Invoke-Pester breaks on invalid CodeCoverage.OutputEncoding format

[fflaten]

Checklist

• Issue has a meaningful title
• I have searched the existing issues. See all issues
• I have tested using the latest version of Pester. See Installation and update guide.

What is the issue?

Providing a invalid encoding to CodeCoverage.OutputEncoding throws an exception at the end of Invoke-Pester breaking Run.PassThru etc.

Expected Behavior

Properly typed configuration option or early validation in Invoke-Pester to avoid breaking the run at the end.

Tests completed in 5.32s
Tests Passed: 437, Failed: 0, Skipped: 0, Inconclusive: 0, NotRun: 0
Processing code coverage result.
System.Management.Automation.RuntimeException: Invoking step End failed:
Result 1 - Error 1:Out-File: /workspaces/Pester/src/functions/Coverage.Plugin.ps1:194:88
Line |
 194 |  … h -Encoding $PesterPreference.CodeCoverage.OutputEncoding.Value -Forc …
     |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Cannot process argument transformation on parameter 'Encoding'. 'utf-15' is not a supported encoding name. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider
     | method. (Parameter 'name')

at <ScriptBlock>, /workspaces/Pester/src/functions/Coverage.Plugin.ps1: line 194
at Invoke-PluginStep, /workspaces/Pester/src/Pester.Runtime.ps1: line 1275
at Invoke-Pester<End>, /workspaces/Pester/src/Main.ps1: line 853
at <ScriptBlock>, <No file>: line 12

at Assert-Success, /workspaces/Pester/src/Pester.Runtime.ps1: line 1332
at Invoke-PluginStep, /workspaces/Pester/src/Pester.Runtime.ps1: line 1294
at Invoke-Pester<End>, /workspaces/Pester/src/Main.ps1: line 853
at <ScriptBlock>, <No file>: line 12

Steps To Reproduce

# Executed in pester-repo
$c = New-PesterConfiguration
$c.Run.Path = './tst/functions/assertions'
$c.Run.ExcludePath = '*/demo/*', '*/examples/*', '*/testProjects/*', '*/Pester.Tests.ps1'
$c.Output.Verbosity = 'Detailed'
$c.CodeCoverage.Enabled = $true
$c.CodeCoverage.Path = './src/functions'
$c.CodeCoverage.UseBreakpoints = $false
$c.CodeCoverage.OutputFormat = 'JaCoCo'
$c.CodeCoverage.OutputEncoding = 'utf-15'
Invoke-Pester -Configuration $c

Describe your environment

Pester version : 5.6.0-beta1 /workspaces/Pester/bin/Pester.psm1
PowerShell version : 7.4.1
OS version : Unix 5.15.133.1

Possible Solution?

No response