1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
// Tests that IteratorReturn is called when a for-of loop has an abrupt
// completion value during non-iterator code.
function test() {
var returnCalled = 0;
var returnCalledExpected = 0;
var iterable = {};
iterable[Symbol.iterator] = makeIterator({
ret: function() {
returnCalled++;
return {};
}
});
// break calls iter.return
for (var x of iterable)
break;
assertEq(returnCalled, ++returnCalledExpected);
// throw in body calls iter.return
assertThrowsValue(function() {
for (var x of iterable)
throw "in body";
}, "in body");
assertEq(returnCalled, ++returnCalledExpected);
// throw in lhs ref calls iter.return
function throwlhs() {
throw "in lhs";
}
assertThrowsValue(function() {
for ((throwlhs()) of iterable)
continue;
}, "in lhs");
assertEq(returnCalled, ++returnCalledExpected);
// throw in iter.return doesn't re-call iter.return
iterable[Symbol.iterator] = makeIterator({
ret: function() {
returnCalled++;
throw "in iter.return";
}
});
assertThrowsValue(function() {
for (var x of iterable)
break;
}, "in iter.return");
assertEq(returnCalled, ++returnCalledExpected);
// throw in iter.next doesn't call IteratorClose
iterable[Symbol.iterator] = makeIterator({
next: function() {
throw "in next";
}
});
assertThrowsValue(function() {
for (var x of iterable)
break;
}, "in next");
assertEq(returnCalled, returnCalledExpected);
// "return" must return an Object.
iterable[Symbol.iterator] = makeIterator({
ret: function() {
returnCalled++;
return 42;
}
});
assertThrowsInstanceOf(function() {
for (var x of iterable)
break;
}, TypeError);
assertEq(returnCalled, ++returnCalledExpected);
// continue doesn't call iter.return for the loop it's continuing
var i = 0;
iterable[Symbol.iterator] = makeIterator({
next: function() {
return { done: i++ > 5 };
},
ret: function() {
returnCalled++;
return {};
}
});
for (var x of iterable)
continue;
assertEq(returnCalled, returnCalledExpected);
// continue does call iter.return for loops it skips
i = 0;
L: do {
for (var x of iterable)
continue L;
} while (false);
assertEq(returnCalled, ++returnCalledExpected);
}
test();
if (typeof reportCompare === "function")
reportCompare(0, 0);
|
