webpack-test-utils
v2.1.0TypeScript
Utility functions to test Webpack plugins/loaders
0/weekUpdated 3 years agoMITUnpacked: 12.9 KB
Published by Hiroki Osame
npm install webpack-test-utilswebpack-test-utils 
Utility functions to test Webpack loaders/plugins
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- In-memory builds Uses an in-memory file-system for faster builds that don't pollute your disk
- TypeScript support Get type hints and develop with confidence
- Sensible defaults Builds in production-mode by default with minification disabled
- Webpack 4 & 5 support Both versions are supported
🚀 Install
``
bash
npm i -D webpack-test-utils
`👨🏫 Usage
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js
import { build } from 'webpack-test-utils'test('build', async () => {
// Create in-memory file-system
const volume = {
'/src/index.js': 'export default "12345"'
}
// Run Webpack build
const built = await build(volume)
// Verify successful build
expect(built.stats.hasErrors()).toBe(false)
expect(built.stats.hasWarnings()).toBe(false)
// Run the code to verify result
expect(built.require('/dist/index.js')).toBe('12345')
})
`$3
js
import { watch } from 'webpack-test-utils'test('watch', async () => {
// Create in-memory file-system
const volume = {
'/src/index.js': 'export default "12345"'
}
// Create Webpack watcher
const watching = watch(volume)
// Create build
let stats = await watching.build()
// Verify result
expect(stats.hasWarnings()).toBe(false)
expect(watching.require('/dist')).toBe('12345')
// Update source code
watching.fs.writeFileSync('/src/index.js', 'export default "54321"')
// Rebuild
stats = await watching.build()
expect(stats.hasWarnings()).toBe(false)
// Delete cache and re-require to validate changed result
delete watching.require.cache[watching.require.resolve('/dist')]
expect(watching.require('/dist')).toBe('54321')
// Close watcher
await watching.close()
})
`
⚙️ API
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Returns:
Run a single Webpack build.
#### volume
Type:
Required
An object where the key is the absolute path, and the value is the content of the path.
#### configurationHook
Type:
A function that receives the Webpack configuration object for configuration before running the build.
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Returns:
Run a single Webpack build.
#### volume
Type:
Required
An object where the key is the absolute path, and the value is the content of the path.
#### configurationHook
Type:
A function that receives the Webpack configuration object for configuration before running the build.
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