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comparison: js/src/jit-test/tests/collections/Array-build-surfaces.js
js/src/jit-test/tests/collections/Array-build-surfaces.js
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:a557404b3a6d |
|---|---|
| 1 // Check superficial features of Array.build. | |
| 2 | |
| 3 if (getBuildConfiguration().parallelJS) { | |
| 4 load(libdir + "asserts.js"); | |
| 5 | |
| 6 var desc = Object.getOwnPropertyDescriptor(Array, "build"); | |
| 7 assertEq(desc.configurable, true); | |
| 8 assertEq(desc.enumerable, false); | |
| 9 assertEq(desc.writable, true); | |
| 10 assertEq(Array.build.length, 2); | |
| 11 assertThrowsInstanceOf(() => new Array.build(), TypeError); // not a constructor | |
| 12 | |
| 13 // Must pass a function to second argument. | |
| 14 for (let v of [undefined, null, false, "cow"]) | |
| 15 assertThrowsInstanceOf(() => Array.build(1, v), TypeError); | |
| 16 | |
| 17 // The first argument must be a legal length. | |
| 18 assertThrowsInstanceOf(() => Array.build(-1, function() {}), RangeError); | |
| 19 | |
| 20 // When the this-value passed in is not a constructor, the result is an array. | |
| 21 for (let v of [undefined, null, false, "cow"]) | |
| 22 assertEq(Array.isArray(Array.build.call(v, 1, function() {})), true); | |
| 23 } |
