Find the first tag value for a describe block in a pester test file

find_describe_tag.ps1

$text = Get-Content .\src\SQLChecks\Tests\Databases.tests.ps1
$ast = [Management.Automation.Language.Parser]::ParseInput($text, [ref]$null, [ref]$null)

$ast.FindAll({
    param($t)
    $t -is [System.Management.Automation.Language.CommandAst] -and
    $t.CommandElements[0].Value -eq "Describe"
}, $true) | ForEach-Object { 
    $_.CommandElements[3].Value
}

# Inspiration:
# - https://sqldbawithabeard.com/2018/01/15/using-the-ast-in-pester-for-dbachecks/
# - https://blogs.technet.microsoft.com/heyscriptingguy/2012/09/26/learn-how-it-pros-can-use-the-powershell-ast/
# - https://stackoverflow.com/questions/39909021/parsing-powershell-script-with-ast