diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Source-surfaces.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Source-surfaces.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+// Debugger.Source.prototype
+
+load(libdir + 'asserts.js');
+
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.text.call(42)
+}, TypeError);
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.text.call({})
+}, TypeError);
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.text.call(Debugger.Source.prototype)
+}, TypeError);
+
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.element.call(42)
+}, TypeError);
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.element.call({})
+}, TypeError);
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.element.call(Debugger.Source.prototype)
+}, TypeError);
+
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.elementAttributeName.call(42)
+}, TypeError);
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.elementAttributeName.call({})
+}, TypeError);
+assertThrowsInstanceOf(function () {
+    Debugger.Source.prototype.elementAttributeName.call(Debugger.Source.prototype)
+}, TypeError);