1 files changed, 78 insertions, 0 deletions
diff --git a/js/src/tests/non262/RegExp/constructor-constructor.js b/js/src/tests/non262/RegExp/constructor-constructor.js
new file mode 100644
index 0000000000..528f4978c2
--- /dev/null
+++ b/js/src/tests/non262/RegExp/constructor-constructor.js
@@ -0,0 +1,78 @@
+var BUGNUMBER = 1147817;
+var summary = "RegExp constructor should check pattern.constructor.";
+
+print(BUGNUMBER + ": " + summary);
+
+var g = newGlobal();
+
+var re = /foo/;
+assertEq(RegExp(re), re);
+re.constructor = 10;
+assertEq(RegExp(re) === re, false);
+assertEq(RegExp(re).toString(), re.toString());
+
+// If pattern comes from different global, RegExp shouldn't return it.
+re = g.eval(`var re = /foo/; re;`);
+assertEq(RegExp(re) === re, false);
+assertEq(RegExp(re).toString(), re.toString());
+g.eval(`re.constructor = 10;`);
+assertEq(RegExp(re) === re, false);
+assertEq(RegExp(re).toString(), re.toString());
+
+
+re = new Proxy(/a/, {
+  get(that, name) {
+    return that[name];
+  }
+});
+assertEq(RegExp(re), re);
+re = new Proxy(/a/, {
+  get(that, name) {
+    if (name == "constructor") {
+      return function() {};
+    }
+    return that[name];
+  }
+});
+assertEq(RegExp(re) === re, false);
+re = new Proxy(/a/, {
+  get(that, name) {
+    if (name == Symbol.match) {
+      return undefined;
+    }
+    return that[name];
+  }
+});
+assertEq(RegExp(re) === re, false);
+
+re = new Proxy(g.eval(`/a/`), {
+  get(that, name) {
+    return that[name];
+  }
+});
+assertEq(RegExp(re) === re, false);
+
+re = g.eval(`new Proxy(/a/, {
+  get(that, name) {
+    return that[name];
+  }
+});`);
+assertEq(RegExp(re) === re, false);
+
+
+var obj = { [Symbol.match]: true, source: "foo", flags: "gi" };
+assertEq(RegExp(obj) === obj, false);
+assertEq(RegExp(obj).toString(), "/foo/gi");
+obj.constructor = RegExp;
+assertEq(RegExp(obj), obj);
+
+obj = g.eval(`var obj = { [Symbol.match]: true, source: "foo", flags: "gi" }; obj;`);
+assertEq(RegExp(obj) === obj, false);
+assertEq(RegExp(obj).toString(), "/foo/gi");
+g.eval(`obj.constructor = RegExp`);
+assertEq(RegExp(obj) === obj, false);
+obj.constructor = RegExp;
+assertEq(RegExp(obj), obj);
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);