Information:

We have a small counter application that increments or decrements a number. The CounterComponent takes an initial value as an @Input and emits the result of the counter as an @Output when we click on the Send button. Since we are testing our component as a black box, we only have access to our inputs and listen to the output values. We should not rely on any internal implementation details!!!

You can play with it by running : npx nx serve testing-input-output.

The file named counter.component.spec.ts will let test your application using Testing Library. To run the test suits, you need to run npx nx test testing-input-output. You can also install Jest Runner to execute your test by clicking on the Run button above each describe or it blocks.

For testing cypress, you will execute your test inside the child.component.cy.ts and run npx nx component-test testing-input-output to execute your test suits. You can add the --watch flag to execute your test in watch mode.

Statement

The goal is to test multiple behaviors of the application described inside each test file using Testing library and Cypress Component Testing.