diff --git a/test/specs/jsdoc/util/doop.js b/test/specs/jsdoc/util/doop.js
index c0f53292..217303de 100644
--- a/test/specs/jsdoc/util/doop.js
+++ b/test/specs/jsdoc/util/doop.js
@@ -1,4 +1,73 @@
 /*global describe: true, it: true */
-describe("jsdoc/util/doop", function() {
-	// TODO
-});
\ No newline at end of file
+describe('jsdoc/util/doop', function() {
+    var doop = require('jsdoc/util/doop');
+
+    it('should exist', function() {
+        expect(doop).toBeDefined();
+        expect(typeof doop).toBe('object');
+    });
+
+    it('should export a doop function', function() {
+        expect(doop.doop).toBeDefined();
+        expect(typeof doop.doop).toBe('function');
+    });
+
+    // deep-clones a simple object.
+    describe('doop', function() {
+        it("should return the input object if it's simple (boolan, string etc) or a function", function() {
+            // .toBe uses === to test.
+
+            // test a number...
+            expect(doop.doop(3)).toBe(3);
+            // test a string...
+            expect(doop.doop('asdf')).toBe('asdf');
+            // test a boolean...
+            expect(doop.doop(true)).toBe(true);
+            // test a function...
+            var f = function () {};
+            expect(doop.doop(f)).toBe(f);
+        });
+
+        it("should return a clone of an array", function() {
+            var inp = [1,2,3],
+                out = doop.doop(inp);
+            // toEqual is a comparison on properties; toBe is === comparison.
+            expect(inp).toEqual(out);
+            expect(inp).not.toBe(out);
+        });
+
+        it("should return a clone of an object", function() {
+            var inp = {a:1, b:2, 'asdf-fdsa': 3};
+                out = doop.doop(inp);
+            // toEqual is a comparison on properties; toBe is === comparison.
+            expect(inp).toEqual(out);
+            expect(inp).not.toBe(out);
+        });
+
+        // checks that a === b if it's not an object or array (or it's af function);
+        // otherwise recurses down into keys and compares them.
+        function compareForEquality(a, b) {
+            if (a instanceof Object && a.constructor != Function) {
+                // if it's an object and not a function, it should clone.
+                var keys = Object.keys(a);
+                expect(Object.keys(a)).toEqual(Object.keys(b));
+                for (var i = 0; i < keys.length; ++i) {
+                    compareForEquality(a[keys[i]], b[keys[i]]);
+                }
+            } else {
+                // otherwise, it should be exactly equal.
+                expect(a).toBe(b);
+            }
+        }
+
+        it("should clone recursively", function() {
+            var inp = {a:1, b:2, 'asdf-fdsa': {a: 'fdsa', b: [1,2,3]}};
+                out = doop.doop(inp);
+            // toEqual is a comparison on properties; toBe is === comparison.
+            expect(inp).toEqual(out);
+            expect(inp).not.toBe(out);
+            // double-check
+            compareForEquality(inp, out);
+        });
+    });
+});