1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/module-code/top-level-await/while-dynamic-evaluation.js b/js/src/tests/test262/language/module-code/top-level-await/while-dynamic-evaluation.js
new file mode 100644
index 0000000000..5641e7ded9
--- /dev/null
+++ b/js/src/tests/test262/language/module-code/top-level-await/while-dynamic-evaluation.js
@@ -0,0 +1,49 @@
+// |reftest| shell-option(--enable-top-level-await) skip-if(!xulRuntime.shell) module async -- requires shell-options
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+  Evaluate Await expression for IfStatement
+info: |
+  ModuleItem:
+    StatementListItem[~Yield, +Await, ~Return]
+
+  ...
+
+  UnaryExpression[Yield, Await]
+    [+Await]AwaitExpression[?Yield]
+
+  AwaitExpression[Yield]:
+    await UnaryExpression[?Yield, +Await]
+esid: prod-AwaitExpression
+flags: [module, async]
+features: [top-level-await]
+---*/
+
+var values = [];
+var p = Promise.resolve().then(() => {
+  // Replaces p!
+  p = Promise.resolve().then(() => {
+    p = Promise.resolve().then(() => {
+      values.push(3);
+      return false;
+    });
+
+    values.push(2);
+    return true;
+  })
+
+  values.push(1);
+
+  return true;
+});
+
+while (await p) {}
+
+assert.sameValue(values.length, 3);
+assert.sameValue(values[0], 1);
+assert.sameValue(values[1], 2);
+assert.sameValue(values[2], 3);
+
+$DONE();