1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/ShadowRealm/instance.js b/js/src/tests/test262/built-ins/ShadowRealm/instance.js
new file mode 100644
index 0000000000..41e1783e00
--- /dev/null
+++ b/js/src/tests/test262/built-ins/ShadowRealm/instance.js
@@ -0,0 +1,36 @@
+// |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-constructor
+description: >
+  new ShadowRealm() returns a shadow realm instance
+info: |
+  ShadowRealm ( )
+
+  ...
+  2. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%ShadowRealm.prototype%",
+  « [[ShadowRealm]], [[ExecutionContext]] »).
+  ...
+  13. Return O.
+features: [ShadowRealm]
+---*/
+assert.sameValue(
+  typeof ShadowRealm,
+  'function',
+  'This test must fail if ShadowRealm is not a function'
+);
+
+var realm = new ShadowRealm();
+
+assert(realm instanceof ShadowRealm);
+assert.sameValue(
+  Object.getPrototypeOf(realm),
+  ShadowRealm.prototype,
+  '[[Prototype]] is set to %ShadowRealm.prototype%'
+);
+
+var otherRealm = new ShadowRealm();
+assert.notSameValue(realm, otherRealm, 'each instance is different');
+
+reportCompare(0, 0);