Try to get Unix File permission tests working

Author: hwoodiwiss

Tests/Compress-Archive.Tests.ps1

@@ -296,6 +296,47 @@ BeforeDiscovery {
             Compress-Archive -Path $sourcePath -DestinationPath $destinationPath
             $destinationPath | Should -BeZipArchiveOnlyContaining @('SourceDir/', 'SourceDir/ChildDir-1/', 'SourceDir/ChildDir-2/', 'SourceDir/ChildEmptyDir/', 'SourceDir/Sample-1.txt', 'SourceDir/ChildDir-1/Sample-2.txt', 'SourceDir/ChildDir-2/Sample-3.txt')
         }
+        
+        It "Validate Unix file permissions are preserved" -Skip:$IsWindows {
+            Remove-Alias "ls" -Force -ErrorAction Ignore
+            $testDriveRoot = (Get-PsDrive "TestDrive").Root
+            Write-Host $testFileRoot
+            $sourcePath = "TestDrive:/SourceDir"
+            $sourcePathAbsolute = "$testDriveRoot/SourceDir"
+            $destinationPath = "TestDrive:/archive4.zip"
+            $destinationPathAbsolute = "$testDriveRoot/archive4.zip"
+            $unzipPathAbsolute = "$testDriveRoot/test-unzip"
+
+            $expectedDirectoryPermissions = "d---------"
+            $expectedFilePermissions = "-rw-------"
+
+            chmod -R u+rw "$sourcePathAbsolute"
+            Compress-Archive -Path $sourcePath -DestinationPath $destinationPath
+            unzip $destinationPathAbsolute -d $unzipPathAbsolute -v
+
+            $lsOutput = ls -Rl $unzipPathAbsolute
+            $lines = $lsOutput -split [System.Environment]::NewLine
+
+            foreach ($line in $lines) {
+                if (-not $line.StartsWith("-") -and -not $line.StartsWith("d")) {
+                    continue;
+                }
+
+                $lineComponents = $line -split " +"
+
+                $permissionString = $lineComponents[0];
+                if ($permissionString[0] -eq 'd') {
+                    if ($permissionString -ne $expectedDirectoryPermissions) {
+                        throw "Expected directory permissions '$expectedDirectoryPermissions' but got '$permissionString'"
+                    }
+                }
+                else {
+                    if ($permissionString -ne $expectedFilePermissions) {
+                        throw "Expected file permissions '$expectedFilePermissions' but got '$permissionString'"
+                    }
+                }
+            }
+        }
     }
 
     Context "Update tests" -Skip {