Pester considers all files named
.Tests.ps1 to be test files. This is the default naming convention that is used by almost all projects.
Each file is called as the function it tests. This means that for a function
Get-Emoji we would have
Test files are placed in the same directory as the code that they test, or in a separate
tests directory that follows the same directory structure as the main src directory.
The convention above is the default that most projects use, but Pester is not prescriptive about how you should name or place your files. The default extension can be customized by setting the
Run.TestExtension configuration option. The relative position of files can be then adjusted by changing the code you use to code files into tests. See Importing tested functions.
However the convention above is the default and is recommended to be used, especially when you are starting with Pester.
There can be many tests in one file, but in bigger projects you might want to distinguish, Unit, and Acceptance tests (or whatever are the categories of tests you have). This is typically approached by using tags. But another way is to split the tests in separate files and name them accordingly
Get-Emoji.Acceptance.Tests.ps1. This keeps your Acceptance test and Unit test code separate, which might be a good idea as Acceptance tests are usually more complex, and require more dependencies.
You can then use the
Run.TestExtension configuration option to customize the file extension convention to run only
*.Acceptance.Tests.ps1 or keep the default to run all
*.Tests.ps1. Even more fine-grained control is possible by using the
-ExcludePath parameter, or by using
Get-ChildItem to filter all paths and then provide them to