Merge pull request #3311 from henryju/feature/feed_diagnostic_code

Feed VSCode diagnostic code to Roslyn diagnostic id

src/features/diagnosticsProvider.ts

@@ -335,6 +335,8 @@ class DiagnosticsProvider extends AbstractSupport {
         let message = `${quickFix.Text} [${quickFix.Projects.map(n => this._asProjectLabel(n)).join(', ')}]`;
 
         let diagnostic = new vscode.Diagnostic(toRange(quickFix), message, display.severity);
+        diagnostic.source = 'csharp';
+        diagnostic.code = quickFix.Id;
 
         if (display.isFadeout) {
             diagnostic.tags = [vscode.DiagnosticTag.Unnecessary];

test/integrationTests/diagnostics.integration.test.ts

@@ -44,7 +44,7 @@ suite(`DiagnosticProvider: ${testAssetWorkspace.description}`, function () {
     test("Return unnecessary tag in case of unnesessary using", async function () {
         let result = await poll(() => vscode.languages.getDiagnostics(fileUri), 15*1000, 500);
 
-        let cs8019 = result.find(x => x.message.includes("CS8019"));
+        let cs8019 = result.find(x => x.source == "csharp" && x.code == "CS8019");
         expect(cs8019).to.not.be.undefined;
         expect(cs8019.tags).to.include(vscode.DiagnosticTag.Unnecessary);
     });
@@ -53,8 +53,8 @@ suite(`DiagnosticProvider: ${testAssetWorkspace.description}`, function () {
         this.skip(); // Remove this once https://github.com/OmniSharp/omnisharp-roslyn/issues/1458 is resolved.
         let result = await poll(() => vscode.languages.getDiagnostics(fileUri), 15*1000, 500);
 
-        let ide0005 = result.find(x => x.message.includes("IDE0005"));
+        let ide0005 = result.find(x => x.source == "csharp" && x.code == "IDE0005");
-        expect(ide0005).to.not.be(undefined);
+        expect(ide0005).to.not.be.undefined;
         expect(ide0005.tags).to.include(vscode.DiagnosticTag.Unnecessary);
     });
 });