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js/src/jit-test/tests/basic/spread-call-length.js@b8a032363ba2 (annotated)

js/src/jit-test/tests/basic/spread-call-length.js

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	load(libdir + 'iteration.js');
michael@0	2
michael@0	3	let makeCall = farg => Function("f", "arg", "return f(" + farg + ");");
michael@0	4	let makeFunCall = farg => Function("f", "arg", "return f.call(null, " + farg + ");");
michael@0	5	let makeNew = farg => Function("f", "arg", "return new f(" + farg + ").length;");
michael@0	6
michael@0	7	function checkLength(f, makeFn) {
michael@0	8	assertEq(makeFn("...[1, 2, 3]")(f), 3);
michael@0	9	assertEq(makeFn("1, ...[2], 3")(f), 3);
michael@0	10	assertEq(makeFn("1, ...[2], ...[3]")(f), 3);
michael@0	11	assertEq(makeFn("1, ...[2, 3]")(f), 3);
michael@0	12	assertEq(makeFn("1, ...[], 2, 3")(f), 3);
michael@0	13
michael@0	14	assertEq(makeFn("...[1]")(f), 1);
michael@0	15	assertEq(makeFn("...[1, 2]")(f), 2);
michael@0	16	assertEq(makeFn("...[1, 2, 3, 4]")(f), 4);
michael@0	17	assertEq(makeFn("1, ...[2, 3, 4], 5")(f), 5);
michael@0	18
michael@0	19	assertEq(makeFn("...[undefined]")(f), 1);
michael@0	20
michael@0	21	// other iterable objects
michael@0	22	assertEq(makeFn("...arg")(f, new Int32Array([1, 2, 3])), 3);
michael@0	23	assertEq(makeFn("...arg")(f, "abc"), 3);
michael@0	24	assertEq(makeFn("...arg")(f, [1, 2, 3][std_iterator]()), 3);
michael@0	25	assertEq(makeFn("...arg")(f, Set([1, 2, 3])), 3);
michael@0	26	assertEq(makeFn("...arg")(f, Map([["a", "A"], ["b", "B"], ["c", "C"]])), 3);
michael@0	27	let itr = {};
michael@0	28	itr[std_iterator] = function() {
michael@0	29	return {
michael@0	30	i: 1,
michael@0	31	next: function() {
michael@0	32	if (this.i < 4)
michael@0	33	return { value: this.i++, done: false };
michael@0	34	else
michael@0	35	return { value: undefined, done: true };
michael@0	36	}
michael@0	37	};
michael@0	38	}
michael@0	39	assertEq(makeFn("...arg")(f, itr), 3);
michael@0	40	function* gen() {
michael@0	41	for (let i = 1; i < 4; i ++)
michael@0	42	yield i;
michael@0	43	}
michael@0	44	assertEq(makeFn("...arg")(f, gen()), 3);
michael@0	45	}
michael@0	46
michael@0	47	checkLength(function(x) arguments.length, makeCall);
michael@0	48	checkLength(function(x) arguments.length, makeFunCall);
michael@0	49	checkLength((x) => arguments.length, makeCall);
michael@0	50	checkLength((x) => arguments.length, makeFunCall);
michael@0	51	function lengthClass(x) {
michael@0	52	this.length = arguments.length;
michael@0	53	}
michael@0	54	checkLength(lengthClass, makeNew);