1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/set/trap-is-missing-target-is-proxy.js b/js/src/tests/test262/built-ins/Proxy/set/trap-is-missing-target-is-proxy.js
new file mode 100644
index 0000000000..1ef5cd59ac
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+++ b/js/src/tests/test262/built-ins/Proxy/set/trap-is-missing-target-is-proxy.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-proxy-object-internal-methods-and-internal-slots-set-p-v-receiver
+description: >
+  If "set" trap is null or undefined, [[Set]] call is properly
+  forwarded to [[ProxyTarget]] (which is also a Proxy object).
+info: |
+  [[Set]] ( P, V, Receiver )
+
+  [...]
+  5. Let target be O.[[ProxyTarget]].
+  6. Let trap be ? GetMethod(handler, "set").
+  7. If trap is undefined, then
+    a. Return ? target.[[Set]](P, V, Receiver).
+features: [Proxy, Reflect]
+---*/
+
+var barValue;
+var plainObject = {
+  get foo() {},
+  set bar(value) {
+    barValue = value;
+  },
+};
+
+var plainObjectTarget = new Proxy(plainObject, {});
+var plainObjectProxy = new Proxy(plainObjectTarget, {});
+
+plainObjectProxy.bar = 1;
+assert.sameValue(barValue, 1);
+
+assert.throws(TypeError, function() {
+  "use strict";
+  plainObjectProxy.foo = 2;
+});
+
+
+var regExp = /(?:)/g;
+var regExpTarget = new Proxy(regExp, {});
+var regExpProxy = new Proxy(regExpTarget, {});
+
+assert(!Reflect.set(regExpProxy, "global", true));
+
+regExpProxy.lastIndex = 1;
+assert.sameValue(regExp.lastIndex, 1);
+
+reportCompare(0, 0);