1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit-test/tests/for-of/decompiler.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,36 @@
1.4 +// The decompiler correctly handles for-of loops.
1.5 +
1.6 +function tokens(code) {
1.7 + var arr = [];
1.8 + var s = code.replace(/\w+|[^\s]/g, function (tok) { arr.push(tok); return ""; });
1.9 + assertEq(s.trim(), "", "tokens() should find all tokens in code: " + uneval(code));
1.10 + return arr;
1.11 +}
1.12 +
1.13 +function test(code) {
1.14 + var before = "function f() { " + code + " }";
1.15 + var after = eval("(" + before + ")").toString();
1.16 + assertEq(tokens(before).join(" "), tokens(after).join(" "), "decompiler failed to round-trip");
1.17 +}
1.18 +
1.19 +// statements
1.20 +test("for (a of b) { f(a); }");
1.21 +test("for (a of b) { f(a); g(a); }");
1.22 +
1.23 +// for-of with "in" operator nearby
1.24 +test("for (a of b in c ? c : c.items()) { f(a); }");
1.25 +
1.26 +// destructuring
1.27 +test("for ([a, b] of c) { a.m(b); }");
1.28 +
1.29 +// for-let-of
1.30 +test("for (let a of b) { f(a); }");
1.31 +test("for (let [a, b] of c) { a.m(b); }");
1.32 +
1.33 +// array comprehensions
1.34 +test("return [a for (a of b)];");
1.35 +test("return [[b, a] for ([a, b] of c.items())];");
1.36 +
1.37 +// generator expressions
1.38 +test("return (a for (a of b));");
1.39 +
