[Windows] Implement new directories hierarchy (#8616)

images/windows/scripts/tests/DotnetSDK.Tests.ps1

@@ -0,0 +1,34 @@
+$dotnetVersions = (Get-ToolsetContent).dotnet.versions
+$dotnetTools = (Get-ToolsetContent).dotnet.tools
+
+Describe "Dotnet SDK and tools" {
+
+    Context "Default" {
+        It "Default Dotnet SDK is available" {
+            "dotnet --version" | Should -ReturnZeroExitCode
+        }
+    }
+
+    foreach ($version in $dotnetVersions) {
+        Context "Dotnet $version" {
+            $dotnet = @{ dotnetVersion = $version }
+
+            It "SDK $version is available" -TestCases $dotnet {
+                (dotnet --list-sdks | Where-Object { $_ -match "${dotnetVersion}\.[0-9]*" }).Count | Should -BeGreaterThan 0
+            }
+
+            It "Runtime $version is available" -TestCases $dotnet {
+                (dotnet --list-runtimes | Where-Object { $_ -match "${dotnetVersion}\.[0-9]*" }).Count | Should -BeGreaterThan 0
+            }
+        }
+    }
+
+    Context "Dotnet tools" {
+        $env:Path += ";C:\Users\Default\.dotnet\tools"
+        $testCases = $dotnetTools | ForEach-Object { @{ ToolName = $_.name; TestInstance = $_.test }}
+
+        It "<ToolName> is available" -TestCases $testCases {
+            "$TestInstance" | Should -ReturnZeroExitCode
+        }
+    }
+}