1 files changed, 89 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/async-arrow-function/unscopables-with.js b/js/src/tests/test262/language/expressions/async-arrow-function/unscopables-with.js
new file mode 100644
index 0000000000..09b90cd6bf
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/async-arrow-function/unscopables-with.js
@@ -0,0 +1,89 @@
+// |reftest| async
+// This file was procedurally generated from the following sources:
+// - src/function-forms/unscopables-with.case
+// - src/function-forms/default/async-arrow-function.template
+/*---
+description: Symbol.unscopables behavior across scope boundaries (async arrow function expression)
+esid: sec-async-arrow-function-definitions
+features: [globalThis, Symbol.unscopables, async-functions]
+flags: [generated, noStrict, async]
+info: |
+    14.7 Async Arrow Function Definitions
+
+    AsyncArrowFunction :
+      ...
+      CoverCallExpressionAndAsyncArrowHead => AsyncConciseBody
+
+    AsyncConciseBody :
+      { AsyncFunctionBody }
+
+    ...
+
+    Supplemental Syntax
+
+    When processing an instance of the production AsyncArrowFunction :
+    CoverCallExpressionAndAsyncArrowHead => AsyncConciseBody the interpretation of
+    CoverCallExpressionAndAsyncArrowHead is refined using the following grammar:
+
+    AsyncArrowHead :
+      async ArrowFormalParameters
+
+
+    ...
+    Let envRec be lex's EnvironmentRecord.
+    Let exists be ? envRec.HasBinding(name).
+
+    HasBinding
+
+    ...
+    If the withEnvironment flag of envRec is false, return true.
+    Let unscopables be ? Get(bindings, @@unscopables).
+    If Type(unscopables) is Object, then
+       Let blocked be ToBoolean(? Get(unscopables, N)).
+       If blocked is true, return false.
+
+    (The `with` Statement) Runtime Semantics: Evaluation
+
+    ...
+    Set the withEnvironment flag of newEnv’s EnvironmentRecord to true.
+    ...
+
+---*/
+let count = 0;
+var v = 1;
+globalThis[Symbol.unscopables] = {
+  v: true,
+};
+
+{
+  count++;
+
+
+var callCount = 0;
+
+// Stores a reference `ref` for case evaluation
+var ref = async (x) => {
+  count++;
+  with (globalThis) {
+    count++;
+    assert.sameValue(v, undefined, 'The value of `v` is expected to equal `undefined`');
+  }
+  count++;
+  var v = x;
+  with (globalThis) {
+    count++;
+    assert.sameValue(v, 10, 'The value of `v` is 10');
+    v = 20;
+  }
+  assert.sameValue(v, 20, 'The value of `v` is 20');
+  assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1');
+  callCount = callCount + 1;
+};
+
+ref(10).then(() => {
+  assert.sameValue(callCount, 1, 'async arrow function invoked exactly once')
+}).then($DONE, $DONE);
+
+  count++;
+}
+assert.sameValue(count, 6, 'The value of `count` is 6');