ember-sinon

import sinon from 'sinon'; import { module, test } from 'qunit'; import { setupTest } from 'ember-qunit'; // Assuming standard Ember QUnit setup module('Unit | Service | my-example-service', function(hooks) { setupTest(hooks); test('doSomething() should run the callback passed with expected arguments', function(assert) { assert.expect(2); // QUnit assertion count let myService = this.owner.lookup('service:my-example-service'); // Assuming a service named 'my-example-service' // Create a spy to observe function calls let spy = sinon.spy(); myService.doSomething(spy, 'test_argument'); // Assert using Sinon's built-in assertion methods sinon.assert.calledOnce(spy); sinon.assert.calledWith(spy, 'test_argument'); }); test('fetchData() should return stubbed data without making an actual network request', async function(assert) { assert.expect(1); let myService = this.owner.lookup('service:my-example-service'); // Create a stub for a method that might make an external call (e.g., fetch, AJAX) let stub = sinon.stub(myService, 'performNetworkRequest').returns(Promise.resolve({ id: 123, status: 'success' })); let result = await myService.fetchData(); assert.deepEqual(result, { id: 123, status: 'success' }, 'should return the predefined stubbed data'); // Restore the original method after the test to avoid side effects stub.restore(); }); });