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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/TypedArray/from_this.js | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/tests/non262/TypedArray/from_this.js b/js/src/tests/non262/TypedArray/from_this.js new file mode 100644 index 0000000000..95af053b8d --- /dev/null +++ b/js/src/tests/non262/TypedArray/from_this.js @@ -0,0 +1,59 @@ +for (var constructor of anyTypedArrayConstructors) { + // The third argument to %TypedArray%.from is passed as the 'this' value to the + // mapping function. + var hits = 0, obj = {}; + function f(x) { + assertEq(this, obj); + hits++; + } + constructor.from(["a", "b", "c"], f, obj); + assertEq(hits, 3); + + // Without an argument, undefined is passed... + hits = 0; + function gs(x) { + "use strict"; + assertEq(this, undefined); + hits++; + } + constructor.from("def", gs); + assertEq(hits, 3); + + // ...and if the mapping function is non-strict, that means the global is + // passed. + var global = this; + hits = 0; + function g(x) { + assertEq(this, global); + hits++; + } + constructor.from("ghi", g); + assertEq(hits, 3); + + // A primitive value can be passed. + for (var v of [0, "str", undefined]) { + hits = 0; + var mapfn = function h(x) { + "use strict"; + assertEq(this, v); + hits++; + }; + constructor.from("pq", mapfn, v); + assertEq(hits, 2); + } + + // ...and if the mapping function is non-strict, primitive values will + // be wrapped to objects. + for (var v of [0, "str", true]) { + hits = 0; + var mapfn = function h(x) { + assertDeepEq(this, Object(v)); + hits++; + }; + constructor.from("pq", mapfn, v); + assertEq(hits, 2); + } +} + +if (typeof reportCompare === "function") + reportCompare(true, true); |