From afe36be50cdc38b5824012d4ce53a6d9fc843ff5 Mon Sep 17 00:00:00 2001
From: Zhengbo Li <zhengbli@microsoft.com>
Date: Thu, 3 Nov 2016 16:26:03 -0700
Subject: [PATCH] Add test for
 https://github.com/Microsoft/TypeScript/pull/11980 (#12027)

* add test for the fix for overwrite emitting error

* cr feedback
---
 .../unittests/tsserverProjectSystem.ts        | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/harness/unittests/tsserverProjectSystem.ts b/src/harness/unittests/tsserverProjectSystem.ts
index 8d4ced42811f5..91b2092dbe22c 100644
--- a/src/harness/unittests/tsserverProjectSystem.ts
+++ b/src/harness/unittests/tsserverProjectSystem.ts
@@ -2464,4 +2464,28 @@ namespace ts.projectSystem {
 
         });
     });
+
+    describe("No overwrite emit error", () => {
+        it("for inferred project", () => {
+            const f1 = {
+                path: "/a/b/f1.js",
+                content: "function test1() { }"
+            };
+            const host = createServerHost([f1, libFile]);
+            const session = createSession(host);
+            openFilesForSession([f1], session);
+
+            const projectService = session.getProjectService();
+            checkNumberOfProjects(projectService, { inferredProjects: 1 });
+            const projectName = projectService.inferredProjects[0].getProjectName();
+
+            const diags = session.executeCommand(<server.protocol.CompilerOptionsDiagnosticsRequest>{
+                type: "request",
+                command: server.CommandNames.CompilerOptionsDiagnosticsFull,
+                seq: 2,
+                arguments: { projectFileName: projectName }
+            }).response;
+            assert.isTrue(diags.length === 0);
+        });
+    });
 }
\ No newline at end of file