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// The LHS of a for-of loop is not evaluated until after the .next() method returns.
var s;
function f() {
s += 'f';
return {};
}
// Test 1: .next() throws StopIteration right away. f is never called.
s = '';
for (f().x of [])
s += '.';
assertEq(s, '');
// Test 2: check proper interleaving of f calls, iterator.next() calls, and the loop body.
function g() {
s += 'g';
yield 0;
s += 'g';
yield 1;
s += 'g';
}
for (f().x of g())
s += '.';
assertEq(s, 'gf.gf.g');
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