js/src/jit-test/tests/for-of/semantics-09.js@6474c204b198
js/src/jit-test/tests/for-of/semantics-09.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 // The LHS of a for-of loop is not evaluated until after the .next() method returns.
3 var s;
4 function f() {
5 s += 'f';
6 return {};
7 }
9 // Test 1: .next() throws StopIteration right away. f is never called.
10 s = '';
11 for (f().x of [])
12 s += '.';
13 assertEq(s, '');
15 // Test 2: check proper interleaving of f calls, iterator.next() calls, and the loop body.
16 function g() {
17 s += 'g';
18 yield 0;
19 s += 'g';
20 yield 1;
21 s += 'g';
22 }
23 for (f().x of g())
24 s += '.';
25 assertEq(s, 'gf.gf.g');
