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Ensure _.sortBy performs a stable sort. [closes #59]

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Former-commit-id: 09c5ff85ef0f1d054579ec4260a7f76d9c0da281
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John-David Dalton
2012-08-16 23:24:59 -07:00
parent 83d08e3aba
commit fab2d69fce
3 changed files with 36 additions and 6 deletions
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22
test/test.js
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@@ -1112,6 +1112,28 @@
QUnit.module('lodash.sortBy');
(function() {
test('should perform a stable sort', function() {
function Pair(x, y) {
this.x = x;
this.y = y;
}
var collection = [
new Pair(1, 1), new Pair(1, 2),
new Pair(1, 3), new Pair(1, 4),
new Pair(1, 5), new Pair(1, 6),
new Pair(2, 1), new Pair(2, 2),
new Pair(2, 3), new Pair(2, 4),
new Pair(2, 5), new Pair(2, 6)
];
var actual = _.sortBy(collection, function(pair) {
return pair.x;
});
deepEqual(actual, collection);
});
test('supports the `thisArg` argument', function() {
var actual = _.sortBy([1, 2, 3], function(num) {
return this.sin(num);