1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/object/dstr/async-gen-meth-dflt-ary-ptrn-elem-id-init-undef.js b/js/src/tests/test262/language/expressions/object/dstr/async-gen-meth-dflt-ary-ptrn-elem-id-init-undef.js
new file mode 100644
index 0000000000..adfd19ec28
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/object/dstr/async-gen-meth-dflt-ary-ptrn-elem-id-init-undef.js
@@ -0,0 +1,49 @@
+// |reftest| async
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding/ary-ptrn-elem-id-init-undef.case
+// - src/dstr-binding/default/async-gen-method-dflt.template
+/*---
+description: Destructuring initializer with an undefined value (async generator method (default parameter))
+esid: sec-asyncgenerator-definitions-propertydefinitionevaluation
+features: [async-iteration]
+flags: [generated, async]
+info: |
+    AsyncGeneratorMethod :
+        async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
+            { AsyncGeneratorBody }
+
+    1. Let propKey be the result of evaluating PropertyName.
+    2. ReturnIfAbrupt(propKey).
+    3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
+       Otherwise let strict be false.
+    4. Let scope be the running execution context's LexicalEnvironment.
+    5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
+       AsyncGeneratorBody, scope, strict).
+    [...]
+
+
+    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
+
+    SingleNameBinding : BindingIdentifier Initializeropt
+
+    [...]
+    6. If Initializer is present and v is undefined, then
+       a. Let defaultValue be the result of evaluating Initializer.
+       b. Let v be GetValue(defaultValue).
+       [...]
+    7. If environment is undefined, return PutValue(lhs, v).
+    8. Return InitializeReferencedBinding(lhs, v).
+---*/
+
+
+var callCount = 0;
+var obj = {
+  async *method([x = 23] = [undefined]) {
+    assert.sameValue(x, 23);
+    callCount = callCount + 1;
+  }
+};
+
+obj.method().next().then(() => {
+    assert.sameValue(callCount, 1, 'invoked exactly once');
+}).then($DONE, $DONE);