Implement new Pester Tests for Visual Studio (#1251)

* implement pester tests for visual studio

* fix components list

images/win/scripts/Tests/VisualStudio.Tests.ps1

@@ -0,0 +1,27 @@
+Describe "Visual Studio" {
+    Context "Basic" {
+        It "Catalog.json" {
+            Get-VsCatalogJsonPath | Should -Exist
+        }
+
+        It "Devenv.exe" {
+            $visualStudioEdition = Get-ToolsetContent | Select-Object -ExpandProperty visualStudio | Select-Object -ExpandProperty edition
+            $visualStudioVersion = Get-ToolsetContent | Select-Object -ExpandProperty visualStudio | Select-Object -ExpandProperty version
+            $vsInstallRoot = Get-VisualStudioPath -Version $visualStudioVersion -Edition $visualStudioEdition
+            $devenvexePath = "${vsInstallRoot}\Common7\IDE\devenv.exe"
+            $devenvexePath | Should -Exist
+        }
+    }
+
+    Context "Visual Studio components" {
+        $expectedComponents = Get-ToolsetContent | Select-Object -ExpandProperty visualStudio | Select-Object -ExpandProperty workloads
+        $testCases = $expectedComponents | ForEach-Object { @{ComponentName = $_} }
+        BeforeAll {
+            $installedComponents = Get-VisualStudioComponents | Select-Object -ExpandProperty Package
+        }
+
+        It "<ComponentName>" -TestCases $testCases {
+            $installedComponents | Should -Contain $ComponentName
+        }
+    }
+}