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browser.test.ts
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browser.test.ts
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import { expect } from 'chai';
import { stubMethod } from 'hanbi';
import { createTestServer, expectIncludes } from '@web/dev-server-core/test-helpers';
import { Browser, HTTPResponse, launch as launchPuppeteer, Page } from 'puppeteer';
import { posix as pathUtil } from 'path';
import { hmrPlugin } from '../src/index';
import { mockFiles } from './utils';
function trackErrors(page: Page) {
const errors: any[] = [];
page.on('error', error => {
errors.push(error);
});
page.on('console', e => {
if (e.type() === 'error' || e.type() === 'warning') {
errors.push(e.text());
}
});
return errors;
}
describe('browser tests', function () {
this.timeout(10000);
let browser: Browser;
before(async () => {
browser = await launchPuppeteer();
});
after(async () => {
await browser.close();
});
it('should bubble when bubbles is true', async () => {
const { server, host } = await createTestServer({
rootDir: __dirname,
plugins: [
mockFiles({
'/foo.html': '<script src="/foo.js" type="module"></script>',
'/foo.js': `import '/bar.js'; import.meta.hot.accept();`,
'/bar.js': `import.meta.hot.accept({ bubbles: true })`,
}),
hmrPlugin(),
],
});
const { fileWatcher, webSockets } = server;
const stub = stubMethod(webSockets, 'send');
const page = await browser.newPage();
try {
await page.goto(`${host}/foo.html`, { waitUntil: 'networkidle0' });
fileWatcher.emit('change', pathUtil.join(__dirname, '/bar.js'));
expect(stub.callCount).to.equal(2);
expect(stub.getCall(0)!.args[0]).to.equal(
JSON.stringify({
type: 'hmr:update',
url: '/bar.js',
}),
);
expect(stub.getCall(1)!.args[0]).to.equal(
JSON.stringify({
type: 'hmr:update',
url: '/foo.js',
}),
);
} finally {
await page.close();
await server.stop();
}
});
it('should hot replace a module', async () => {
const files = {
'/foo.html': '<script src="/foo.js" type="module"></script>',
'/foo.js':
'import.meta.hot.accept(); document.body.appendChild(document.createTextNode(" a "));',
};
const { server, host } = await createTestServer({
rootDir: __dirname,
plugins: [mockFiles(files), hmrPlugin()],
});
const page = await browser.newPage();
const errors = trackErrors(page);
try {
await page.goto(`${host}/foo.html`, { waitUntil: 'networkidle0' });
expectIncludes(await page.content(), '<body> a </body>');
files['/foo.js'] = files['/foo.js'].replace('" a "', '" b "');
server.fileWatcher.emit('change', pathUtil.join(__dirname, '/foo.js'));
await page.waitForResponse((r: HTTPResponse) => r.url().startsWith(`${host}/foo.js`));
expectIncludes(await page.content(), '<body> a b </body>');
for (const error of errors) {
throw error;
}
} finally {
await page.close();
await server.stop();
}
});
it('should hot replace a bubbled module', async () => {
const files = {
'/foo.html': '<script src="/foo.js" type="module"></script>',
'/foo.js':
'import bar from "/bar.js"; import.meta.hot.accept(); document.body.appendChild(document.createTextNode(bar));',
'/bar.js': 'export default " a ";',
};
const { server, host } = await createTestServer({
rootDir: __dirname,
plugins: [mockFiles(files), hmrPlugin()],
});
const page = await browser.newPage();
const errors = trackErrors(page);
try {
await page.goto(`${host}/foo.html`, { waitUntil: 'networkidle0' });
expectIncludes(await page.content(), '<body> a </body>');
files['/bar.js'] = 'export default " b ";';
server.fileWatcher.emit('change', pathUtil.join(__dirname, '/bar.js'));
await page.waitForResponse((r: HTTPResponse) => r.url().startsWith(`${host}/bar.js`));
await new Promise(r => setTimeout(r, 1000));
expectIncludes(await page.content(), '<body> a b </body>');
for (const error of errors) {
throw error;
}
} finally {
await page.close();
await server.stop();
}
});
it('hot replaces multiple bubbled modules', async () => {
const files = {
'/foo.html': '<script type="module">import "/foo.js"; import "/bar.js";</script>',
'/foo.js':
'import baz from "/baz.js"; import.meta.hot.accept(); document.body.appendChild(document.createTextNode(" foo " + baz));',
'/bar.js':
'import baz from "/baz.js"; import.meta.hot.accept(); document.body.appendChild(document.createTextNode(" bar " + baz));',
'/baz.js': 'export default " a ";',
};
const { server, host } = await createTestServer({
rootDir: __dirname,
plugins: [mockFiles(files), hmrPlugin()],
});
const page = await browser.newPage();
const errors = trackErrors(page);
try {
await page.goto(`${host}/foo.html`, { waitUntil: 'networkidle0' });
// expectIncludes(await page.content(), '<body> foo a bar a </body>');
files['/baz.js'] = 'export default " b ";';
server.fileWatcher.emit('change', pathUtil.join(__dirname, '/baz.js'));
await Promise.all([
page.waitForResponse((r: HTTPResponse) => r.url().startsWith(`${host}/foo.js`)),
page.waitForResponse((r: HTTPResponse) => r.url().startsWith(`${host}/bar.js`)),
page.waitForResponse((r: HTTPResponse) => r.url().startsWith(`${host}/baz.js`)),
]);
await new Promise(r => setTimeout(r, 1000));
expectIncludes(await page.content(), '<body> foo a bar a foo b bar b </body>');
for (const error of errors) {
throw error;
}
} finally {
await page.close();
await server.stop();
}
});
it('reloads the page when a module has no hot replacable parent', async () => {
const files = {
'/foo.html':
'<script src="/foo.js" type="module"></script><script src="/baz.js" type="module"></script>',
'/foo.js':
'import bar from "/bar.js"; import.meta.hot.accept(); document.body.appendChild(document.createTextNode(bar));',
'/bar.js': 'export default " a ";',
'/baz.js': 'document.body.appendChild(document.createTextNode(" b "));',
};
const { server, host } = await createTestServer({
rootDir: __dirname,
plugins: [mockFiles(files), hmrPlugin()],
});
const page = await browser.newPage();
const errors = trackErrors(page);
try {
await page.goto(`${host}/foo.html`, { waitUntil: 'networkidle0' });
await page.evaluate('document.body.appendChild(document.createTextNode(" c "))');
expectIncludes(await page.content(), '<body> a b c </body>');
server.fileWatcher.emit('change', pathUtil.join(__dirname, '/baz.js'));
await page.waitForNavigation({ waitUntil: 'networkidle0' });
expectIncludes(await page.content(), '<body> a b </body>');
for (const error of errors) {
throw error;
}
} finally {
await page.close();
await server.stop();
}
});
});