Test: Ensure all scripts are not LE Unicode encoded

Tests/PowerSploit.tests.ps1

@@ -0,0 +1,49 @@
+Set-StrictMode -Version Latest
+
+$TestScriptRoot = Split-Path $MyInvocation.MyCommand.Path -Parent
+$ModuleRoot = Resolve-Path "$TestScriptRoot\.."
+
+filter Assert-NotLittleEndianUnicode {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $True,
+                   ValueFromPipelineByPropertyName = $True,
+                   ValueFromPipeline = $True)]
+        [Alias('FullName')]
+        [String[]]
+        $FilePath
+    )
+
+    $LittleEndianMarker = 48111 # 0xBBEF
+
+    Write-Verbose "Current file: $FilePath"
+    Write-Debug "Current file: $FilePath"
+
+    if ([System.IO.Directory]::Exists($FilePath)) {
+        Write-Debug "File is a directory."
+        return
+    }
+
+    if (-not [System.IO.File]::Exists($FilePath)) {
+        Write-Debug "File does not exist."
+        return
+    }
+
+    $FileBytes = Get-Content -TotalCount 3 -Encoding Byte -Path $FilePath
+
+    if ($FileBytes.Length -le 2) {
+        Write-Debug "File must be at least 2 bytes in length."
+        return
+    }
+
+    if ([BitConverter]::ToUInt16($FileBytes, 0) -eq $LittleEndianMarker) {
+        Write-Debug "File contains little endian unicode marker."
+        throw "$_ is little-endian unicode encoded."
+    }
+}
+
+Describe 'ASCII encoding of all scripts' {
+	It 'should not contain little-endian unicode encoded scripts or modules' {
+		{ Get-ChildItem -Path $ModuleRoot -Recurse -Include *.ps1,*.psd1,*.psm1 | Assert-NotLittleEndianUnicode } | Should Not Throw
+	}
+}