Method assertExists

packages/compiler-cli/test/ngtsc/env.ts:124–128

(fileName: string)

  }

  assertExists(fileName: string) {
    if (!this.fs.exists(this.fs.resolve(this.outDir, fileName))) {
      throw new Error(`Expected ${fileName} to be emitted (outDir: ${this.outDir})`);
    }
  }

  assertDoesNotExist(fileName: string) {
    if (this.fs.exists(this.fs.resolve(this.outDir, fileName))) {