shouldDetect(options, input, expected) {
    let detectedConfig = Comb.detectInString(input, options);
    assert.deepEqual(detectedConfig, expected);
  }
Detect options in a file and compare result with expected.
File names should be relative to test suite's folder.
@param {Array} options List of options that should be detected
@param {String} input Name of template file
@param {Object} expected Expected config with detected options