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Testing Vue.js components

Translations: Français

Dependencies

Setup

The first step is setting up a helper to configure the environment to transpile .vue files and run in a browser like environment.

package.json:

{
	"ava": {
		"require": [
			"./test/_setup.js"
		]
	}
}
// ./test/_setup.js

// Set up JSDom.
require('jsdom-global')()

// Fix the Date object, see <https://github.com/vuejs/vue-test-utils/issues/936#issuecomment-415386167>.
window.Date = Date

// Setup browser environment
const hooks = require('require-extension-hooks');
const Vue = require('vue');

// Setup Vue.js to remove production tip
Vue.config.productionTip = false;

// Setup vue files to be processed by `require-extension-hooks-vue`
hooks('vue').plugin('vue').push();
// Setup vue and js files to be processed by `require-extension-hooks-babel`
hooks(['vue', 'js']).exclude(({filename}) => filename.match(/\/node_modules\//)).plugin('babel').push();

Note: If you are using babel-plugin-webpack-alias-7, you must also exclude your webpack file - e.g. filename.includes(/\/node_modules\//) || filename.includes('webpack.config.test.js')

You can find more information about setting up Babel with AVA in @ava/babel.

Sample snapshot test

const test = require('ava');
const Vue = require('vue');
const Component = require('component.vue');

test('renders', t => {
	const vm = new Vue(Component).$mount();
	const tree = {
		$el: vm.$el.outerHTML
	};
	t.snapshot(tree);
});

Coverage reporting

Follow the coverage reporting recipe, additionally adding the .vue extension to the nyc config to instrument .vue files.

{
	"nyc": {
		"extension": [
			".js",
			".vue"
		]
	}
}
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