest override is called', async () => {
       const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
         loadRequest,
         defaultOriginWhitelist,
       );
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'https://www.example.com/', lockIdentifier: 1 } });
+
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenCalledTimes(0);
       expect(loadRequest).toHaveBeenLastCalledWith(false, 'https://www.example.com/', 1);
     });
 
-    test('loadRequest with limited whitelist', () => {
+    test('loadRequest with limited whitelist', async () => {
       const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
         loadRequest,
         ['https://*'],
       );
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'https://www.example.com/', lockIdentifier: 1 } });
+      
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenCalledTimes(0);
       expect(loadRequest).toHaveBeenLastCalledWith(true, 'https://www.example.com/', 1);
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'http://insecure.com/', lockIdentifier: 2 } });
+
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenLastCalledWith('http://insecure.com/');
       expect(loadRequest).toHaveBeenLastCalledWith(false, 'http://insecure.com/', 2);
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'git+https://insecure.com/', lockIdentifier: 3 } });
+      
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenLastCalledWith('git+https://insecure.com/');
       expect(loadRequest).toHaveBeenLastCalledWith(false, 'git+https://insecure.com/', 3);
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'fakehttps://insecure.com/', lockIdentifier: 4 } });
+      
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenLastCalledWith('fakehttps://insecure.com/');
       expect(loadRequest).toHaveBeenLastCalledWith(false, 'fakehttps://insecure.com/', 4);
     });
 
-    test('loadRequest allows for valid URIs', () => {
+    test('loadRequest allows for valid URIs', async () => {
       const onShouldStartLoadWithRequest = createOnShouldStartLoadWithRequest(
           loadRequest,
           ['plus+https://*', 'DOT.https://*', 'dash-https://*', '0invalid://*', '+invalid://*'],
       );
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'plus+https://www.example.com/', lockIdentifier: 1 } });
+      
+      await flushPromises();
       expect(Linking.openURL).toHaveBeenCalledTimes(0);
       expect(loadRequest).toHaveBeenLastCalledWith(true, 'plus+https://www.example.com/', 1);
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'DOT.https://www.example.com/', lockIdentifier: 2 } });
+
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenCalledTimes(0);
       expect(loadRequest).toHaveBeenLastCalledWith(true, 'DOT.https://www.example.com/', 2);
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'dash-https://www.example.com/', lockIdentifier: 3 } });
+      
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenCalledTimes(0);
       expect(loadRequest).toHaveBeenLastCalledWith(true, 'dash-https://www.example.com/', 3);
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: '0invalid://www.example.com/', lockIdentifier: 4 } });
+
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenLastCalledWith('0invalid://www.example.com/');
       expect(loadRequest).toHaveBeenLastCalledWith(false, '0invalid://www.example.com/', 4);
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: '+invalid://www.example.com/', lockIdentifier: 5 } });
+      
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenLastCalledWith('+invalid://www.example.com/');
       expect(loadRequest).toHaveBeenLastCalledWith(false, '+invalid://www.example.com/', 5);
 
       onShouldStartLoadWithRequest({ nativeEvent: { url: 'FAKE+plus+https://www.example.com/', lockIdentifier: 6 } });
+
+      await flushPromises();
+
       expect(Linking.openURL).toHaveBeenLastCalledWith('FAKE+plus+https://www.example.com/');
       expect(loadRequest).toHaveBeenLastCalledWith(false, 'FAKE+plus+https://www.example.com/', 6);
     });