function compareDelta_()

in JsTestDriver/plugin/src/main/resources/com/google/jstestdriver/idea/assertFramework/jstd/jsSrc/Asserts.js [568:635]

• 50 lines of code
• 21 McCabe index (conditional complexity)

function compareDelta_(expected, actual, epsilon) {
  var compareDouble = function(e,a,d) {
    return Math.abs(e - a) <= d;
  }
  if (expected === actual) {
    return true;
  }

  if (typeof expected == "number" ||
      typeof actual == "number" ||
      !expected || !actual) {
    return compareDouble(expected, actual, epsilon);
  }

  if (isElement_(expected) || isElement_(actual)) {
    return false;
  }

  var key = null;
  var actualLength   = 0;
  var expectedLength = 0;

  try {
    // If an array is expected the length of actual should be simple to
    // determine. If it is not it is undefined.
    if (jstestdriver.jQuery.isArray(actual)) {
      actualLength = actual.length;
    } else {
      // In case it is an object it is a little bit more complicated to
      // get the length.
      for (key in actual) {
        if (actual.hasOwnProperty(key)) {
          ++actualLength;
        }
      }
    }

    // Arguments object
    if (actualLength == 0 && typeof actual.length == "number") {
      actualLength = actual.length;

      for (var i = 0, l = actualLength; i < l; i++) {
        if (!(i in actual)) {
          actualLength = 0;
          break;
        }
      }
    }

    for (key in expected) {
      if (expected.hasOwnProperty(key)) {
        if (!compareDelta_(expected[key], actual[key], epsilon)) {
          return false;
        }

        ++expectedLength;
      }
    }

    if (expectedLength != actualLength) {
      return false;
    }

    return expectedLength == 0 ? expected.toString() == actual.toString() : true;
  } catch (e) {
    return false;
  }
};