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-rw-r--r--js/src/tests/ecma_6/Generators/delegating-yield-7.js38
1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Generators/delegating-yield-7.js b/js/src/tests/ecma_6/Generators/delegating-yield-7.js
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index 000000000..f7c9e86cc
--- /dev/null
+++ b/js/src/tests/ecma_6/Generators/delegating-yield-7.js
@@ -0,0 +1,38 @@
+// The iteratee of yield* can be a proxy.
+
+function results(results) {
+ var i = 0;
+ function iterator() {
+ return this;
+ }
+ function next() {
+ return results[i++];
+ }
+ var ret = { next: next }
+ ret[Symbol.iterator] = iterator;
+ return ret;
+}
+
+function* yield_results(expected) {
+ return yield* new Proxy(results(expected), {});
+}
+
+function collect_results(iter) {
+ var ret = [];
+ var result;
+ 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);