js/src/jit-test/tests/collections/Array-build-surfaces.js@6474c204b198 (annotated)
js/src/jit-test/tests/collections/Array-build-surfaces.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Check superficial features of Array.build. |
| michael@0 | 2 | |
| michael@0 | 3 | if (getBuildConfiguration().parallelJS) { |
| michael@0 | 4 | load(libdir + "asserts.js"); |
| michael@0 | 5 | |
| michael@0 | 6 | var desc = Object.getOwnPropertyDescriptor(Array, "build"); |
| michael@0 | 7 | assertEq(desc.configurable, true); |
| michael@0 | 8 | assertEq(desc.enumerable, false); |
| michael@0 | 9 | assertEq(desc.writable, true); |
| michael@0 | 10 | assertEq(Array.build.length, 2); |
| michael@0 | 11 | assertThrowsInstanceOf(() => new Array.build(), TypeError); // not a constructor |
| michael@0 | 12 | |
| michael@0 | 13 | // Must pass a function to second argument. |
| michael@0 | 14 | for (let v of [undefined, null, false, "cow"]) |
| michael@0 | 15 | assertThrowsInstanceOf(() => Array.build(1, v), TypeError); |
| michael@0 | 16 | |
| michael@0 | 17 | // The first argument must be a legal length. |
| michael@0 | 18 | assertThrowsInstanceOf(() => Array.build(-1, function() {}), RangeError); |
| michael@0 | 19 | |
| michael@0 | 20 | // When the this-value passed in is not a constructor, the result is an array. |
| michael@0 | 21 | for (let v of [undefined, null, false, "cow"]) |
| michael@0 | 22 | assertEq(Array.isArray(Array.build.call(v, 1, function() {})), true); |
| michael@0 | 23 | } |
