1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/ShadowRealm/prototype/evaluate/no-conditional-strict-mode.js b/js/src/tests/test262/built-ins/ShadowRealm/prototype/evaluate/no-conditional-strict-mode.js
new file mode 100644
index 0000000000..70030f0f93
--- /dev/null
+++ b/js/src/tests/test262/built-ins/ShadowRealm/prototype/evaluate/no-conditional-strict-mode.js
@@ -0,0 +1,37 @@
+// |reftest| shell-option(--enable-shadow-realms) skip-if(!xulRuntime.shell) -- requires shell-options
+// Copyright (C) 2021 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-shadowrealm.prototype.evaluate
+description: >
+  The new realm has no conditional strict mode based on its outer realm
+info: |
+  This test should always run with the outer realm in both strict and non
+  strict mode to verify the realm code starts in non-strict mode.
+features: [ShadowRealm]
+---*/
+
+assert.sameValue(
+  typeof ShadowRealm.prototype.evaluate,
+  'function',
+  'This test must fail if ShadowRealm.prototype.evaluate is not a function'
+);
+
+const r = new ShadowRealm();
+
+const res = r.evaluate(`
+  function lol() {
+    arguments = 42; // This would be a SyntaxError if in strict mode
+
+    return arguments;
+  }
+  lol;
+`);
+
+assert.sameValue(res(), 42);
+
+const res2 = r.evaluate('var public = 1; 42');
+
+assert.sameValue(res2, 42);
+
+reportCompare(0, 0);