Testing Aurelia Components with Aurelia-Testing

Aurelia-testing is a testing framework for Aurelia applications. It provides a set of APIs that make it easy to test Aurelia components, including views, view models, and services. In this article, we will explore how to use Aurelia-testing to test Aurelia components.

Setting Up Aurelia-Testing

To use Aurelia-testing, you need to install the aurelia-testing package. You can do this by running the following command in your terminal:

npm install aurelia-testing

Once you have installed the package, you can import it in your test file and start using it.

Writing Tests for Aurelia Components

Aurelia-testing provides a set of APIs that make it easy to test Aurelia components. Here are some of the most common APIs:

ComponentTester: This is the main API for testing Aurelia components. It provides methods for creating and destroying components, as well as for getting and setting component properties.

Component: This API represents an Aurelia component. It provides methods for getting and setting component properties, as well as for calling component methods.

Container: This API represents the container that holds the component. It provides methods for getting and setting container properties, as well as for calling container methods.

Example of Testing an Aurelia Component

Here is an example of how to test an Aurelia component using Aurelia-testing:

import { ComponentTester } from 'aurelia-testing';
import { MyComponent } from './my-component';

describe('MyComponent', () => {
  let component;

  beforeEach(() => {
    component = new ComponentTester(MyComponent);
  });

  it('should display the correct title', () => {
    component.bind({ title: 'Hello World' });
    component.run();
    const titleElement = component.element.querySelector('h1');
    expect(titleElement.textContent).toBe('Hello World');
  });

  it('should call the correct method when the button is clicked', () => {
    const buttonElement = component.element.querySelector('button');
    const methodSpy = jest.spyOn(component.viewModel, 'myMethod');
    buttonElement.click();
    expect(methodSpy).toHaveBeenCalledTimes(1);
  });
});

Testing Aurelia Components with Dependencies

When testing Aurelia components that have dependencies, you need to make sure that the dependencies are properly resolved. Aurelia-testing provides a few ways to do this:

Container: You can use the Container API to resolve dependencies. This API provides methods for getting and setting container properties, as well as for calling container methods.

ComponentTester: You can use the ComponentTester API to resolve dependencies. This API provides methods for creating and destroying components, as well as for getting and setting component properties.

Example of Testing an Aurelia Component with Dependencies

Here is an example of how to test an Aurelia component with dependencies using Aurelia-testing:

import { ComponentTester } from 'aurelia-testing';
import { MyComponent } from './my-component';
import { MyService } from './my-service';

describe('MyComponent', () => {
  let component;
  let service;

  beforeEach(() => {
    service = new MyService();
    component = new ComponentTester(MyComponent);
    component.container.register(MyService, service);
  });

  it('should display the correct title', () => {
    component.bind({ title: 'Hello World' });
    component.run();
    const titleElement = component.element.querySelector('h1');
    expect(titleElement.textContent).toBe('Hello World');
  });

  it('should call the correct method when the button is clicked', () => {
    const buttonElement = component.element.querySelector('button');
    const methodSpy = jest.spyOn(service, 'myMethod');
    buttonElement.click();
    expect(methodSpy).toHaveBeenCalledTimes(1);
  });
});

Conclusion

In this article, we have explored how to use Aurelia-testing to test Aurelia components. We have seen how to set up Aurelia-testing, write tests for Aurelia components, and test Aurelia components with dependencies. Aurelia-testing is a powerful tool that makes it easy to test Aurelia components, and it is an essential part of any Aurelia development workflow.

FAQs

Q: What is Aurelia-testing?

A: Aurelia-testing is a testing framework for Aurelia applications. It provides a set of APIs that make it easy to test Aurelia components, including views, view models, and services.

Q: How do I set up Aurelia-testing?

A: To set up Aurelia-testing, you need to install the aurelia-testing package. You can do this by running the following command in your terminal: npm install aurelia-testing.

Q: How do I write tests for Aurelia components?

A: To write tests for Aurelia components, you can use the ComponentTester API. This API provides methods for creating and destroying components, as well as for getting and setting component properties.

Q: How do I test Aurelia components with dependencies?

A: To test Aurelia components with dependencies, you need to make sure that the dependencies are properly resolved. You can use the Container API or the ComponentTester API to resolve dependencies.

Q: What is the difference between the Container API and the ComponentTester API?

A: The Container API provides methods for getting and setting container properties, as well as for calling container methods. The ComponentTester API provides methods for creating and destroying components, as well as for getting and setting component properties.