1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/computed-property-names/class/accessor/setter-duplicates.js b/js/src/tests/test262/language/computed-property-names/class/accessor/setter-duplicates.js
new file mode 100644
index 0000000000..f42801874e
--- /dev/null
+++ b/js/src/tests/test262/language/computed-property-names/class/accessor/setter-duplicates.js
@@ -0,0 +1,57 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 12.2.5
+description: >
+    In a class, duplicate computed property setter names produce only a single property of
+    that name, whose value is the value of the last property of that name.
+---*/
+var calls = 0;
+class C {
+  set ['a'](_) {
+    calls++;
+  }
+}
+new C().a = 'A';
+assert.sameValue(calls, 1, "The value of `calls` is `1`, after executing `new C().a = 'A';`");
+
+calls = 0;
+class C2 {
+  set b(_) {
+    throw new Test262Error("The first `b` setter definition in `C2` is unreachable");
+  }
+  set ['b'](_) {
+    calls++;
+  }
+}
+new C2().b = 'B';
+assert.sameValue(calls, 1, "The value of `calls` is `1`, after executing `new C2().b = 'B';`");
+
+calls = 0;
+class C3 {
+  set c(_) {
+    throw new Test262Error("The first `c` setter definition in `C3` is unreachable");
+  }
+  set ['c'](_) {
+    throw new Test262Error("The second `c` setter definition in `C3` is unreachable");
+  }
+  set ['c'](_) {
+    calls++
+  }
+}
+new C3().c = 'C';
+assert.sameValue(calls, 1, "The value of `calls` is `1`, after executing `new C3().c = 'C';`");
+
+calls = 0;
+class C4 {
+  set ['d'](_) {
+    throw new Test262Error("The first `d` setter definition in `C4` is unreachable");
+  }
+  set d(_) {
+    calls++
+  }
+}
+new C4().d = 'D';
+assert.sameValue(calls, 1, "The value of `calls` is `1`, after executing `new C4().d = 'D';`");
+
+reportCompare(0, 0);