Support loading a custom `powershell.config.json` file via the command-line for use in testing. This change supports replacing the default `powershell.config.json` file that's usually loaded from the `PSHome` directory with a custom version file. The primary use-cases for this command-line option are as follows: 1. Allow the CI system to disable settings that impact test run times; such as disabling syslog usage on Linux and MacOS 2. Support testing of syslog and os_log without interfering with normal PowerShell operations during test runs via launching an instance with custom log settings. |
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README.md |
Pester Testing Test Guide
Also see the Writing Pester Tests document.
Running Pester Tests
First, restore the correct version of Pester using Restore-PSPester
.
Then, go to the top level of the PowerShell repository and run: Start-PSPester
inside a self-hosted copy of PowerShell.
You can use Start-PSPester -Tests SomeTestSuite*
to limit the tests run.
Testing new powershell
processes
Any launch of a new powershell
process must include -noprofile
so that
modified user and system profiles do not causes tests to fail. You also must
take care to call the development copy of PowerShell, which is not the first
one on the path.
Example:
$powershell = Join-Path -Path $PsHome -ChildPath "pwsh"
& $powershell -noprofile -command "ExampleCommand" | Should Be "ExampleOutput"
Portability
Some tests simply must be tied to certain platforms. Use Pester's
-Skip
directive on an It
statement to do this. For instance to run
the test only on Windows:
It "Should do something on Windows" -Skip:($IsLinux -Or $IsMacOS) { ... }
Or only on Linux and OS X:
It "Should do something on Linux" -Skip:$IsWindows { ... }
Pending
When writing a test that should pass, but does not, please do not skip or delete
the test, but use It "Should Pass" -Pending
to mark the test as pending, and
file an issue on GitHub.