tsconfig.spec.json

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "./out-tsc/spec",
    "types": ["jasmine", "node"]
  },
  "files": ["demo/test.ts", "demo/polyfills.ts"],
  "include": ["demo/**/*.spec.ts", "demo/**/*.d.ts"]
}