Function deepCompare

lib/test/angular/1.6.7/angular.js:21178–21227

(actual, expected, comparator, anyPropertyKey, matchAgainstAnyProp, dontMatchWholeObject)

}

function deepCompare(actual, expected, comparator, anyPropertyKey, matchAgainstAnyProp, dontMatchWholeObject) {
  var actualType = getTypeForFilter(actual);
  var expectedType = getTypeForFilter(expected);

  if ((expectedType === 'string') && (expected.charAt(0) === '!')) {
    return !deepCompare(actual, expected.substring(1), comparator, anyPropertyKey, matchAgainstAnyProp);
  } else if (isArray(actual)) {
    // In case `actual` is an array, consider it a match
    // if ANY of it's items matches `expected`
    return actual.some(function(item) {
      return deepCompare(item, expected, comparator, anyPropertyKey, matchAgainstAnyProp);
    });
  }

  switch (actualType) {
    case 'object':
      var key;
      if (matchAgainstAnyProp) {
        for (key in actual) {
          // Under certain, rare, circumstances, key may not be a string and `charAt` will be undefined
          // See: https://github.com/angular/angular.js/issues/15644
          if (key.charAt && (key.charAt(0) !== '$') &&
              deepCompare(actual[key], expected, comparator, anyPropertyKey, true)) {
            return true;
          }
        }
        return dontMatchWholeObject ? false : deepCompare(actual, expected, comparator, anyPropertyKey, false);
      } else if (expectedType === 'object') {
        for (key in expected) {
          var expectedVal = expected[key];
          if (isFunction(expectedVal) || isUndefined(expectedVal)) {
            continue;
          }

          var matchAnyProperty = key === anyPropertyKey;
          var actualVal = matchAnyProperty ? actual : actual[key];
          if (!deepCompare(actualVal, expectedVal, comparator, anyPropertyKey, matchAnyProperty, matchAnyProperty)) {
            return false;
          }
        }
        return true;
      } else {
        return comparator(actual, expected);
      }
    case 'function':
      return false;
    default:
      return comparator(actual, expected);
  }
}

// Used for easily differentiating between `null` and actual `object`
function getTypeForFilter(val) {