Added tests for import helpers with & without a declared template object creator.

tests/cases/compiler/importHelpers.ts

@@ -16,6 +16,12 @@ class C {
     }
 }
 
+function id<T>(x: T) {
+    return x;
+}
+
+export const result = id`hello world`;
+
 // @filename: script.ts
 class A { }
 class B extends A { }
@@ -28,6 +34,12 @@ class C {
     }
 }
 
+function id<T>(x: T) {
+    return x;
+}
+
+const result = id`hello world`;
+
 // @filename: tslib.d.ts
 export declare function __extends(d: Function, b: Function): void;
 export declare function __assign(t: any, ...sources: any[]): any;
@@ -35,3 +47,4 @@ export declare function __decorate(decorators: Function[], target: any, key?: st
 export declare function __param(paramIndex: number, decorator: Function): Function;
 export declare function __metadata(metadataKey: any, metadataValue: any): Function;
 export declare function __awaiter(thisArg: any, _arguments: any, P: Function, generator: Function): any;
+export declare function __makeTemplateObject(cooked: string[], raw: string[]): TemplateStringsArray;

tests/cases/compiler/taggedTemplateWithoutDeclaredHelper.ts

@@ -0,0 +1,14 @@
+// @target: es5
+// @module: commonjs
+// @importHelpers: true
+// @strict: true
+
+// @filename: foo.ts
+function id<T>(x: T) {
+  return x;
+}
+
+export const result = id `hello world`;
+
+// @filename: ./node_modules/tslib/index.d.ts
+export { };