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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/delegating-yield-3.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/delegating-yield-3.js | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/tests/non262/generators/delegating-yield-3.js b/js/src/tests/non262/generators/delegating-yield-3.js new file mode 100644 index 0000000000..624c12104c --- /dev/null +++ b/js/src/tests/non262/generators/delegating-yield-3.js @@ -0,0 +1,44 @@ +// Test yield* with iter.next and monkeypatching. + +function* g(n) { for (var i=0; i<n; i++) yield i; } +function* delegate(iter) { return yield* iter; } +var GeneratorObjectPrototype = Object.getPrototypeOf(g).prototype; +var GeneratorObjectPrototype_next = GeneratorObjectPrototype.next; + +// Monkeypatch next on an iterator. +var inner = g(20); +var outer = delegate(inner); +var innerNextFn = GeneratorObjectPrototype_next; +inner.next = function() { return innerNextFn.call(this); }; +assertIteratorNext(outer, 0); +assertIteratorNext(outer, 1); +innerNextFn = function() { return { patched: true }; }; +// 42 yielded directly without re-boxing. +assertEq(true, outer.next().patched); +// Outer generator not terminated. +assertEq(true, outer.next().patched); +// Restore. +innerNextFn = GeneratorObjectPrototype_next; +assertIteratorNext(outer, 2); +// Repatch. +innerNextFn = function() { return { value: 42, done: true }; }; +assertIteratorDone(outer, 42); + +// Monkeypunch next on the prototype. +var inner = g(20); +var outer = delegate(inner); +var innerNextFn = GeneratorObjectPrototype_next; +GeneratorObjectPrototype.next = function() { return innerNextFn.call(this); }; +assertIteratorNext(outer, 0); +assertIteratorNext(outer, 1); +innerNextFn = function() { return { patched: true }; }; +// 42 yielded directly without re-boxing. +assertEq(true, GeneratorObjectPrototype_next.call(outer).patched); +// Outer generator not terminated. +assertEq(true, GeneratorObjectPrototype_next.call(outer).patched); +// Restore. +innerNextFn = GeneratorObjectPrototype_next; +assertIteratorNext(outer, 2); + +if (typeof reportCompare == "function") + reportCompare(true, true); |