message: test: fix resolution to not depend on index.d.ts
  Implement `readFile` in `MockTypescriptHost` so TypeScript can resolve module based on it's resolution, since certain files are not on disk but in memory
  PR Close
diff: @@ -152,6 +152,8 @@ export class MockTypescriptHost implements ts.LanguageServiceHost {
  fileExists(fileName: string): boolean { return this.getRawFileContent(fileName) != null; }
  + readFile(path: string): string|undefined { return this.getRawFileContent(path); }
  +
  getMarkerLocations(fileName: string): {[name: string]: number}|undefined {
  let content = this.getRawFileContent(fileName);
  if (content) {
  