1 files changed, 80 insertions, 0 deletions
diff --git a/js/src/tests/non262/class/methodOverwrites.js b/js/src/tests/non262/class/methodOverwrites.js
new file mode 100644
index 0000000000..c1c460a28c
--- /dev/null
+++ b/js/src/tests/non262/class/methodOverwrites.js
@@ -0,0 +1,80 @@
+// Ensure that we can overwrite methods when more tha one is present.
+{
+    var result = 0;
+    // Regardless of order, the constructor is overridden by any CPN, because it's
+    // processed seperately.
+    class a { ["constructor"]() { result += 1; }; constructor() { result += 2; } }
+    var aInst = new a();
+    assertEq(result, 2);
+    aInst.constructor();
+    assertEq(result, 3);
+
+    class b { constructor() { result += 2; } ["constructor"]() { result += 1; }; }
+    var bInst = new b();
+    assertEq(result, 5);
+    bInst.constructor();
+    assertEq(result, 6);
+
+    class c { constructor() { } method() { result += 1 } get method() { result += 2 } }
+    new c().method;
+    assertEq(result, 8);
+
+    class d { constructor() { } get method() { result += 1 } method() { result += 2 } }
+    new d().method();
+    assertEq(result, 10);
+
+    // getters and setter should not overwrite each other, but merge cleanly.
+    class e { constructor() { } get method() { result += 1 } set method(x) { } }
+    new e().method;
+    assertEq(result, 11);
+
+    class f { constructor() { }
+            set method(x) { throw "NO"; }
+            method() { throw "NO" }
+            get method() { return new Function("result += 1"); }
+            }
+    new f().method();
+    assertEq(result, 12);
+}
+
+// Try again with expressions.
+{
+    var result = 0;
+    // Regardless of order, the constructor is overridden by any CPN, because it's
+    // processed seperately.
+    let a = class { ["constructor"]() { result += 1; }; constructor() { result += 2; } };
+    var aInst = new a();
+    assertEq(result, 2);
+    aInst.constructor();
+    assertEq(result, 3);
+
+    let b = class { constructor() { result += 2; } ["constructor"]() { result += 1; }; };
+    var bInst = new b();
+    assertEq(result, 5);
+    bInst.constructor();
+    assertEq(result, 6);
+
+    let c = class { constructor() { } method() { result += 1 } get method() { result += 2 } };
+    new c().method;
+    assertEq(result, 8);
+
+    let d = class { constructor() { } get method() { result += 1 } method() { result += 2 } };
+    new d().method();
+    assertEq(result, 10);
+
+    // getters and setter should not overwrite each other, but merge cleanly.
+    let e = class { constructor() { } get method() { result += 1 } set method(x) { } };
+    new e().method;
+    assertEq(result, 11);
+
+    let f = class { constructor() { }
+                    set method(x) { throw "NO"; }
+                    method() { throw "NO" }
+                    get method() { return new Function("result += 1"); }
+                  };
+    new f().method();
+    assertEq(result, 12);
+}
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0, "OK");