PSFTest #145

function Test-ValidatePattern {
    [CmdletBinding()]
    param (
        [string]
        $Path
    )

    $ast = [System.Management.Automation.Language.Parser]::ParseInput((Get-Content $Path -Raw), [ref]$null, [ref]$null)
    $attributes = $ast.FindAll( {
            if ($args[0] -isnot [System.Management.Automation.Language.AttributeAst]) { return }
            if ('ValidatePattern' -ne $args[0].TypeName.Name) { return }
            $true
        }, $true)
    
    foreach ($attribute in $attributes) {
        Write-PSFMessage -Message "Processing {0}" -StringValues $attribute -Target $attribute
        try { $null = "" -match $attribute.PositionalArguments[0].Value }
        catch {
            [PSCustomObject]@{
                Text = $attribute.Extent.ToString()
                Item = $attribute
                Line = $attribute.Extent.StartLineNumber
            }
        }
    }
}