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enhance #extend to allow taking multiple source objects.

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This is done in jquery, extjs, and others as well.

added tests, no docs
This commit is contained in:
Mike Frawley
2010-01-24 11:53:30 -06:00
committed by Jeremy Ashkenas
parent 8c6694c242
commit 4085b68be4
2 changed files with 15 additions and 7 deletions
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11
test/objects.js
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@@ -25,9 +25,14 @@ $(document).ready(function() {
});
test("objects: extend", function() {
var source = {name : 'moe'}, dest = {age : 50};
_.extend(dest, source);
equals(dest.name, 'moe', 'can extend an object with the attributes of another');
var result;
equals(_.extend({}, {a:'b'}).a, 'b', 'can extend an object with the attributes of another');
equals(_.extend({a:'x'}, {a:'b'}).a, 'b', 'properties in source override destination');
equals(_.extend({x:'x'}, {a:'b'}).x, 'x', 'properties not in source dont get overriden');
result = _.extend({x:'x'}, {a:'a'}, {b:'b'});
ok(_.isEqual(result, {x:'x', a:'a', b:'b'}), 'can extend from multiple source objects');
result = _.extend({x:'x'}, {a:'a', x:2}, {a:'b'});
ok(_.isEqual(result, {x:2, a:'b'}), 'extending from multiple source objects last property trumps');
});
test("objects: clone", function() {