Add unittest for parsing --lib in tsconfig

Author: Kanchalai Tanglertsampan

tests/cases/unittests/tsconfigParsing.ts

@@ -82,5 +82,25 @@ namespace ts {
  it("returns object with error when json is invalid", () => {
  assertParseError("invalid");
  });
+
+ it("returns object when users correctly specify library", () => {
+ assertParseResult(
+ `{
+ "compilerOptions": {
+ "library": "es5"
+ }
+ }`, {
+ config: { compilerOptions: { library: "es5" } }
+ });
+
+ assertParseResult(
+ `{
+ "compilerOptions": {
+ "library": "es5,es6"
+ }
+ }`, {
+ config: { compilerOptions: { library: "es5,es6" } }
+ });
+ });
  });
 }