electron/spec/api-web-frame-spec.ts

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import { expect } from 'chai';
import * as path from 'node:path';
import { BrowserWindow, ipcMain, WebContents } from 'electron/main';
import { defer } from './lib/spec-helpers';
import { once } from 'node:events';
describe('webFrame module', () => {
const fixtures = path.resolve(__dirname, 'fixtures');
it('can use executeJavaScript', async () => {
const w = new BrowserWindow({
show: false,
webPreferences: {
nodeIntegration: true,
contextIsolation: true,
preload: path.join(fixtures, 'pages', 'world-safe-preload.js')
}
});
defer(() => w.close());
const isSafe = once(ipcMain, 'executejs-safe');
w.loadURL('about:blank');
const [, wasSafe] = await isSafe;
expect(wasSafe).to.equal(true);
});
it('can use executeJavaScript and catch conversion errors', async () => {
const w = new BrowserWindow({
show: false,
webPreferences: {
nodeIntegration: true,
contextIsolation: true,
preload: path.join(fixtures, 'pages', 'world-safe-preload-error.js')
}
});
defer(() => w.close());
const execError = once(ipcMain, 'executejs-safe');
w.loadURL('about:blank');
const [, error] = await execError;
expect(error).to.not.equal(null, 'Error should not be null');
expect(error).to.have.property('message', 'Uncaught Error: An object could not be cloned.');
});
it('calls a spellcheck provider', async () => {
const w = new BrowserWindow({
show: false,
webPreferences: {
nodeIntegration: true,
contextIsolation: false
}
});
defer(() => w.close());
await w.loadFile(path.join(fixtures, 'pages', 'webframe-spell-check.html'));
w.focus();
await w.webContents.executeJavaScript('document.querySelector("input").focus()', true);
const spellCheckerFeedback =
new Promise<[string[], boolean]>(resolve => {
ipcMain.on('spec-spell-check', (e, words, callbackDefined) => {
if (words.length === 5) {
// The API calls the provider after every completed word.
// The promise is resolved only after this event is received with all words.
resolve([words, callbackDefined]);
}
});
});
const inputText = 'spleling test you\'re ';
for (const keyCode of inputText) {
w.webContents.sendInputEvent({ type: 'char', keyCode });
}
const [words, callbackDefined] = await spellCheckerFeedback;
expect(words.sort()).to.deep.equal(['spleling', 'test', 'you\'re', 'you', 're'].sort());
expect(callbackDefined).to.be.true();
});
describe('api', () => {
let w: WebContents;
before(async () => {
const win = new BrowserWindow({ show: false, webPreferences: { contextIsolation: false, nodeIntegration: true } });
await win.loadURL('about:blank');
w = win.webContents;
await w.executeJavaScript('webFrame = require(\'electron\').webFrame; null');
});
it('top is self for top frame', async () => {
const equal = await w.executeJavaScript('webFrame.top.context === webFrame.context');
expect(equal).to.be.true();
});
it('opener is null for top frame', async () => {
const equal = await w.executeJavaScript('webFrame.opener === null');
expect(equal).to.be.true();
});
it('firstChild is null for top frame', async () => {
const equal = await w.executeJavaScript('webFrame.firstChild === null');
expect(equal).to.be.true();
});
it('getFrameForSelector() does not crash when not found', async () => {
const equal = await w.executeJavaScript('webFrame.getFrameForSelector(\'unexist-selector\') === null');
expect(equal).to.be.true();
});
it('findFrameByName() does not crash when not found', async () => {
const equal = await w.executeJavaScript('webFrame.findFrameByName(\'unexist-name\') === null');
expect(equal).to.be.true();
});
it('findFrameByRoutingId() does not crash when not found', async () => {
const equal = await w.executeJavaScript('webFrame.findFrameByRoutingId(-1) === null');
expect(equal).to.be.true();
});
describe('executeJavaScript', () => {
before(() => {
w.executeJavaScript(`
childFrameElement = document.createElement('iframe');
document.body.appendChild(childFrameElement);
childFrame = webFrame.firstChild;
null
`);
});
after(() => {
w.executeJavaScript(`
childFrameElement.remove();
null
`);
});
it('executeJavaScript() yields results via a promise and a sync callback', async () => {
const { callbackResult, callbackError, result } = await w.executeJavaScript(`new Promise(resolve => {
let callbackResult, callbackError;
childFrame
.executeJavaScript('1 + 1', (result, error) => {
callbackResult = result;
callbackError = error;
}).then(result => resolve({callbackResult, callbackError, result}))
})`);
expect(callbackResult).to.equal(2);
expect(callbackError).to.be.undefined();
expect(result).to.equal(2);
});
it('executeJavaScriptInIsolatedWorld() yields results via a promise and a sync callback', async () => {
const { callbackResult, callbackError, result } = await w.executeJavaScript(`new Promise(resolve => {
let callbackResult, callbackError;
childFrame
.executeJavaScriptInIsolatedWorld(999, [{code: '1 + 1'}], (result, error) => {
callbackResult = result;
callbackError = error;
}).then(result => resolve({callbackResult, callbackError, result}))
})`);
expect(callbackResult).to.equal(2);
expect(callbackError).to.be.undefined();
expect(result).to.equal(2);
});
it('executeJavaScript() yields errors via a promise and a sync callback', async () => {
const { callbackResult, callbackError, error } = await w.executeJavaScript(`new Promise(resolve => {
let callbackResult, callbackError;
childFrame
.executeJavaScript('thisShouldProduceAnError()', (result, error) => {
callbackResult = result;
callbackError = error;
}).then(result => {throw new Error}, error => resolve({callbackResult, callbackError, error}))
})`);
expect(callbackResult).to.be.undefined();
expect(callbackError).to.be.an('error');
expect(error).to.be.an('error');
});
it('executeJavaScriptInIsolatedWorld() yields errors via a promise and a sync callback', async () => {
const { callbackResult, callbackError, error } = await w.executeJavaScript(`new Promise(resolve => {
let callbackResult, callbackError;
childFrame
.executeJavaScriptInIsolatedWorld(999, [{code: 'thisShouldProduceAnError()'}], (result, error) => {
callbackResult = result;
callbackError = error;
}).then(result => {throw new Error}, error => resolve({callbackResult, callbackError, error}))
})`);
expect(callbackResult).to.be.undefined();
expect(callbackError).to.be.an('error');
expect(error).to.be.an('error');
});
it('executeJavaScript(InIsolatedWorld) can be used without a callback', async () => {
expect(await w.executeJavaScript('webFrame.executeJavaScript(\'1 + 1\')')).to.equal(2);
expect(await w.executeJavaScript('webFrame.executeJavaScriptInIsolatedWorld(999, [{code: \'1 + 1\'}])')).to.equal(2);
});
});
});
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});