Fix tests

app/common/testSetup.js

@@ -2,3 +2,50 @@ import Adapter from 'enzyme-adapter-react-16';
 import Enzyme from 'enzyme';
 
 Enzyme.configure({ adapter: new Adapter() });
+
+jest.mock('react-native-fs', () => ({
+	CachesDirectoryPath: jest.fn(),
+	DocumentDirectoryPath: jest.fn(),
+	ExternalDirectoryPath: jest.fn(),
+	ExternalStorageDirectoryPath: jest.fn(),
+	LibraryDirectoryPath: jest.fn(),
+	MainBundlePath: 'testPath',
+	PicturesDirectoryPath: jest.fn(),
+	TemporaryDirectoryPath: jest.fn(),
+	appendFile: jest.fn(),
+	completeHandlerIOS: jest.fn(),
+	copyAssetsVideoIOS: jest.fn(),
+	copyFile: jest.fn(),
+	copyFileAssets: jest.fn(),
+	copyFileAssetsIOS: jest.fn(),
+	downloadFile: jest.fn(),
+	exists: jest.fn(),
+	existsAssets: jest.fn(),
+	getAllExternalFilesDirs: jest.fn(),
+	getFSInfo: jest.fn(),
+	hash: jest.fn(),
+	isResumable: jest.fn(),
+	mkdir: jest.fn(),
+	moveFile: jest.fn(),
+	pathForBundle: jest.fn(),
+	pathForGroup: jest.fn(),
+	read: jest.fn(),
+	readDir: jest.fn(),
+	readDirAssets: jest.fn(),
+	readFile: () =>
+		new Promise(resolve => {
+			resolve('console.log()');
+		}),
+	readFileAssets: jest.fn(),
+	readdir: jest.fn(),
+	resumeDownload: jest.fn(),
+	setReadable: jest.fn(),
+	stat: jest.fn(),
+	stopDownload: jest.fn(),
+	stopUpload: jest.fn(),
+	touch: jest.fn(),
+	unlink: jest.fn(),
+	uploadFiles: jest.fn(),
+	write: jest.fn(),
+	writeFile: jest.fn()
+}));

app/components/Browser/__snapshots__/index.test.js.snap

@@ -98,6 +98,8 @@ exports[`Browser should render correctly 1`] = `
   </Component>
   <WKWebView
     injectedJavaScriptForMainFrameOnly={true}
+    javaScriptEnabled={true}
+    onMessage={[Function]}
     onNavigationStateChange={[Function]}
     openNewWindowInWebView={true}
     source={

app/components/Browser/index.js

@@ -65,6 +65,7 @@ export default class Browser extends Component {
 	webview = React.createRef();
 
 	async componentDidMount() {
+		// TODO: The presence of this async statement breaks Jest code coverage
 		const entryScript = await RNFS.readFile(`${RNFS.MainBundlePath}/entry.js`, 'utf8');
 		this.setState({ entryScript });
 	}

app/components/Browser/index.test.js

@@ -1,6 +1,6 @@
 import React from 'react';
 import WKWebView from 'react-native-wkwebview-reborn';
-import { TextInput } from 'react-native';
+import { Alert, TextInput } from 'react-native';
 import { shallow } from 'enzyme';
 import Browser from './';
 
@@ -78,4 +78,27 @@ describe('Browser', () => {
 		wrapper.find('[name="refresh"]').simulate('press');
 		expect(stub).toBeCalled();
 	});
+
+	it('should show injection approval dialog', () => {
+		jest.mock('Alert', () => ({ alert: jest.fn() }));
+		const wrapper = shallow(<Browser defaultURL="http://metamask.io" />);
+		wrapper.find(WKWebView).simulate('Message', { nativeEvent: {} });
+		wrapper.find(WKWebView).simulate('Message', {
+			nativeEvent: {
+				data: { type: 'ETHEREUM_PROVIDER_REQUEST' }
+			}
+		});
+		expect(Alert.alert).toHaveBeenCalled();
+		jest.unmock('Alert');
+	});
+
+	it('should inject entry script after approval', () => {
+		const MockWebView = { evaluateJavaScript() {} }; // eslint-disable-line no-empty-function
+		const stub = spyOn(MockWebView, 'evaluateJavaScript');
+		const wrapper = shallow(<Browser defaultURL="http://metamask.io" />);
+		wrapper.instance().webview = { current: MockWebView };
+		wrapper.setState({ entryScript: 'console.log()' });
+		wrapper.instance().injectEntryScript();
+		expect(stub).toBeCalled();
+	});
 });