Migration to Pester tests

images/win/scripts/Tests/Git.Tests.ps1

@@ -0,0 +1,35 @@
+Describe "Git" {
+    $gitTools = 'bash', 'awk', 'git', 'git-lfs'
+    $gitTestCases = $gitTools | ForEach-Object {
+        @{
+            toolName = $_
+            source = [regex]::Escape("$env:ProgramFiles\Git")
+        }
+    }
+
+    It "Toolname '<toolName>' is installed" -TestCases $gitTestCases {
+        "$toolName --version" | Should -ReturnZeroExitCode
+    }
+
+    It "ToolName '<toolName>' is located in '<source>'" -TestCases $gitTestCases {
+        (Get-Command -Name $toolName).Source | Should -Match $source
+    }
+
+    It "hub is installed" {
+        "hub --version" | Should -ReturnZeroExitCode
+    }
+
+    It "Git core.symlinks=true option is enabled" {
+        git config core.symlinks | Should -BeExactly true
+    }
+
+    It "GCM_INTERACTIVE environment variable should be equal Never" {
+        $env:GCM_INTERACTIVE | Should -BeExactly Never
+    }
+}
+
+Describe "GitVersion" {
+    It "gitversion is installed" {
+        "gitversion /version" | Should -ReturnZeroExitCode
+    }
+}