message: Provide a valid tsconfig.spec.json
  ng test use tsconfig.spec.json for compiling project.
diff: -{}
  +{
  + "extends": "../tsconfig.json",
  + "compilerOptions": {
  + "baseUrl": "./",
  + "module": "es6",
  + "outDir": "../out-tsc/spec",
  + "types": [
  + "jasmine",
  + "node"
  + ]
  + },
  + "files": [
  + "test.ts"
  + ],
  + "include": [
  + "**/*.spec.ts",
  + "**/*.d.ts"
  + ]
  +}
  