Add autoload for TestLanguage.psm1 TestHelpers.psm1 (#3456)

* Add autoload for TestHelpers.psm1

Test.Helpers.psm1 was renamed to TestHelpers.psm1

* Resolve conflit and rebase Add autoload for TestLanguage.psm1

* Remove unneeded comments from PSD1 files

* Rename test modules

Remove approved verbs (Get-Verb) from module names.

* Enhance ShouldBeErrorId to output exception into pipeline for later analysis

* Remove unneeded comments

* Resolve merge conflict

test/tools/Modules/HelpersCommon/HelpersCommon.psd1

@@ -0,0 +1,21 @@
+#
+# Module manifest for module 'HelpersCommon'
+#
+
+@{
+
+RootModule = 'HelpersCommon.psm1'
+
+ModuleVersion = '1.0'
+
+GUID = 'cc1c8e94-51d1-4bc1-b508-62bc09f02f54'
+
+CompanyName = 'Microsoft Corporation'
+
+Copyright = 'Copyright (C) Microsoft Corporation, All rights reserved.'
+
+Description = 'Temporary module contains functions for using in tests'
+
+FunctionsToExport = 'Wait-UntilTrue', 'Test-IsElevated', 'ShouldBeErrorId'
+
+}

test/tools/Modules/HelpersCommon/HelpersCommon.psm1

@@ -0,0 +1,70 @@
+function Wait-UntilTrue
+{
+    [CmdletBinding()]
+    param (
+        [ScriptBlock]$sb,
+        [int]$TimeoutInMilliseconds = 10000,
+        [int]$IntervalInMilliseconds = 1000
+        )
+    # Get the current time
+    $startTime = [DateTime]::Now
+
+    # Loop until the script block evaluates to true
+    while (-not ($sb.Invoke())) {
+        # Sleep for the specified interval
+        start-sleep -mil $intervalInMilliseconds
+
+        # If the timeout period has passed, throw an exception
+        if (([DateTime]::Now - $startTime).TotalMilliseconds -gt $timeoutInMilliseconds)
+        {
+            return $false
+        }
+    }
+    return $true
+}
+
+function Test-IsElevated
+{
+    $IsElevated = $False
+    if ( $IsWindows ) {
+        # on Windows we can determine whether we're executing in an
+        # elevated context
+        $identity = [System.Security.Principal.WindowsIdentity]::GetCurrent()
+        $windowsPrincipal = new-object 'Security.Principal.WindowsPrincipal' $identity
+        if ($windowsPrincipal.IsInRole("Administrators") -eq 1)
+        {
+            $IsElevated = $true
+        }
+    }
+    else {
+        # on Linux, tests run via sudo will generally report "root" for whoami
+        if ( (whoami) -match "root" ) {
+            $IsElevated = $true
+        }
+    }
+    return $IsElevated
+}
+#This function follows the pester naming convention
+function ShouldBeErrorId
+{
+    param([Parameter(ValueFromPipeline, Mandatory)]
+        [ScriptBlock]
+        $sb,
+
+        [Parameter(Mandatory, Position=0)]
+        [string]
+        $FullyQualifiedErrorId)
+
+        try
+        {
+            & $sb | Out-Null
+            Throw "No Exception!"
+        }
+        catch
+        {
+            $_.FullyQualifiedErrorId | Should Be $FullyQualifiedErrorId | Out-Null
+            # Write the exception to output that allow us to check later other properies of the exception
+            Write-Output $_
+        }
+}
+