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actual = '';
expected = '3,6,9,12,15,18,';
function slice(a, b)
{
//return { x: a + ':' + b };
return b;
}
function f()
{
var length = 20;
var index = 0;
function get3() {
//appendToActual("get3 " + index);
if (length - index < 3)
return null;
return slice(index, index += 3);
}
var bytes = null;
while (bytes = get3()) {
appendToActual(bytes);
}
}
f();
assertEq(actual, expected)