Add jsinput_spec back in.

common/static/js/capa/spec/jsinput_spec.js

+xdescribe("A jsinput has:", function () {
+
+    beforeEach(function () {
+        $('#fixture').remove();
+        $.ajax({
+            async: false,
+            url: 'mainfixture.html',
+            success: function(data) {
+                $('body').append($(data));
+            }
+        });
+    });
+
+
+
+    describe("The jsinput constructor", function(){
+
+        var iframe1 = $(document).find('iframe')[0];
+
+        var testJsElem = jsinputConstructor({
+            id: 1,
+            elem: iframe1,
+            passive: false
+        });
+
+        it("Returns an object", function(){
+            expect(typeof(testJsElem)).toEqual('object');
+        });
+
+        it("Adds the object to the jsinput array", function() {
+            expect(jsinput.exists(1)).toBe(true);
+        });
+
+        describe("The returned object", function() {
+
+            it("Has a public 'update' method", function(){
+                expect(testJsElem.update).toBeDefined();  
+            });
+
+            it("Returns an 'update' that is idempotent", function(){
+                var orig = testJsElem.update();
+                for (var i = 0; i++; i < 5) {
+                    expect(testJsElem.update()).toEqual(orig);
+                }
+            });
+
+            it("Changes the parent's inputfield", function() {
+                testJsElem.update();
+              
+            });
+        });
+    });
+
+
+    describe("The walkDOM functions", function() {
+
+        walkDOM();
+
+        it("Creates (at least) one object per iframe", function() {
+            jsinput.arr.length >= 2; 
+        });
+
+        it("Does not create multiple objects with the same id", function() {
+            while (jsinput.arr.length > 0) {
+                var elem = jsinput.arr.pop();
+                expect(jsinput.exists(elem.id)).toBe(false);
+            }
+        });
+    });
+})