_initTestsAndHinting(options) {
    let testsEnabledDefault = process.env.EMBER_CLI_TEST_COMMAND === 'true' || !this.isProduction;

    this.tests = 'tests' in options ? options.tests : testsEnabledDefault;
    this.hinting = 'hinting' in options ? options.hinting : testsEnabledDefault;
  }
Initializes the `tests` and `hinting` properties.

    Defaults to `false` unless `ember test` was used or this is *not* a production build.

    @private
    @method _initTestsAndHinting
    @param {Object} options