Use a valid Compilation for testing exception handling

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers.Test/SpecialRules/SA0002UnitTests.cs

@@ -353,18 +353,33 @@ public async Task TestEmptySettingsAsync()
         }
 
         [Fact]
-        public void TestUnexpectedExceptionNotCaught()
+        public async Task TestUnexpectedExceptionNotCaughtAsync()
         {
-            var analysisContext = new AnalysisContextMissingOptions();
-            var analyzer = new SA0002InvalidSettingsFile();
-            analyzer.Initialize(analysisContext);
-            Assert.NotNull(analysisContext.CompilationAction);
-
-            var additionalFiles = ImmutableArray.Create<AdditionalText>(new InvalidAdditionalText());
-            Assert.Null(additionalFiles[0].Path);
-            Assert.Null(additionalFiles[0].GetText(CancellationToken.None));
-            var context = new CompilationAnalysisContext(compilation: null, options: new AnalyzerOptions(additionalFiles), reportDiagnostic: null, isSupportedDiagnostic: null, cancellationToken: CancellationToken.None);
-            Assert.Throws<ArgumentNullException>(() => analysisContext.CompilationAction(context));
+            await new CSharpTest
+            {
+                TestSources = { string.Empty },
+                SolutionTransforms =
+                {
+                    // Run additional validation here with access to a Compilation
+                    (solution, projectId) =>
+                    {
+                        var compilation = solution.GetProject(projectId).GetCompilationAsync(CancellationToken.None).GetAwaiter().GetResult();
+
+                        var analysisContext = new AnalysisContextMissingOptions();
+                        var analyzer = new SA0002InvalidSettingsFile();
+                        analyzer.Initialize(analysisContext);
+                        Assert.NotNull(analysisContext.CompilationAction);
+
+                        var additionalFiles = ImmutableArray.Create<AdditionalText>(new InvalidAdditionalText());
+                        Assert.Null(additionalFiles[0].Path);
+                        Assert.Null(additionalFiles[0].GetText(CancellationToken.None));
+                        var context = new CompilationAnalysisContext(compilation, options: new AnalyzerOptions(additionalFiles), reportDiagnostic: null, isSupportedDiagnostic: null, cancellationToken: CancellationToken.None);
+                        Assert.Throws<ArgumentNullException>(() => analysisContext.CompilationAction(context));
+
+                        return solution;
+                    },
+                },
+            }.RunAsync(CancellationToken.None).ConfigureAwait(false);
         }
 
         private class InvalidAdditionalText : AdditionalText