summaryrefslogtreecommitdiffstats
path: root/js/src/tests/non262/generators/delegating-yield-1.js
diff options
context:
space:
mode:
Diffstat (limited to 'js/src/tests/non262/generators/delegating-yield-1.js')
-rw-r--r--js/src/tests/non262/generators/delegating-yield-1.js42
1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/tests/non262/generators/delegating-yield-1.js b/js/src/tests/non262/generators/delegating-yield-1.js
new file mode 100644
index 0000000000..f9df1d7f89
--- /dev/null
+++ b/js/src/tests/non262/generators/delegating-yield-1.js
@@ -0,0 +1,42 @@
+// This file was written by Andy Wingo <wingo@igalia.com> and originally
+// contributed to V8 as generators-objects.js, available here:
+//
+// http://code.google.com/p/v8/source/browse/branches/bleeding_edge/test/mjsunit/harmony/generators-objects.js
+
+// Test that yield* re-yields received results without re-boxing.
+
+function results(results) {
+ var i = 0;
+ function next() {
+ return results[i++];
+ }
+ var iter = { next: next }
+ var ret = {};
+ ret[Symbol.iterator] = function () { return iter; }
+ return ret;
+}
+
+function* yield_results(expected) {
+ return yield* results(expected);
+}
+
+function collect_results(iterable) {
+ var ret = [];
+ var result;
+ var iter = iterable[Symbol.iterator]();
+ do {
+ result = iter.next();
+ ret.push(result);
+ } while (!result.done);
+ return ret;
+}
+
+// We have to put a full result for the end, because the return will re-box.
+var expected = [{value: 1}, {value: 34, done: true}];
+
+// Sanity check.
+assertDeepEq(expected, collect_results(results(expected)));
+assertDeepEq(expected, collect_results(yield_results(expected)));
+
+if (typeof reportCompare == "function")
+ reportCompare(true, true);