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How to test ECMAScript modules in the browser · test-runner-js/test-runner Wiki · GitHub
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How to test ECMAScript modules in the browser
Lloyd Brookes edited this page Dec 12, 2019
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Install web-runner.
$ npm install --save-dev @test-runner/web
Typical web test file example.
import Tom from 'test-object-model'
import 'https://www.chaijs.com/chai.js'
const assert = chai.assert
const tom = new Tom()
tom.test('Math.random() should return a number between 0 and 1', function () {
const result = Math.random()
assert.equal(typeof result, 'number')
assert.ok(result >= 0 && result <= 1)
})
tom.test('REST API should return the current todo item', async function () {
const response = await fetch('https://jsonplaceholder.typicode.com/todos/1')
const todo = await response.json()
assert.equal(todo.userId, 1)
assert.equal(todo.title, 'delectus aut autem')
})
export default tom
Run the tests using web-runner. This runner is identical to test-runner with the one difference that it runs the tests in Chromium rather than Node.js.
$ npx web-runner test.mjs
Start: 2 tests loaded
✓ synopsis Math.random() should return a number between 0 and 1
✓ synopsis REST API should return the current todo item
Completed in 199ms. Pass: 2, fail: 0, skip: 0.
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