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Rewrite _.isEqual and add support for comparing cyclic structures.

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Kit Goncharov
2011-07-12 19:42:36 -06:00
parent 727db393d5
commit 5c2c3ce464
2 changed files with 97 additions and 40 deletions
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40
test/objects.js
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@@ -82,6 +82,46 @@ $(document).ready(function() {
ok(!_.isEqual({x: 1, y: undefined}, {x: 1, z: 2}), 'objects with the same number of undefined keys are not equal');
ok(!_.isEqual(_({x: 1, y: undefined}).chain(), _({x: 1, z: 2}).chain()), 'wrapped objects are not equal');
equals(_({x: 1, y: 2}).chain().isEqual(_({x: 1, y: 2}).chain()).value(), true, 'wrapped objects are equal');
// Objects with circular references.
var circularA = {'abc': null}, circularB = {'abc': null};
circularA.abc = circularA;
circularB.abc = circularB;
ok(_.isEqual(circularA, circularB), 'objects with a circular reference');
circularA.def = 1;
circularB.def = 1;
ok(_.isEqual(circularA, circularB), 'objects with identical properties and a circular reference');
circularA.def = 1;
circularB.def = 0;
ok(!_.isEqual(circularA, circularB), 'objects with different properties and a circular reference');
// Arrays with circular references.
circularA = [];
circularB = [];
circularA.push(circularA);
circularB.push(circularB);
ok(_.isEqual(circularA, circularB), 'arrays with a circular reference');
circularA.push('abc');
circularB.push('abc');
ok(_.isEqual(circularA, circularB), 'arrays with identical indices and a circular reference');
circularA.push('hello');
circularB.push('goodbye');
ok(!_.isEqual(circularA, circularB), 'arrays with different properties and a circular reference');
// Hybrid cyclic structures.
circularA = [{'abc': null}];
circularB = [{'abc': null}];
circularA[0].abc = circularA;
circularB[0].abc = circularB;
circularA.push(circularA);
circularB.push(circularB);
ok(_.isEqual(circularA, circularB), 'cyclic structure');
circularA[0].def = 1;
circularB[0].def = 1;
ok(_.isEqual(circularA, circularB), 'cyclic structure with identical properties');
circularA[0].def = 1;
circularB[0].def = 0;
ok(!_.isEqual(circularA, circularB), 'cyclic structure with different properties');
});
test("objects: isEmpty", function() {