1 files changed, 58 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/ShadowRealm/prototype/evaluate/wrapped-function-multiple-different-realms-nested.js b/js/src/tests/test262/built-ins/ShadowRealm/prototype/evaluate/wrapped-function-multiple-different-realms-nested.js
new file mode 100644
index 0000000000..ab39ff6033
--- /dev/null
+++ b/js/src/tests/test262/built-ins/ShadowRealm/prototype/evaluate/wrapped-function-multiple-different-realms-nested.js
@@ -0,0 +1,58 @@
+// |reftest| shell-option(--enable-shadow-realms) skip-if(!xulRuntime.shell) -- requires shell-options
+// Copyright (C) 2021 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-shadowrealm.prototype.evaluate
+description: >
+  ShadowRealm can wrap a function to multiple nested realms.
+features: [ShadowRealm]
+---*/
+assert.sameValue(
+  typeof ShadowRealm.prototype.evaluate,
+  'function',
+  'This test must fail if ShadowRealm.prototype.evaluate is not a function'
+);
+
+globalThis.count = 0;
+const realm1 = new ShadowRealm();
+
+const r1wrapped = realm1.evaluate(`
+  globalThis.count = 0;
+  () => globalThis.count += 1;
+`);
+
+const realm2Evaluate = realm1.evaluate(`
+  const realm2 = new ShadowRealm();
+
+  (str) => realm2.evaluate(str);
+`);
+
+const r2wrapper = realm2Evaluate(`
+  globalThis.wrapped = undefined;
+  globalThis.count = 0; // Bait
+  (fn) => globalThis.wrapped = fn;
+`);
+
+const rewrapped = r2wrapper(r1wrapped);
+
+assert.notSameValue(rewrapped, r1wrapped, 'rewrapped !== r1wrapped');
+
+const r2wrapped = realm2Evaluate('globalThis.wrapped');
+
+assert.notSameValue(r2wrapped, r1wrapped, 'r2wrapped !== r1wrapped');
+assert.notSameValue(r2wrapped, rewrapped, 'r2wrapped !== rewrapped');
+
+assert.sameValue(realm1.evaluate('globalThis.count'), 0, `getting wrapped function won't trigger a call`);
+
+assert.sameValue(r2wrapped(), 1, 'call from r2 wrapped (r2wrapped) cycles back to r1');
+
+assert.sameValue(realm1.evaluate('globalThis.count'), 1, 'effects produced in a third realm, #1');
+
+assert.sameValue(rewrapped(), 2, 'call from r2 wrapped (rewrapped) cycles back to r1');
+
+assert.sameValue(realm1.evaluate('globalThis.count'), 2, 'effects produced in a third realm, #2');
+
+assert.sameValue(realm2Evaluate('globalThis.count'), 0, 'no side effects produced in the wrong realm (realm2)');
+assert.sameValue(globalThis.count, 0, 'no side effects produced in the wrong realm (main realm)');
+
+reportCompare(0, 0);