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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/tests/non262/generators/yield-star-iterator-close.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/generators/yield-star-iterator-close.js | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/js/src/tests/non262/generators/yield-star-iterator-close.js b/js/src/tests/non262/generators/yield-star-iterator-close.js new file mode 100644 index 0000000000..91ad31cb64 --- /dev/null +++ b/js/src/tests/non262/generators/yield-star-iterator-close.js @@ -0,0 +1,153 @@ +// Tests that the "return" method on iterators is called in yield* +// expressions. + +function test() { + var returnCalled = 0; + var returnCalledExpected = 0; + var nextCalled = 0; + var nextCalledExpected = 0; + var throwCalled = 0; + var throwCalledExpected = 0; + var iterable = {}; + iterable[Symbol.iterator] = makeIterator({ + next: function() { + nextCalled++; + return { done: false }; + }, + ret: function() { + returnCalled++; + return { done: true, value: "iter.return" }; + } + }); + + function* y() { + yield* iterable; + } + + // G.p.throw on an iterator without "throw" calls IteratorClose. + var g1 = y(); + g1.next(); + assertThrowsInstanceOf(function() { + g1.throw("foo"); + }, TypeError); + assertEq(returnCalled, ++returnCalledExpected); + assertEq(nextCalled, ++nextCalledExpected); + g1.next(); + assertEq(nextCalled, nextCalledExpected); + + // G.p.return calls "return", and if the result.done is true, return the + // result. + var g2 = y(); + g2.next(); + var v2 = g2.return("test return"); + assertEq(v2.done, true); + assertEq(v2.value, "iter.return"); + assertEq(returnCalled, ++returnCalledExpected); + assertEq(nextCalled, ++nextCalledExpected); + g2.next(); + assertEq(nextCalled, nextCalledExpected); + + // G.p.return calls "return", and if the result.done is false, continue + // yielding. + iterable[Symbol.iterator] = makeIterator({ + next: function() { + nextCalled++; + return { done: false }; + }, + ret: function() { + returnCalled++; + return { done: false, value: "iter.return" }; + } + }); + var g3 = y(); + g3.next(); + var v3 = g3.return("test return"); + assertEq(v3.done, false); + assertEq(v3.value, "iter.return"); + assertEq(returnCalled, ++returnCalledExpected); + assertEq(nextCalled, ++nextCalledExpected); + g3.next(); + assertEq(nextCalled, ++nextCalledExpected); + + // G.p.return throwing does not re-call iter.return. + iterable[Symbol.iterator] = makeIterator({ + ret: function() { + returnCalled++; + throw "in iter.return"; + } + }); + var g4 = y(); + g4.next(); + assertThrowsValue(function() { + g4.return("in test"); + }, "in iter.return"); + assertEq(returnCalled, ++returnCalledExpected); + + // G.p.return expects iter.return to return an Object. + iterable[Symbol.iterator] = makeIterator({ + ret: function() { + returnCalled++; + return 42; + } + }); + var g5 = y(); + g5.next(); + assertThrowsInstanceOf(function() { + g5.return("foo"); + }, TypeError); + assertEq(returnCalled, ++returnCalledExpected); + + // IteratorClose expects iter.return to return an Object. + var g6 = y(); + g6.next(); + var exc; + try { + g6.throw("foo"); + } catch (e) { + exc = e; + } finally { + assertEq(exc instanceof TypeError, true); + // The message test is here because instanceof TypeError doesn't + // distinguish the non-Object return TypeError and the + // throw-method-is-not-defined iterator protocol error. + assertEq(exc.toString().indexOf("non-object") > 0, true); + } + assertEq(returnCalled, ++returnCalledExpected); + + // G.p.return passes its argument to "return". + iterable[Symbol.iterator] = makeIterator({ + ret: function(x) { + assertEq(x, "in test"); + returnCalled++; + return { done: true }; + } + }); + var g7 = y(); + g7.next(); + g7.return("in test"); + assertEq(returnCalled, ++returnCalledExpected); + + // If a throw method is present, do not call "return". + iterable[Symbol.iterator] = makeIterator({ + throw: function(e) { + throwCalled++; + throw e; + }, + ret: function(x) { + returnCalled++; + return { done: true }; + } + }); + var g8 = y(); + g8.next(); + assertThrowsValue(function() { + g8.throw("foo"); + }, "foo"); + assertEq(throwCalled, ++throwCalledExpected); + assertEq(returnCalled, returnCalledExpected); +} + +test(); + +if (typeof reportCompare === "function") + reportCompare(0, 0); |