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Formalize which value is picked by _.unionBy and _.unionWith to pick the result from the first array in which it occurs.

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This commit is contained in:
Brandon Horst
2016-06-16 13:08:04 -04:00
committed by John-David Dalton
parent 9cabc7c222
commit 9605072200
2 changed files with 24 additions and 2 deletions
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20
test/test.js
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@@ -24541,6 +24541,13 @@
assert.deepEqual(args, [2.1]);
});
QUnit.test('should output values from the first possible array', function(assert) {
assert.expect(1);
var actual = _.unionBy([{ 'x': 1, 'y': 1 }], [{ 'x': 1, 'y': 2 }], 'x');
assert.deepEqual(actual, [{ 'x': 1, 'y': 1 }]);
});
}());
/*--------------------------------------------------------------------------*/
@@ -24557,6 +24564,19 @@
assert.deepEqual(actual, [objects[0], objects[1], others[0]]);
});
QUnit.test('should output values from the first possible array', function(assert) {
assert.expect(1);
var objects = [{ 'x': 1, 'y': 1 }],
others = [{ 'x': 1, 'y': 2 }];
var actual = _.unionWith(objects, others, function(a, b) {
return a.x == b.x;
});
assert.deepEqual(actual, [{ 'x': 1, 'y': 1 }]);
});
}());
/*--------------------------------------------------------------------------*/