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build.test.js
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build.test.js
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const { join } = require('path');
const { access, readdir, readFile, writeFile } = require('fs').promises;
const looksLike = require('html-looks-like');
const { create, build } = require('./lib/cli');
const { snapshot } = require('./lib/utils');
const { subject } = require('./lib/output');
const images = require('./images/build');
const minimatch = require('minimatch');
const shell = require('shelljs');
const prerenderUrlFiles = [
'prerender-urls.json',
'prerender-urls.js',
'prerender-urls.promise.js',
];
async function getBody(dir, file = 'index.html') {
file = join(dir, `build/${file}`);
let html = await readFile(file, 'utf-8');
return html.match(/<body>.*<\/body>/)[0];
}
async function getHead(dir, file = 'index.html') {
file = join(dir, `build/${file}`);
let html = await readFile(file, 'utf-8');
return html.match(/<head>.*<\/head>/)[0];
}
function getRegExpFromMarkup(markup) {
const minifiedMarkup = markup
.replace(/\n/g, '')
.replace(/\t/g, '')
.replace(/\s{2}/g, '');
return new RegExp(minifiedMarkup);
}
function testMatch(received, expected) {
let receivedKeys = Object.keys(received);
let expectedKeys = Object.keys(expected);
expect(receivedKeys).toHaveLength(expectedKeys.length);
for (let key in expected) {
const receivedKey = receivedKeys.find(k => minimatch(k, key));
expect(key).toFindMatchingKey(receivedKey);
expect(receivedKey).toBeCloseInSize(received[receivedKey], expected[key]);
}
}
describe('preact build', () => {
it(`builds the 'default' template`, async () => {
let dir = await create('default');
await build(dir);
dir = join(dir, 'build');
let output = await snapshot(dir);
testMatch(output, images.default);
});
it(`builds the 'default' template with esm`, async () => {
let dir = await create('default');
await build(dir, { esm: true });
dir = join(dir, 'build');
let output = await snapshot(dir);
testMatch(output, images['default-esm']);
});
it(`builds the 'typescript' template`, async () => {
let dir = await create('typescript');
// The tsconfig.json in the template covers the test directory,
// so TS will error out if it can't find even test-only module definitions
shell.cd(dir);
shell.exec('npm i @types/enzyme enzyme-adapter-preact-pure');
expect(() => build(dir)).not.toThrow();
});
it('should use SASS styles', async () => {
let dir = await subject('sass');
await build(dir);
let body = await getBody(dir);
looksLike(body, images.sass);
});
it('should use custom `.babelrc`', async () => {
// app with custom .babelrc enabling async functions
let dir = await subject('custom-babelrc');
await build(dir);
const bundleFile = (await readdir(`${dir}/build`)).find(file =>
/bundle\.\w{5}\.js$/.test(file)
);
const transpiledChunk = await readFile(
`${dir}/build/${bundleFile}`,
'utf8'
);
// when tragetting only last 1 chrome version, babel preserves
// arrow function. So checking for the delay function code from delay function in
// https://github.com/preactjs/preact-cli/blob/master/packages/cli/tests/subjects/custom-babelrc/index.js
expect(transpiledChunk.includes('=>setTimeout')).toBe(true);
});
prerenderUrlFiles.forEach(prerenderUrls => {
it(`should prerender the routes provided with '${prerenderUrls}'`, async () => {
let dir = await subject('multiple-prerendering');
await build(dir, { prerenderUrls });
const body1 = await getBody(dir);
looksLike(body1, images.prerender.home);
const body2 = await getBody(dir, 'route66/index.html');
looksLike(body2, images.prerender.route);
const body3 = await getBody(dir, 'custom/index.html');
looksLike(body3, images.prerender.custom);
const head1 = await getHead(dir);
expect(head1).toEqual(
expect.stringMatching(getRegExpFromMarkup(images.prerender.heads.home))
);
const head2 = await getHead(dir, 'route66/index.html');
expect(head2).toEqual(
expect.stringMatching(
getRegExpFromMarkup(images.prerender.heads.route66)
)
);
const head3 = await getHead(dir, 'custom/index.html');
expect(head3).toEqual(
expect.stringMatching(
getRegExpFromMarkup(images.prerender.heads.custom)
)
);
});
});
prerenderUrlFiles.forEach(prerenderUrls => {
it(`should prerender the routes with data provided with '${prerenderUrls}' via provider`, async () => {
let dir = await subject('multiple-prerendering-with-provider');
await build(dir, { prerenderUrls });
const body1 = await getBody(dir);
looksLike(body1, images.prerender.home);
const body2 = await getBody(dir, 'route66/index.html');
looksLike(body2, images.prerender.route);
const body3 = await getBody(dir, 'custom/index.html');
looksLike(body3, images.prerender.custom);
const body4 = await getBody(dir, 'customhook/index.html');
looksLike(body4, images.prerender.customhook);
const body5 = await getBody(dir, 'htmlsafe/index.html');
looksLike(body5, images.prerender.htmlSafe);
const head1 = await getHead(dir);
expect(head1).toEqual(
expect.stringMatching(getRegExpFromMarkup(images.prerender.heads.home))
);
const head2 = await getHead(dir, 'route66/index.html');
expect(head2).toEqual(
expect.stringMatching(
getRegExpFromMarkup(images.prerender.heads.route66)
)
);
const head3 = await getHead(dir, 'custom/index.html');
expect(head3).toEqual(
expect.stringMatching(
getRegExpFromMarkup(images.prerender.heads.custom)
)
);
});
});
it('should preload correct files', async () => {
let dir = await subject('preload-chunks');
await build(dir, { preload: true });
const head1 = await getHead(dir);
expect(head1).toEqual(
expect.stringMatching(getRegExpFromMarkup(images.preload.head))
);
});
it('should use custom `preact.config.js`', async () => {
// app with stable output name via preact.config.js
let dir = await subject('custom-webpack');
await build(dir);
let stableOutput = join(dir, 'build/bundle.js');
expect(await access(stableOutput)).toBeUndefined();
});
it('should use custom `template.html`', async () => {
let dir = await subject('custom-template');
await build(dir);
let file = join(dir, 'build/index.html');
let html = await readFile(file, 'utf-8');
expect(html).toEqual(
expect.stringMatching(getRegExpFromMarkup(images.template))
);
});
it('should patch global location object', async () => {
let dir = await subject('location-patch');
expect(() => build(dir)).not.toThrow();
});
it('should import non-modules CSS even when side effects are false', async () => {
let dir = await subject('side-effect-css');
await build(dir);
let head = await getHead(dir);
expect(head).toEqual(
expect.stringMatching(getRegExpFromMarkup(images.sideEffectCss))
);
});
it('should copy resources from static to build directory', async () => {
let dir = await subject('static-root');
await build(dir);
let file = join(dir, 'build', '.htaccess');
expect(await access(file)).toBeUndefined();
});
it('should error out for invalid CLI argument', async () => {
let dir = await subject('custom-template');
const mockExit = jest.spyOn(process, 'exit').mockImplementation(() => {});
await expect(build(dir, { 'service-worker': false })).rejects.toEqual(
new Error('Invalid argument found.')
);
expect(mockExit).toHaveBeenCalledWith(1);
mockExit.mockRestore();
});
describe('Push manifest plugin', () => {
it('should produce correct default `push-manifest.json`', async () => {
let dir = await create('default');
await build(dir);
const manifest = await readFile(
`${dir}/build/push-manifest.json`,
'utf8'
);
expect(manifest).toEqual(
expect.stringMatching(getRegExpFromMarkup(images.pushManifest))
);
});
it('should produce correct default `push-manifest.json` with esm', async () => {
let dir = await create('default');
await build(dir, { esm: true });
const manifest = await readFile(
`${dir}/build/push-manifest.json`,
'utf8'
);
expect(manifest).toEqual(
expect.stringMatching(getRegExpFromMarkup(images.pushManifestEsm))
);
});
it('should produce correct `push-manifest.json` when expected values are missing', async () => {
// In this subject, there is no source CSS which means no CSS asset is output.
// In the past, this would result in `"undefined": { type: "style" ... }` being added to the manifest.
let dir = await subject('custom-webpack');
await build(dir);
const manifest = await readFile(
`${dir}/build/push-manifest.json`,
'utf8'
);
expect(manifest).not.toMatch(/"undefined"/);
});
// Issue #1675
it('should produce correct `push-manifest.json` when user configures output filenames', async () => {
let dir = await subject('custom-webpack');
const config = await readFile(`${dir}/preact.config.js`, 'utf8');
await writeFile(
`${dir}/preact.config.js`,
config.replace(
"config.output.filename = '[name].js'",
"config.output.filename = 'scripts/[name].js'"
)
);
await build(dir, { prerender: false });
const manifest = await readFile(
`${dir}/build/push-manifest.json`,
'utf8'
);
expect(manifest).toEqual(
expect.stringMatching(
getRegExpFromMarkup(images.pushManifestAlteredFilenames)
)
);
});
});
it('should use a custom `.env` with prefixed environment variables', async () => {
let dir = await subject('custom-dotenv');
await build(dir);
const bundleFile = (await readdir(`${dir}/build`)).find(file =>
/bundle\.\w{5}\.js$/.test(file)
);
const transpiledChunk = await readFile(
`${dir}/build/${bundleFile}`,
'utf8'
);
// "Hello World!" should replace 'process.env.PREACT_APP_MY_VARIABLE'
expect(transpiledChunk.includes('console.log("Hello World!")')).toBe(true);
});
});