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Entry.test.js
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Entry.test.js
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'use strict';
/* eslint-disable
import/order,
arrow-parens,
array-bracket-spacing
*/
const path = require('path');
const webpack = require('webpack');
const addEntries = require('../lib/utils/addEntries');
const config = require('./fixtures/simple-config/webpack.config');
const configEntryAsFunction = require('./fixtures/entry-as-function/webpack.config');
const normalize = (entry) => entry.split(path.sep).join('/');
describe('Entry', () => {
it('adds devServer entry points to a single entry point', () => {
const webpackOptions = Object.assign({}, config);
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.entry.length).toEqual(2);
expect(
normalize(webpackOptions.entry[0]).indexOf('client/index.js?') !== -1
).toBeTruthy();
expect(normalize(webpackOptions.entry[1])).toEqual('./foo.js');
});
it('adds devServer entry points to a multi-module entry point', () => {
const webpackOptions = Object.assign({}, config, {
entry: ['./foo.js', './bar.js'],
});
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.entry.length).toEqual(3);
expect(
normalize(webpackOptions.entry[0]).indexOf('client/index.js?') !== -1
).toBeTruthy();
expect(webpackOptions.entry[1]).toEqual('./foo.js');
expect(webpackOptions.entry[2]).toEqual('./bar.js');
});
it('adds devServer entry points to a multi entry point object', () => {
const webpackOptions = Object.assign({}, config, {
entry: {
foo: './foo.js',
bar: './bar.js',
},
});
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.entry.foo.length).toEqual(2);
expect(
normalize(webpackOptions.entry.foo[0]).indexOf('client/index.js?') !== -1
).toBeTruthy();
expect(webpackOptions.entry.foo[1]).toEqual('./foo.js');
expect(webpackOptions.entry.bar[1]).toEqual('./bar.js');
});
it('defaults to src if no entry point is given', () => {
const webpackOptions = {};
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.entry.length).toEqual(2);
expect(webpackOptions.entry[1]).toEqual('./src');
});
it('preserves dynamic entry points', (done) => {
let i = 0;
const webpackOptions = {
// simulate dynamic entry
entry: () => {
i += 1;
return `./src-${i}.js`;
},
};
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(typeof webpackOptions.entry).toEqual('function');
webpackOptions
.entry()
.then((entryFirstRun) =>
webpackOptions.entry().then((entrySecondRun) => {
expect(entryFirstRun.length).toEqual(2);
expect(entryFirstRun[1]).toEqual('./src-1.js');
expect(entrySecondRun.length).toEqual(2);
expect(entrySecondRun[1]).toEqual('./src-2.js');
done();
})
)
.catch(done);
});
it('preserves asynchronous dynamic entry points', (done) => {
let i = 0;
const webpackOptions = {
// simulate async dynamic entry
entry: () =>
new Promise((resolve) => {
i += 1;
resolve(`./src-${i}.js`);
}),
};
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(typeof webpackOptions.entry).toEqual('function');
webpackOptions
.entry()
.then((entryFirstRun) =>
webpackOptions.entry().then((entrySecondRun) => {
expect(entryFirstRun.length).toEqual(2);
expect(entryFirstRun[1]).toEqual('./src-1.js');
expect(entrySecondRun.length).toEqual(2);
expect(entrySecondRun[1]).toEqual('./src-2.js');
done();
})
)
.catch(done);
});
it("prepends webpack's hot reload client script", () => {
const webpackOptions = Object.assign({}, config, {
entry: {
app: './app.js',
},
});
const devServerOptions = {
hot: true,
};
addEntries(webpackOptions, devServerOptions);
const hotClientScript = webpackOptions.entry.app[1];
expect(
normalize(hotClientScript).includes('webpack/hot/dev-server')
).toBeTruthy();
expect(hotClientScript).toEqual(require.resolve(hotClientScript));
});
it("prepends webpack's hot-only client script", () => {
const webpackOptions = Object.assign({}, config, {
entry: {
app: './app.js',
},
});
const devServerOptions = {
hotOnly: true,
};
addEntries(webpackOptions, devServerOptions);
const hotClientScript = webpackOptions.entry.app[1];
expect(
normalize(hotClientScript).includes('webpack/hot/only-dev-server')
).toBeTruthy();
expect(hotClientScript).toEqual(require.resolve(hotClientScript));
});
it("doesn't add the HMR plugin if not hot and no plugins", () => {
const webpackOptions = Object.assign({}, config);
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect('plugins' in webpackOptions).toBeFalsy();
});
it("doesn't add the HMR plugin if not hot and empty plugins", () => {
const webpackOptions = Object.assign({}, config, { plugins: [] });
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.plugins).toEqual([]);
});
it("doesn't add the HMR plugin if not hot and some plugins", () => {
const existingPlugin1 = new webpack.BannerPlugin('happy birthday');
const existingPlugin2 = new webpack.DefinePlugin({ foo: 'bar' });
const webpackOptions = Object.assign({}, config, {
plugins: [existingPlugin1, existingPlugin2],
});
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.plugins).toEqual([existingPlugin1, existingPlugin2]);
});
it('adds the HMR plugin if hot', () => {
const existingPlugin = new webpack.BannerPlugin('bruce');
const webpackOptions = Object.assign({}, config, {
plugins: [existingPlugin],
});
const devServerOptions = { hot: true };
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.plugins).toEqual([
existingPlugin,
new webpack.HotModuleReplacementPlugin(),
]);
});
it('adds the HMR plugin if hot-only', () => {
const webpackOptions = Object.assign({}, config);
const devServerOptions = { hotOnly: true };
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.plugins).toEqual([
new webpack.HotModuleReplacementPlugin(),
]);
});
it("doesn't add the HMR plugin again if it's already there", () => {
const existingPlugin = new webpack.BannerPlugin('bruce');
const webpackOptions = Object.assign({}, config, {
plugins: [new webpack.HotModuleReplacementPlugin(), existingPlugin],
});
const devServerOptions = { hot: true };
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.plugins).toEqual([
new webpack.HotModuleReplacementPlugin(),
existingPlugin,
]);
});
it('can prevent duplicate entries from successive calls', () => {
const webpackOptions = Object.assign({}, config);
const devServerOptions = { hot: true };
addEntries(webpackOptions, devServerOptions);
addEntries(webpackOptions, devServerOptions);
expect(webpackOptions.entry.length).toEqual(3);
const result = webpackOptions.entry.filter((entry) =>
normalize(entry).includes('webpack/hot/dev-server')
);
expect(result.length).toEqual(1);
});
it('supports entry as Function', () => {
const webpackOptions = Object.assign({}, configEntryAsFunction);
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
expect(typeof webpackOptions.entry === 'function').toBe(true);
});
it('only prepends devServer entry points to web targets by default', () => {
const webpackOptions = [
Object.assign({}, config),
Object.assign({ target: 'web' }, config),
Object.assign({ target: 'webworker' }, config),
Object.assign({ target: 'node' }, config) /* index:3 */,
];
const devServerOptions = {};
addEntries(webpackOptions, devServerOptions);
// eslint-disable-next-line no-shadow
webpackOptions.forEach((webpackOptions, index) => {
const expectInline = index !== 3; /* all but the node target */
expect(webpackOptions.entry.length).toEqual(expectInline ? 2 : 1);
if (expectInline) {
expect(
normalize(webpackOptions.entry[0]).indexOf('client/index.js?') !== -1
).toBeTruthy();
}
expect(normalize(webpackOptions.entry[expectInline ? 1 : 0])).toEqual(
'./foo.js'
);
});
});
it('allows selecting compilations to inline the client into', () => {
const webpackOptions = [
Object.assign({}, config),
Object.assign({ target: 'web' }, config),
Object.assign({ name: 'only-include' }, config) /* index:2 */,
Object.assign({ target: 'node' }, config),
];
const devServerOptions = {
injectClient: (compilerConfig) => compilerConfig.name === 'only-include',
};
addEntries(webpackOptions, devServerOptions);
// eslint-disable-next-line no-shadow
webpackOptions.forEach((webpackOptions, index) => {
const expectInline = index === 2; /* only the "only-include" compiler */
expect(webpackOptions.entry.length).toEqual(expectInline ? 2 : 1);
if (expectInline) {
expect(
normalize(webpackOptions.entry[0]).indexOf('client/index.js?') !== -1
).toBeTruthy();
}
expect(normalize(webpackOptions.entry[expectInline ? 1 : 0])).toEqual(
'./foo.js'
);
});
});
it('when hot, prepends the hot runtime to all targets by default', () => {
const webpackOptions = [
Object.assign({ target: 'web' }, config),
Object.assign({ target: 'node' }, config),
];
const devServerOptions = {
// disable inlining the client so entry indexes match up
// and we can use the same assertions for both configs
injectClient: false,
hot: true,
};
addEntries(webpackOptions, devServerOptions);
// eslint-disable-next-line no-shadow
webpackOptions.forEach((webpackOptions) => {
expect(webpackOptions.entry.length).toEqual(2);
expect(
normalize(webpackOptions.entry[0]).includes('webpack/hot/dev-server')
).toBeTruthy();
expect(normalize(webpackOptions.entry[1])).toEqual('./foo.js');
});
});
it('allows selecting which compilations to inject the hot runtime into', () => {
const webpackOptions = [
Object.assign({ target: 'web' }, config),
Object.assign({ target: 'node' }, config),
];
const devServerOptions = {
injectHot: (compilerConfig) => compilerConfig.target === 'node',
hot: true,
};
addEntries(webpackOptions, devServerOptions);
// node target should have the client runtime but not the hot runtime
const webWebpackOptions = webpackOptions[0];
expect(webWebpackOptions.entry.length).toEqual(2);
expect(
normalize(webWebpackOptions.entry[0]).indexOf('client/index.js?') !== -1
).toBeTruthy();
expect(normalize(webWebpackOptions.entry[1])).toEqual('./foo.js');
// node target should have the hot runtime but not the client runtime
const nodeWebpackOptions = webpackOptions[1];
expect(nodeWebpackOptions.entry.length).toEqual(2);
expect(
normalize(nodeWebpackOptions.entry[0]).includes('webpack/hot/dev-server')
).toBeTruthy();
expect(normalize(nodeWebpackOptions.entry[1])).toEqual('./foo.js');
});
});