Delve into front-end testing principles, learn best practices for writing enduring tests, and discover strategies for E2E testing and integration into CI pipelines. Gain actionable testing insights.

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This course will provide you with important information, principles, and experience-based advice, to enter the world of testing methodologies. 

Here, you will learn the best practices to follow to write useful and lasting tests, how to test different user flows without a working back-end, how to write effective end-to-end tests (E2E), and how to integrate tests into development and Continuous Integration pipelines.

At the end of the course, you will be able to apply the fundamental principles of the test methodologies to understand what and how to test effectively.

Front-end Testing 101: Integration and End-to-end Testing

Imagine a back-ender is going to release an update and wants to run only the E2E tests locally to be sure that everything works as expected. A `npm run tests:e2e` script could be helpful. Something like the following script will launch just the E2E tests.


```json
"scripts": {
  "tests:e2e": "cypress run --spec \"cypress/integration/**/*.e2e.*\""
}
```

 You can also use the [cypress-select-tests](https://github.com/bahmutov/cypress-select-tests) plugin to select the tests an easier way (`cypress run --env fgrep=e2e`)  or to run only the tests with a particular title (`cypress run --env grep='E2E'`).

Dedicated Scripts

Introduction

E2E Testing

The First E2E Test

Polishing the E2E test

Ajax Requests

Custom Commands

UI Integration Tests

Other Best Practices

Bonus Section

Conclusion

Appendix

Dedicated Scripts