Test generator when used in Visual Basic and when the Options only exist. (#23)

Signed-off-by: AraHaan <seandhunt_7@yahoo.com>

Author: AraHaan

tests/SourceGeneratorTests.cs

@@ -8,14 +8,15 @@
     using Microsoft.CodeAnalysis;
     using Microsoft.CodeAnalysis.CSharp;
     using Microsoft.CodeAnalysis.Text;
+    using Microsoft.CodeAnalysis.VisualBasic;
     using Xunit;
 
     public class SourceGeneratorTests
     {
         [Fact]
         public void TestGeneratingNonGeneric()
         {
-            var result = DoTest("TestNamespace.Test", false);
+            var result = DoTest("TestNamespace.Test", false, TestGenerate);
             Assert.Equal(@"// <autogenerated/>
 using Elskom.Generic.Libs;
 using TestNamespace;
@@ -27,7 +28,7 @@ public void TestGeneratingNonGeneric()
         [Fact]
         public void TestGeneratingGeneric()
         {
-            var result = DoTest("TestNamespace.Test", true);
+            var result = DoTest("TestNamespace.Test", true, TestGenerate);
             Assert.Equal(@"// <autogenerated/>
 using Elskom.Generic.Libs;
 using TestNamespace;
@@ -38,12 +39,30 @@ public void TestGeneratingGeneric()
 
         [Fact]
         public void TestGeneratingFailure()
-            => Assert.Throws<InvalidOperationException>(() => DoTest(string.Empty, false));
+            => Assert.Throws<InvalidOperationException>(
+                () => DoTest(
+                    null,
+                    false,
+                    TestGenerate));
+
+        [Fact]
+        public void TestVBGeneratingAbort()
+        {
+            var result = DoTest("TestNamespace.Test", false, TestGenerateVB);
+            Assert.Equal(string.Empty, result);
+        }
+
+        [Fact]
+        public void TestGenerateWithOnlyOptions()
+        {
+            var result = DoTest("TestNamespace.Test", TestGenerateSingle);
+            Assert.Equal(string.Empty, result);
+        }
 
         // the values on GitInfo are not valid in terms of results
         // that would normally be from git.
-        private static string DoTest(string assemblyType, bool generic)
-            => TestGenerate(
+        private static string DoTest(string? assemblyType, bool generic, Func<string, string, string> func)
+            => func.Invoke(
                 $@"{{
   ""$schema"": ""https://raw.githubusercontent.com/Elskom/GitBuildInfo.SourceGenerator/main/settings.schema.json"",
   ""AssemblyType"": ""{assemblyType}"",
@@ -55,23 +74,65 @@ private static string DoTest(string assemblyType, bool generic)
   ""GitBranch"": ""vsdfvfdsv"",
 }");
 
+        private static string DoTest(string? assemblyType, Func<string, string> func)
+            => func.Invoke($@"{{
+  ""$schema"": ""https://raw.githubusercontent.com/Elskom/GitBuildInfo.SourceGenerator/main/settings.schema.json"",
+  ""AssemblyType"": ""{assemblyType}"",
+  ""IsGeneric"": false,
+}}");
+
         private static string TestGenerate(string optionsText, string gitInfoText)
+            => TestGenerateInternal(
+                CreateCSharpCompilation(),
+                ImmutableArray.Create<AdditionalText>(
+                    new CustomAdditionalText("GitBuildInfo.json", optionsText),
+                    new CustomAdditionalText("GitInfo.json", gitInfoText)));
+
+        private static string TestGenerateSingle(string optionsText)
+            => TestGenerateInternal(
+                CreateCSharpCompilation(),
+                ImmutableArray.Create<AdditionalText>(
+                    new CustomAdditionalText("GitBuildInfo.json", optionsText)));
+
+        private static string TestGenerateVB(string optionsText, string gitInfoText)
+            => TestGenerateInternal(
+                VisualBasicCompilation.Create(
+                    "TestAssembly",
+                    Array.Empty<SyntaxTree>(),
+                    Array.Empty<MetadataReference>(),
+                    new VisualBasicCompilationOptions(
+                        OutputKind.DynamicallyLinkedLibrary)),
+                ImmutableArray.Create<AdditionalText>(
+                    new CustomAdditionalText("GitBuildInfo.json", optionsText),
+                    new CustomAdditionalText("GitInfo.json", gitInfoText)));
+
+        private static string TestGenerateInternal(Compilation compilation, ImmutableArray<AdditionalText> additionalTexts)
         {
-            var compilation = CSharpCompilation.Create(
+            var driver = CSharpGeneratorDriver.Create(new SourceGenerator()).AddAdditionalTexts(additionalTexts);
+            _ = driver.RunGeneratorsAndUpdateCompilation(
+                compilation,
+                out var outputCompilation,
+                out var generateDiagnostics);
+            Assert.False(
+                generateDiagnostics.Any(d => d.Severity == DiagnosticSeverity.Error),
+                $"Failed: {generateDiagnostics.FirstOrDefault()?.GetMessage()}");
+            try
+            {
+                return outputCompilation.SyntaxTrees.Last().ToString();
+            }
+            catch (InvalidOperationException) when (compilation is VisualBasicCompilation || additionalTexts.Count() is 1)
+            {
+                return string.Empty;
+            }
+        }
+
+        private static Compilation CreateCSharpCompilation()
+            => CSharpCompilation.Create(
                 "TestAssembly",
                 Array.Empty<SyntaxTree>(),
                 Array.Empty<MetadataReference>(),
                 new CSharpCompilationOptions(
                     OutputKind.DynamicallyLinkedLibrary));
-            var driver = CSharpGeneratorDriver.Create(new SourceGenerator())
-                .AddAdditionalTexts(
-                    ImmutableArray.Create<AdditionalText>(
-                        new CustomAdditionalText("GitBuildInfo.json", optionsText),
-                        new CustomAdditionalText("GitInfo.json", gitInfoText)));
-            _ = driver.RunGeneratorsAndUpdateCompilation(compilation, out var outputCompilation, out var generateDiagnostics);
-            Assert.False(generateDiagnostics.Any(d => d.Severity == DiagnosticSeverity.Error), $"Failed: {generateDiagnostics.FirstOrDefault()?.GetMessage()}");
-            return outputCompilation.SyntaxTrees.Last().ToString();
-        }
 
         private class CustomAdditionalText : AdditionalText
         {