92 lines
2.8 KiB
JavaScript
92 lines
2.8 KiB
JavaScript
|
|
||
|
|
// Taken from node's assert module, because it sucks
|
||
|
|
// and exposes next to nothing useful.
|
||
|
|
|
||
|
|
module.exports = _deepEqual;
|
||
|
|
|
||
|
|
function _deepEqual(actual, expected) {
|
||
|
|
// 7.1. All identical values are equivalent, as determined by ===.
|
||
|
|
if (actual === expected) {
|
||
|
|
return true;
|
||
|
|
|
||
|
|
} else if (Buffer.isBuffer(actual) && Buffer.isBuffer(expected)) {
|
||
|
|
if (actual.length != expected.length) return false;
|
||
|
|
|
||
|
|
for (var i = 0; i < actual.length; i++) {
|
||
|
|
if (actual[i] !== expected[i]) return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
|
||
|
|
// 7.2. If the expected value is a Date object, the actual value is
|
||
|
|
// equivalent if it is also a Date object that refers to the same time.
|
||
|
|
} else if (actual instanceof Date && expected instanceof Date) {
|
||
|
|
return actual.getTime() === expected.getTime();
|
||
|
|
|
||
|
|
// 7.3. Other pairs that do not both pass typeof value == "object",
|
||
|
|
// equivalence is determined by ==.
|
||
|
|
} else if (typeof actual != 'object' && typeof expected != 'object') {
|
||
|
|
return actual === expected;
|
||
|
|
|
||
|
|
// 7.4. For all other Object pairs, including Array objects, equivalence is
|
||
|
|
// determined by having the same number of owned properties (as verified
|
||
|
|
// with Object.prototype.hasOwnProperty.call), the same set of keys
|
||
|
|
// (although not necessarily the same order), equivalent values for every
|
||
|
|
// corresponding key, and an identical "prototype" property. Note: this
|
||
|
|
// accounts for both named and indexed properties on Arrays.
|
||
|
|
} else {
|
||
|
|
return objEquiv(actual, expected);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function isUndefinedOrNull (value) {
|
||
|
|
return value === null || value === undefined;
|
||
|
|
}
|
||
|
|
|
||
|
|
function isArguments (object) {
|
||
|
|
return Object.prototype.toString.call(object) == '[object Arguments]';
|
||
|
|
}
|
||
|
|
|
||
|
|
function objEquiv (a, b) {
|
||
|
|
if (isUndefinedOrNull(a) || isUndefinedOrNull(b))
|
||
|
|
return false;
|
||
|
|
// an identical "prototype" property.
|
||
|
|
if (a.prototype !== b.prototype) return false;
|
||
|
|
//~~~I've managed to break Object.keys through screwy arguments passing.
|
||
|
|
// Converting to array solves the problem.
|
||
|
|
if (isArguments(a)) {
|
||
|
|
if (!isArguments(b)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
a = pSlice.call(a);
|
||
|
|
b = pSlice.call(b);
|
||
|
|
return _deepEqual(a, b);
|
||
|
|
}
|
||
|
|
try{
|
||
|
|
var ka = Object.keys(a),
|
||
|
|
kb = Object.keys(b),
|
||
|
|
key, i;
|
||
|
|
} catch (e) {//happens when one is a string literal and the other isn't
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
// having the same number of owned properties (keys incorporates hasOwnProperty)
|
||
|
|
if (ka.length != kb.length)
|
||
|
|
return false;
|
||
|
|
//the same set of keys (although not necessarily the same order),
|
||
|
|
ka.sort();
|
||
|
|
kb.sort();
|
||
|
|
//~~~cheap key test
|
||
|
|
for (i = ka.length - 1; i >= 0; i--) {
|
||
|
|
if (ka[i] != kb[i])
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
//equivalent values for every corresponding key, and
|
||
|
|
//~~~possibly expensive deep test
|
||
|
|
for (i = ka.length - 1; i >= 0; i--) {
|
||
|
|
key = ka[i];
|
||
|
|
if (!_deepEqual(a[key], b[key] ))
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|