New: Run tests through powershell. (#1903)

test.ps1

@@ -0,0 +1,40 @@
+# Available types:
+# - Unit
+# - Integration
+# - Automation
+
+param([string]$type = "Unit")
+
+$where = "cat != ManualTest && cat != LINUX"
+$testDir = "."
+$testPattern = "*Test.dll"
+
+$nunit = "nunit3-console.exe"
+$nunitCommand = $nunit
+
+if (!(Get-Command $nunit -ErrorAction SilentlyContinue)) {
+    Write-Error "nunit3-console.exe was not found in your PATH, please install https://github.com/nunit/nunit-console/releases."
+    exit
+}
+
+switch ($type) {
+    "unit" { 
+        $where = $where + " && cat != IntegrationTest && cat != AutomationTest"
+    }
+    "integration" {
+        $where = $where + " && cat == IntegrationTest"
+    }
+    "automation" {
+        $where = $where + " && cat == AutomationTest"
+    }
+    Default {
+        Write-Error "Invalid test type specified."
+        exit
+    }
+}
+
+$assemblies = (Get-ChildItem -Path $testDir -Filter $testPattern -Recurse -File -Name) -join " "
+
+$command = $nunitCommand + " --where '" + $where + "' " + $assemblies 
+
+Invoke-Expression $command