Added PowerShell teset for Nim

Author: Undalevein

nim/test.ps1

@@ -0,0 +1,32 @@
+function Assert-MatchTests {
+    param (
+        [Parameter(Mandatory = $true, ValueFromPipeline)] $TestResult
+    )
+
+    if ($TestResult) {
+        Write-Error "Output does not match expected results."
+    }
+}
+
+$bin = "$PSScriptRoot\bin"
+
+# First check if folder bin exists. If not, make a new bin folder.
+if (!(Test-Path -Path $bin)) {
+    New-Item -Path $bin -Type Directory
+} 
+
+$Error.clear()
+nim c "$PSScriptRoot\permutations.nim" && . "$PSScriptRoot\permutations.exe" I like carrots |
+    Compare-Object (Get-Content "$PSScriptRoot\..\test\carrots_expected") |
+    Assert-MatchTests &&
+nim c "$PSScriptRoot\triple.nim" && . "$PSScriptRoot\triple.exe" |
+    Compare-Object (Get-Content "$PSScriptRoot\..\test\triple_expected") |
+    Assert-MatchTests &&
+ForEach-Object 'foo'
+
+if ($Error -or !$?) { 
+    "*** NIM TESTS FAILED ***" 
+}
+else { 
+    "NIM TESTS PASSED" 
+}