Added test that verifies the exit code when invalid arguments are passed to GitVersionExe. The exit code should be 1 (not 0).

Author: asbjornu

GitVersionExe.Tests/ExecCmdLineArgumentTest.cs

@@ -1,4 +1,5 @@
-using System.IO;
+using System;
+using System.IO;
 using NUnit.Framework;
 using Shouldly;
 
@@ -30,4 +31,28 @@ public void RunExecViaCommandLine()
             result.Log.ShouldContain("GitVersion_FullSemVer: 1.2.4+1");
         }
     }
+
+    [Test]
+    public void InvalidArgumentsExitCodeShouldNotBeZero()
+    {
+        using (var fixture = new EmptyRepositoryFixture())
+        {
+            fixture.Repository.MakeATaggedCommit("1.2.3");
+            fixture.Repository.MakeACommit();
+
+            var buildFile = Path.Combine(fixture.RepositoryPath, "RunExecViaCommandLine.proj");
+            File.Delete(buildFile);
+            const string buildFileContent = @"<?xml version=""1.0"" encoding=""utf-8""?>
+<Project xmlns=""http://schemas.microsoft.com/developer/msbuild/2003"">
+  <Target Name=""OutputResults"">
+    <Message Text=""GitVersion_FullSemVer: $(GitVersion_FullSemVer)""/>
+  </Target>
+</Project>";
+            File.WriteAllText(buildFile, buildFileContent);
+            var result = GitVersionHelper.ExecuteIn(fixture.RepositoryPath, arguments: " /invalid-argument");
+
+            result.ExitCode.ShouldBe(1);
+            result.Output.ShouldContain("Failed to parse arguments");
+        }
+    }
 }