* Remove AllScope from most default aliases To speed up scope creation, I removed AllScope from most default aliases. This results in a 15-20% speedup for: function foo {} for ($i = 0; $i -lt 100kb; $i++) { & { foo } } I left AllScope of a few frequently used aliases because it does make command lookup faster. If we introduce something like dynamic sites for command lookup, then we could probably remove the rest of the AllScope aliases. This is a low-risk breaking change. One can ask for aliases at a particular scope: Get-Alias -Scope 1 nsn This could now fail if the scope number doesn't correspond to global scope. |
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README.md |
Pester Testing Test Guide
Also see the Writing Pester Tests document.
Running Pester Tests
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.