Jest sharable preset used by the various HTML-validate packages
> HTML-Validate jest preset.
Jest is configured to:
- Run tests from *.spec.[jt]s.
- Collect coverage from .js and .ts in src and ignore tests (/*.spec.[jt]s) and index (/index.[jt]s).
- Report results as junit in temp/jest.xml.
- Transform typescript with ts-jest.
- Transform js with babel-jest if babel is detected.
- Ignores spec-files from Cypress.
``
npm install --save-dev @html-validate/jest-config
In your package.json file:
`json`
{
"jest": {
"preset": "@html-validate/jest-config"
}
}
| Preset | Description |
| ------------------------------------------ | ------------------------- |
| @html-validate/jest-config | Alias for presets/default |
| @html-validate/jest-config/presets/default | Default preset |
| @html-validate/jest-config/presets/esm | Experimental ESM support |
If you need to import and use ESM-only libraries you need to install @babel/core.
You do not need a babel.config.jsor.babelrcas the preset passes the required configuration directly tobabel-jest.
``
npm install --save-dev @babel/core
When babel is detect the preset sets transformIgnorePatterns to transpile everything under node_modules.transformIgnorePatterns
You can include a more specific list of packages to transform (potential speed gain) by manually setting :
Optionally you can set transformIgnorePatterns in package.json:
`diff`
{
"jest": {
"preset": "@html-validate/jest-config",
+ "transformIgnorePatterns": ["node_modules/(?!(foo|bar|baz)/)"]
}
}
This will transform only the foo, bar and baz packages.
Importing *.html is supported by jest configuration but requires additional typescript config by creating a declaration:
shim-html.d.ts:
`ts`
declare module "*.html" {
const value: string;
export default value;
}
This preset searches the project folder for typescript configuration in the following order:
1. tsconfig.jest.json
2.