Functions/GenXdev.Coding.PowerShell.Modules/Assert-GenXdevCmdletTests.ps1

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Part of PowerShell module : GenXdev.Coding.PowerShell.Modules
Original cmdlet filename : Assert-GenXdevCmdletTests.ps1
Original author : René Vaessen / GenXdev
Version : 1.268.2025
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MIT License
 
Copyright 2021-2025 GenXdev
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
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<#
.SYNOPSIS
Asserts and improves unit-tests of a specified GenXdev cmdlet.
 
.DESCRIPTION
This function helps maintain and improve unit tests for GenXdev cmdlets by:
1. Creating test files if they don't exist
2. Opening the cmdlet in VS Code
3. Preparing and applying AI prompts for test generation/improvement
4. Managing test execution workflow
 
.PARAMETER CmdletName
The name of the cmdlet to improve unit-tests for. Required.
 
.PARAMETER Prompt
Custom AI prompt text to use for test generation. Optional.
 
.PARAMETER EditPrompt
Switch to only edit the AI prompt without modifying the cmdlet. Optional.
 
.PARAMETER AssertFailedTest
Switch to indicate assertion of a failed test. Optional.
 
.EXAMPLE
Assert-GenXdevCmdletTests -CmdletName "Get-GenXDevModuleInfo" -EditPrompt
 
.EXAMPLE
improvecmdlettests Get-GenXDevModuleInfo -AssertFailedTest
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function Assert-GenXdevCmdletTests {

    [CmdletBinding()]
    [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseSingularNouns', '')]
    [Alias('improvecmdlettests')]
    param(
        ########################################################################
        [Alias('cmd')]
        [parameter(
            Mandatory = $true,
            Position = 0,
            ValueFromPipeline = $true,
            ValueFromPipelineByPropertyName = $true,
            HelpMessage = 'The name of the cmdlet to improve unit-tests for'
        )]
        [ValidateNotNullOrEmpty()]
        [string] $CmdletName,

        ########################################################################
        [parameter(
            Position = 1,
            Mandatory = $false,
            HelpMessage = 'Custom AI prompt text to use'
        )]
        [AllowEmptyString()]
        [string] $Prompt = '',
        ########################################################################
        [parameter(
            Position = 2,
            Mandatory = $false,
            HelpMessage = 'The AI prompt key to use for template selection'
        )]
        [AllowEmptyString()]
        [string] $PromptKey,
        ########################################################################
        [parameter(
            Mandatory = $false,
            HelpMessage = 'Switch to only edit the AI prompt'
        )]
        [switch] $EditPrompt,

        ########################################################################
        [parameter(
            Mandatory = $false,
            HelpMessage = 'Indicates to assert a failed test'
        )]
        [switch] $AssertFailedTest,
        ########################################################################
        [Parameter(
            Mandatory = $false,
            HelpMessage = 'Search in script files instead of modules'
        )]
        [switch] $FromScripts,
        ########################################################################
        [switch] $ContinuationHandled
    )

    begin {

        # get target cmdlet information including script position
        $params = GenXdev.Helpers\Copy-IdenticalParamValues `
            -FunctionName 'GenXdev.Helpers\Get-GenXDevCmdlet' `
            -BoundParameters $PSBoundParameters
        $params.ExactMatch = $true
        $params.CmdletName = $CmdletName
        $cmdlet = GenXdev.Helpers\Get-GenXDevCmdlet @params |
            Microsoft.PowerShell.Utility\Select-Object -First 1

        # validate cmdlet exists
        if ($null -eq $cmdlet) {
            throw "Could not find GenXdev cmdlet $CmdletName"
        }

        # store cmdlet name for later use
        $CmdletName = $cmdlet.Name
        $functionDefinition = '';

        # determine which prompt template to use based on test file existence
        if (-not [string]::IsNullOrWhiteSpace($PromptKey)) {

            $PromptKey = 'CreateUnitTests'
            $functionDefinition = [System.IO.File]::ReadAllText($cmdlet.ScriptFilePath)

            if ([IO.File]::Exists($cmdlet.ScriptTestFilePath) -and
                (-not [string]::IsNullOrWhiteSpace($functionDefinition))) {

                $PromptKey = $AssertFailedTest ? 'ResolveFailedTest' : 'ImproveUnitTest'
            }
        }

        # process prompt template if key provided
        if (-not [string]::IsNullOrWhiteSpace($PromptKey)) {

            # construct path to prompt template file
            $promptFilePath = GenXdev.FileSystem\Expand-Path "$PSScriptRoot\..\..\Prompts\GenXdev.Coding.PowerShell.Modules\Assert-$PromptKey.txt"

            # ensure prompt directory exists and expand path
            $promptFilePath = GenXdev.FileSystem\Expand-Path -FilePath $promptFilePath `
                -CreateDirectory

            # load template and replace placeholder
            $Prompt = [System.IO.File]::ReadAllText($promptFilePath).Replace(
                "`$Prompt",
                $Prompt
            )
        }

        # populate template variables
        $Prompt = $Prompt.Replace("`$CmdletName", $cmdlet.Name)
        $Prompt = $Prompt.Replace("`$CmdLetNoTestName", $cmdlet.Name)
        $Prompt = $Prompt.Replace(
            "`$ScriptTestFileName",
            [System.IO.Path]::GetFileName($cmdlet.ScriptTestFilePath)
        )
        $Prompt = $Prompt.Replace(
            "`$FullModuleName",
            $cmdlet.ModuleName
        )
        $Prompt = $Prompt.Replace(
            "`$BaseModuleName",

            [string]::Join('.', ($cmdlet.ModuleName.Split('.') | Microsoft.PowerShell.Utility\Select-Object -First 2 -ErrorAction SilentlyContinue))
        )
        $Prompt = $Prompt.Replace(
            "`$ScriptFileName",
            [System.IO.Path]::GetFileName($cmdlet.ScriptFilePath)
        )
        $Prompt = $Prompt.Replace(
            "`$FunctionDefinition",
            $functionDefinition
        )
        $Prompt = $Prompt.Replace("`t", ' ')

        # copy final prompt for use
        $previousClipboard = Microsoft.PowerShell.Management\Get-Clipboard
        $null = Microsoft.PowerShell.Management\Set-Clipboard -Value $Prompt
    }


    process {

        # handle prompt editing request
        if ($EditPrompt) {
            p -c
            code $promptFilePath
            return
        }

        $found = $true

        # create test file if missing
        if (-not [IO.File]::Exists($cmdlet.ScriptTestFilePath) -or
            ([IO.File]::ReadAllText($cmdlet.ScriptTestFilePath).Trim() -eq [string]::Empty)) {

            $found = $false
            Microsoft.PowerShell.Utility\Write-Verbose 'Creating new unit test file'
            $null = GenXdev.FileSystem\Expand-Path -FilePath ($cmdlet.ScriptTestFilePath) -CreateFile
        }

        # ensure copilot keyboard shortcut is configured
        GenXdev.Coding\EnsureCopilotKeyboardShortCut

        # open cmdlet in vscode and activate copilot
        # open cmdlet in vscode and insert prompt
        # open cmdlet in vscode and insert prompt
        $invocationParams = GenXdev.Helpers\Copy-IdenticalParamValues `
            -FunctionName 'GenXdev.Coding\Show-GenXdevCmdLetInIde' `
            -BoundParameters $PSBoundParameters
        $invocationParams.UnitTests = $true
        $invocationParams.CmdletName = $CmdletName
        $invocationParams.Code = $true
        $keysToSendFirst = @(
                "^``", "^``", '^+i', '^n', '^a', '{DELETE}', '^%b'
            )
        $keysToSendLast = @('^+%{F12}', '{ENTER}', '^v', '{ENTER}', '^{ENTER}', "^``")
        $invocationParams.KeysToSend = $keysToSendFirst + $keysToSendLast;
        GenXdev.Coding\Show-GenXdevCmdLetInIde @invocationParams

        # switch to test file and paste prompt
        Microsoft.PowerShell.Utility\Write-Verbose 'Applying AI prompt from clipboard'
        $invocationParams.KeysToSend = $keysToSendLast
        $invocationParams.UnitTests = $false
        GenXdev.Coding\Show-GenXdevCmdLetInIde @invocationParams
        Microsoft.PowerShell.Utility\Start-Sleep 1;
        $null = Microsoft.PowerShell.Management\Set-Clipboard -Value $previousClipboard
        Microsoft.PowerShell.Utility\Start-Sleep 4;

        if ($ContinuationHandled) {

            return;
        }

        # handle workflow based on whether test file existed
        if (-not $found) {

            switch ($host.ui.PromptForChoice(
                    'Make a choice',
                    'What to do next?',
                    @('&Stop', '&Test the new unit tests', 'Redo &Last'),
                    1)) {
                    0 { throw 'Stopped'; return }
                    1 { return (GenXdev.Coding\Assert-GenXdevTest -CmdletName $CmdletName -TestFailedAction SolveWithAI -IncludeScripts) }
                    2 { return GenXdev.Coding\Assert-GenXdevCmdletTests @PSBoundParameters }
            }
        }
        else {

            switch ($host.ui.PromptForChoice(
                    'Make a choice',
                    'What to do next?',
                    @('&Stop', '&Test the improved unit tests', 'Redo &Last'),
                    1)) {
                    0 { throw 'Stopped'; return }
                    1 { return (GenXdev.Coding\Assert-GenXdevTest -CmdletName $CmdletName -TestFailedAction SolveWithAI -IncludeScripts) }
                    2 { return GenXdev.Coding\Assert-GenXdevCmdletTests @PSBoundParameters }
            }
        }
    }

    end {

    }
}
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