1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-rest-nested-obj-yield-expr.js b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-rest-nested-obj-yield-expr.js
new file mode 100644
index 0000000000..a4c9290b7b
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-await-of/async-gen-decl-dstr-array-rest-nested-obj-yield-expr.js
@@ -0,0 +1,52 @@
+// |reftest| async
+// This file was procedurally generated from the following sources:
+// - src/dstr-assignment-for-await/array-rest-nested-obj-yield-expr.case
+// - src/dstr-assignment-for-await/async-generator/async-gen-decl.template
+/*---
+description: When a `yield` token appears within the Initializer of a nested destructuring assignment and within a generator function body, it should behave as a YieldExpression. (for-await-of statement in an async generator declaration)
+esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
+features: [generators, destructuring-binding, async-iteration]
+flags: [generated, async]
+info: |
+    IterationStatement :
+      for await ( LeftHandSideExpression of AssignmentExpression ) Statement
+
+    1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
+       AssignmentExpression, iterate).
+    2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
+       keyResult, assignment, labelSet).
+
+    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
+
+    [...]
+    5. If destructuring is true and if lhsKind is assignment, then
+       a. Assert: lhs is a LeftHandSideExpression.
+       b. Let assignmentPattern be the parse of the source text corresponding to
+          lhs using AssignmentPattern as the goal symbol.
+    [...]
+---*/
+let x;
+
+
+let iterCount = 0;
+async function * fn() {
+  for await ([...{ x = yield }] of [[{}]]) {
+    
+    iterCount += 1;
+  }
+}
+
+let iter = fn();
+
+iter.next().then(iterationResult => {
+  assert.sameValue(iterationResult.value, undefined);
+  assert.sameValue(iterationResult.done, false);
+  assert.sameValue(x, undefined);
+
+  iter.next(4).then(iterationResult => {
+    assert.sameValue(iterationResult.value, undefined);
+    assert.sameValue(iterationResult.done, true);
+    assert.sameValue(x, 4);
+  }).then($DONE, $DONE);
+});
+