1 files changed, 76 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-let-ary-init-iter-close.js b/js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-let-ary-init-iter-close.js
new file mode 100644
index 0000000000..9431b89ad5
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-await-of/async-gen-dstr-let-ary-init-iter-close.js
@@ -0,0 +1,76 @@
+// |reftest| async
+// This file was procedurally generated from the following sources:
+// - src/dstr-binding-for-await/ary-init-iter-close.case
+// - src/dstr-binding-for-await/default/for-await-of-async-gen-let.template
+/*---
+description: Iterator is closed when not exhausted by pattern evaluation (for-await-of statement)
+esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
+features: [Symbol.iterator, destructuring-binding, async-iteration]
+flags: [generated, async]
+info: |
+    IterationStatement :
+        for await ( ForDeclaration of AssignmentExpression ) Statement
+
+    [...]
+    2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
+        lexicalBinding, labelSet, async).
+
+    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
+
+    [...]
+    4. Let destructuring be IsDestructuring of lhs.
+    [...]
+    6. Repeat
+       [...]
+       j. If destructuring is false, then
+          [...]
+       k. Else
+          i. If lhsKind is assignment, then
+             [...]
+          ii. Else if lhsKind is varBinding, then
+              [...]
+          iii. Else,
+               1. Assert: lhsKind is lexicalBinding.
+               2. Assert: lhs is a ForDeclaration.
+               3. Let status be the result of performing BindingInitialization
+                  for lhs passing nextValue and iterationEnv as arguments.
+          [...]
+
+    13.3.3.5 Runtime Semantics: BindingInitialization
+
+    BindingPattern : ArrayBindingPattern
+
+    [...]
+    4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
+       result).
+    [...]
+
+---*/
+var doneCallCount = 0;
+var iter = {};
+iter[Symbol.iterator] = function() {
+  return {
+    next() {
+      return { value: null, done: false };
+    },
+    return() {
+      doneCallCount += 1;
+      return {};
+    }
+  };
+};
+
+var iterCount = 0;
+
+async function *fn() {
+  for await (let [x] of [iter]) {
+    assert.sameValue(doneCallCount, 1);
+
+    iterCount += 1;
+  }
+}
+
+fn().next()
+  .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
+  .then($DONE, $DONE);
+