1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Date/constructor-one-Date-argument.js b/js/src/tests/ecma_6/Date/constructor-one-Date-argument.js
new file mode 100644
index 000000000..718c41373
--- /dev/null
+++ b/js/src/tests/ecma_6/Date/constructor-one-Date-argument.js
@@ -0,0 +1,40 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommonn.org/licenses/publicdomain/
+ */
+
+var BUGNUMBER = 1187233;
+var summary =
+  "Passing a Date object to |new Date()| should copy it, not convert it to " +
+  "a primitive and create it from that.";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+Date.prototype.toString = Date.prototype.valueOf = null;
+var d = new Date(new Date(8675309));
+assertEq(d.getTime(), 8675309);
+
+Date.prototype.valueOf = () => 42;
+d = new Date(new Date(8675309));
+assertEq(d.getTime(), 8675309);
+
+var D = newGlobal().Date;
+
+D.prototype.toString = D.prototype.valueOf = null;
+var d = new Date(new D(3141592654));
+assertEq(d.getTime(), 3141592654);
+
+D.prototype.valueOf = () => 525600;
+d = new Date(new D(3141592654));
+assertEq(d.getTime(), 3141592654);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");