Add Pester tests for Windows Features (#1225)

* Add Windows Features Pester tests

* Move win feature tests to separate file

* Remove validation script for disc space

* Remove Windows updates test

images/win/Windows2016-Azure.json

@@ -792,12 +792,6 @@
                 "{{ template_dir }}/scripts/Installers/Validate-VSWhere.ps1"
             ]
         },
-        {
-            "type": "powershell",
-            "scripts":[
-                "{{ template_dir }}/scripts/Installers/Validate-DiskSpace.ps1"
-            ]
-        },
         {
             "type": "powershell",
             "scripts":[

images/win/Windows2019-Azure.json

@@ -256,12 +256,6 @@
                 "{{ template_dir }}/scripts/Installers/Validate-Wix.ps1"
             ]
         },
-        {
-            "type": "powershell",
-            "scripts":[
-                "{{ template_dir }}/scripts/Installers/Validate-WSL.ps1"
-            ]
-        },
         {
             "type": "powershell",
             "scripts":[
@@ -797,12 +791,6 @@
                 "{{ template_dir }}/scripts/Installers/Validate-AliyunCli.ps1"
             ]
         },
-        {
-            "type": "powershell",
-            "scripts":[
-                "{{ template_dir }}/scripts/Installers/Validate-DiskSpace.ps1"
-            ]
-        },
         {
             "type": "powershell",
             "scripts":[

images/win/scripts/Installers/Install-ContainersFeature.ps1

@@ -15,3 +15,5 @@ if ($cpu.VirtualizationFirmwareEnabled -and $cpu.SecondLevelAddressTranslationEx
 } else {
   Write-Host "Skipping installation of Hyper-V feature"
 }
+
+Invoke-PesterTests -TestFile "WindowsFeatures" -TestName "ContainersFeature"

images/win/scripts/Installers/Validate-DiskSpace.ps1

@@ -1,14 +0,0 @@
-################################################################################
-##  File:  Validate-DiskSpace.ps1
-##  Desc:  Validate free disk space
-################################################################################
-
-$availableSpaceMB =  [math]::Round((Get-PSDrive -Name C).Free / 1MB)
-$minimumFreeSpaceMB = 15 * 1024
-
-Write-Host "Available disk space: $availableSpaceMB MB"
-if ($availableSpaceMB -le $minimumFreeSpaceMB)
-{
-    Write-Host "Not enough disk space on the image (minimum available space: $minimumFreeSpaceMB MB)"
-    exit 1
-}

images/win/scripts/Installers/Validate-WSL.ps1

@@ -1,14 +0,0 @@
-################################################################################
-##  File:  Validate-WSL.ps1
-##  Desc:  Validate WSL CLI existst
-################################################################################
-
-if (Get-Command -Name 'wsl')
-{
-    Write-Host 'wsl is on path'
-}
-else
-{
-    Write-Host 'wsl not on path'
-    exit 1
-}

images/win/scripts/Tests/WindowsFeatures.Tests.ps1

@@ -0,0 +1,41 @@
+Describe "WindowsFeatures" {
+
+    $testCases = @(
+        @{ FeatureName = "NET-Framework-Features" }
+        @{ FeatureName = "NET-Framework-45-Features" }
+        @{ FeatureName = "FS-iSCSITarget-Server" }
+    )
+
+    if (Test-isWin16) {
+        $testCases += @{ FeatureName = "BITS" }
+        $testCases += @{ FeatureName = "DSC-Service" }
+    }
+    if (Test-isWin19) {
+        $testCases += @{ FeatureName = "Microsoft-Windows-Subsystem-Linux" }
+    }
+
+    It "Windows Feature <FeatureName> is installed" -TestCases $testCases {
+        (Get-WindowsFeature -Name $FeatureName).InstallState | Should -Be "Installed"
+    }
+
+    if (Test-isWin19) {
+        it "Check WSL is on path" {
+            (Get-Command -Name 'wsl') | Should -BeTrue
+        }
+    }
+}
+
+Describe "ContainersFeature" {
+    It "Windows containers feature is installed" {
+        (Get-WindowsFeature -Name "Containers").InstallState | Should -Be "Installed"
+    }
+}
+
+Describe "DiskSpace" {
+    it "The image has enough disk space"{
+        $availableSpaceMB =  [math]::Round((Get-PSDrive -Name C).Free / 1MB)
+        $minimumFreeSpaceMB = 18 * 1024
+
+        $availableSpaceMB | Should -BeGreaterThan $minimumFreeSpaceMB
+    }
+}