Update build.cake to test against both NUnit 3 and 4

Author: manfred-brands

.config/dotnet-tools.json

@@ -3,10 +3,10 @@
   "isRoot": true,
   "tools": {
     "cake.tool": {
-      "version": "2.1.0",
+      "version": "3.2.0",
       "commands": [
         "dotnet-cake"
       ]
     }
   }
-}
+}

.gitignore

@@ -34,7 +34,7 @@ tools/
 
 # NUNIT
 *.VisualState.xml
-TestResult.xml
+TestResult*.xml
 
 # Build Results of an ATL Project
 [Dd]ebugPS/
@@ -288,4 +288,4 @@ CommentRemover.ConsoleApplication Output/
 CommentRemover.Task Output/
 
 # Generated Assembly info
-AssemblyInfo.Generated.cs
+AssemblyInfo.Generated.cs

build.cake

@@ -148,18 +148,29 @@ Task("Test")
     .IsDependentOn("Build")
     .Does(() =>
     {
+        Information("Testing against NUnit 3.xx");
         DotNetTest(TEST_PROJECT, new DotNetTestSettings
         {
             Configuration = configuration,
             Loggers = new string[] { "trx" },
-            VSTestReportPath = "TestResult.xml",
+            VSTestReportPath = "TestResult-NUnit3.xml",
+            MSBuildSettings = new DotNetMSBuildSettings().WithProperty("NUnitVersion", "3")
+        });
+        Information("Testing against NUnit 4.xx");
+        DotNetTest(TEST_PROJECT, new DotNetTestSettings
+        {
+            Configuration = configuration,
+            Loggers = new string[] { "trx" },
+            VSTestReportPath = "TestResult-NUnit4.xml",
+            MSBuildSettings = new DotNetMSBuildSettings().WithProperty("NUnitVersion", "4")
         });
     })
     .Finally(() =>
     {
         if (AppVeyor.IsRunningOnAppVeyor)
         {
-            AppVeyor.UploadTestResults("TestResult.xml", AppVeyorTestResultsType.MSTest);
+            AppVeyor.UploadTestResults("TestResult-NUnit3.xml", AppVeyorTestResultsType.MSTest);
+            AppVeyor.UploadTestResults("TestResult-NUnit4.xml", AppVeyorTestResultsType.MSTest);
         }
     });