diff options
Diffstat (limited to 'js/src/tests/non262/Array/from_realms.js')
-rw-r--r-- | js/src/tests/non262/Array/from_realms.js | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/non262/Array/from_realms.js b/js/src/tests/non262/Array/from_realms.js new file mode 100644 index 0000000000..e3a8636063 --- /dev/null +++ b/js/src/tests/non262/Array/from_realms.js @@ -0,0 +1,37 @@ +/* Any copyright is dedicated to the Public Domain. + * http://creativecommons.org/licenses/publicdomain/ */ + +if (typeof newGlobal === 'function') { + // G.Array.from, where G is any global, produces an array whose prototype + // is G.Array.prototype. + var g = newGlobal(); + var ga = g.Array.from([1, 2, 3]); + assertEq(ga instanceof g.Array, true); + + // Even if G.Array is not passed in as the 'this' value to the call. + var from = g.Array.from + var ga2 = from([1, 2, 3]); + assertEq(ga2 instanceof g.Array, true); + + // Array.from can be applied to a constructor from another realm. + var p = Array.from.call(g.Array, [1, 2, 3]); + assertEq(p instanceof g.Array, true); + var q = g.Array.from.call(Array, [3, 4, 5]); + assertEq(q instanceof Array, true); + + // The default 'this' value received by a non-strict mapping function is + // that function's global, not Array.from's global or the caller's global. + var h = newGlobal(), result = undefined; + h.mainGlobal = this; + h.eval("function f() { mainGlobal.result = this; }"); + g.Array.from.call(Array, [5, 6, 7], h.f); + // (Give each global in the test a name, for better error messages. But use + // globalName, because window.name is complicated.) + this.globalName = "main"; + g.globalName = "g"; + h.globalName = "h"; + assertEq(result.globalName, "h"); +} + +if (typeof reportCompare === 'function') + reportCompare(0, 0); |