Fixes unit tests

Author: Fatme Havaluova

test/stubs.ts

@@ -201,6 +201,10 @@ export class NPMStub implements INodePackageManager {
 	getLatestVersion(packageName: string): IFuture<string> {
 		return Future.fromResult("");
 	}
+
+	getCachedPackagePath(packageName: string, version: string): string {
+		return "";
+	}
 }
 
 export class ProjectDataStub implements IProjectData {
@@ -273,6 +277,12 @@ export class PlatformProjectServiceStub implements IPlatformProjectService {
     addLibrary(platformData: IPlatformData, libraryPath: string): IFuture<void> {
         return Future.fromResult();
     }
+	canUpdatePlatform(currentVersion: string, newVersion: string): IFuture<boolean> {
+		return Future.fromResult(false);
+	}
+	updatePlatform(currentVersion: string, newVersion: string): IFuture<void> {
+		return Future.fromResult();
+	}
 }
 
 export class ProjectDataService implements IProjectDataService {