test: add test for supress error 2961 when emitExtension is .ts

Author: Jack-Works

tests/baselines/reference/emitExtensionTSNotFound.errors.txt

@@ -0,0 +1,10 @@
+tests/cases/compiler/0.ts(2,17): error TS2307: Cannot find module './1.ts'.
+
+
+==== tests/cases/compiler/0.ts (1 errors) ====
+    // should not emit error 2961
+    import num from './1.ts'
+                    ~~~~~~~~
+!!! error TS2307: Cannot find module './1.ts'.
+    num + 1
+    

tests/baselines/reference/emitExtensionTSNotFound.js

@@ -0,0 +1,12 @@
+//// [0.ts]
+// should not emit error 2961
+import num from './1.ts'
+num + 1
+
+
+//// [0.ts]
+"use strict";
+exports.__esModule = true;
+// should not emit error 2961
+var _1_ts_1 = require("./1.ts");
+_1_ts_1["default"] + 1;

tests/baselines/reference/emitExtensionTSNotFound.symbols

@@ -0,0 +1,8 @@
+=== tests/cases/compiler/0.ts ===
+// should not emit error 2961
+import num from './1.ts'
+>num : Symbol(num, Decl(0.ts, 1, 6))
+
+num + 1
+>num : Symbol(num, Decl(0.ts, 1, 6))
+

tests/baselines/reference/emitExtensionTSNotFound.types

@@ -0,0 +1,10 @@
+=== tests/cases/compiler/0.ts ===
+// should not emit error 2961
+import num from './1.ts'
+>num : any
+
+num + 1
+>num + 1 : any
+>num : any
+>1 : 1
+

tests/cases/compiler/emitExtensionTSNotFound.ts

@@ -0,0 +1,7 @@
+// @emitExtension: .ts
+// @outDir: ./out/
+
+// @Filename: 0.ts
+// should not emit error 2961
+import num from './1.ts'
+num + 1