how do I start doing testing?

To start doing testing in Swift, you can follow these steps:

1. Add a Test Bundle Target:

   • In Xcode, choose File > New > Target.
   • Search for Unit Testing Bundle in the test section.
   • Swift testing is the default choice for this template in Xcode 16.
   • Choose a name for your new target and click Finish.

2. Write Your First Test:

   • Import the testing module in your test file.
   • Write a global function and add the @test attribute to it. This attribute indicates that the function is a test.
   • Xcode will recognize it and show a run button alongside it.
   • Test functions are ordinary Swift functions with the @test attribute. They can be global functions or methods in a type and can be marked async or throws if needed.
   • Fill out the body of the function to validate something, such as checking the metadata for a video file.

For a more detailed guide, you can refer to the session Meet Swift Testing which covers the building blocks of Swift testing.

3. Running Tests:
   • To run all tests in your project, use the shortcut Command + U.
   • To run a specific test, click on the diamond next to the test function or anywhere up the hierarchy to run a collection of tests.

For more techniques on working efficiently with tests, you can check out the session Xcode essentials.

4. Using Test Plans:
   • Edit the test plan from the Product > Test Plan menu.
   • Choose which targets to include, such as both unit tests and UI tests.
   • Select which tests from those targets to include in the test plan.
   • Add the test plan to multiple schemes if needed.
   • To run your test plan, select it from Product > Test Plan, then choose Product > Test or use Command + U.

For more information on test plans, refer to the session Xcode essentials.

5. Advanced Testing Techniques:
   • Swift testing supports parallel testing by default, which can reduce execution time and provide faster results.
   • You can also use tags to organize and selectively run tests across your test suite.

For advanced testing techniques, you can watch the session Go further with Swift Testing.

Relevant Sessions:

1. Meet Swift Testing
2. Xcode essentials
3. Go further with Swift Testing

These sessions will provide you with a comprehensive understanding of how to start and efficiently manage testing in Swift.