Fix tests

IPython/html/tests/widgets/widget.js

@@ -149,7 +149,7 casper.notebook_test(function () {
         'import time\n' +
         'textbox = widgets.Text()\n' +
         'display(textbox)\n' +
-        'textbox.add_class("my-throttle-textbox", selector="input")\n' +
+        'textbox._dom_classes = ["my-throttle-textbox"]\n' +
         'def handle_change(name, old, new):\n' +
         '    display(len(new))\n' +
         '    time.sleep(0.5)\n' +
@@ -166,7 +166,7 casper.notebook_test(function () {
             '.my-throttle-textbox'), 'Textbox exists.');
 
         // Send 20 characters
-        this.sendKeys('.my-throttle-textbox', '....................');
+        this.sendKeys('.my-throttle-textbox input', '....................');
     });
 
     this.wait_for_widget(textbox);

IPython/html/tests/widgets/widget_box.js

@@ -11,7 +11,7 casper.notebook_test(function () {
         'button = widgets.Button()\n'+
         'container.children = [button]\n'+
         'display(container)\n'+
-        'container.add_class("my-test-class")\n'+
+        'container._dom_classes = ["my-test-class"]\n'+
         'print("Success")\n');
     this.execute_cell_then(container_index, function(index){
 
@@ -28,7 +28,7 casper.notebook_test(function () {
 
         this.test.assert(this.cell_element_exists(index, 
             '.widget-area .widget-subarea .my-test-class'),
-            'add_class works.');
+            '_dom_classes works.');
 
         this.test.assert(this.cell_element_exists(index, 
             '.widget-area .widget-subarea .my-test-class button'),
@@ -49,7 +49,7 casper.notebook_test(function () {
     });
 
     index = this.append_cell(
-        'container.remove_class("my-test-class")\n'+
+        'container._dom_classes = []\n'+
         'print("Success")\n');
     this.execute_cell_then(index, function(index){
 
@@ -58,7 +58,7 casper.notebook_test(function () {
 
         this.test.assert(! this.cell_element_exists(container_index, 
             '.widget-area .widget-subarea .my-test-class'),
-            'remove_class works.');
+            '_dom_classes can be used to remove a class.');
     });
 
     index = this.append_cell(

IPython/html/tests/widgets/widget_float.js

@@ -7,11 +7,11 casper.notebook_test(function () {
     this.execute_cell_then(index);
 
     var float_text = {};
-    float_text.query = '.widget-area .widget-subarea .widget-hbox-single .my-second-float-text';
+    float_text.query = '.widget-area .widget-subarea .widget-hbox-single .my-second-float-text input';
     float_text.index = this.append_cell(
         'float_widget = widgets.FloatText()\n' +
         'display(float_widget)\n' + 
-        'float_widget.add_class("my-second-float-text", selector="input")\n' + 
+        'float_widget._dom_classes = ["my-second-float-text"]\n' + 
         'print(float_widget.model_id)\n');
     this.execute_cell_then(float_text.index, function(index){
         float_text.model_id = this.get_output_cell(index).text.trim();

IPython/html/tests/widgets/widget_image.js

@@ -27,7 +27,6 casper.notebook_test(function () {
         // window.  If we don't do this, the captured image will be black.
         'image.set_css({"background": "blue", "z-index": "9999", "position": "fixed", "top": "0px", "left": "0px"})\n' + 
         'display(image)\n' + 
-        'image.add_class("my-test-image")\n' + 
         'print("Success")\n');
     this.execute_cell_then(image_index, function(index){
 

IPython/html/tests/widgets/widget_int.js

@@ -7,11 +7,11 casper.notebook_test(function () {
     this.execute_cell_then(index);
 
     var int_text = {};
-    int_text.query = '.widget-area .widget-subarea .widget-hbox-single .my-second-int-text';
+    int_text.query = '.widget-area .widget-subarea .widget-hbox-single .my-second-int-text input';
     int_text.index = this.append_cell(
         'int_widget = widgets.IntText()\n' +
         'display(int_widget)\n' + 
-        'int_widget.add_class("my-second-int-text", selector="input")\n' + 
+        'int_widget._dom_classes = ["my-second-int-text"]\n' + 
         'print(int_widget.model_id)\n');
     this.execute_cell_then(int_text.index, function(index){
         int_text.model_id = this.get_output_cell(index).text.trim();
@@ -64,12 +64,12 casper.notebook_test(function () {
 
     var slider_query = '.widget-area .widget-subarea .widget-hbox-single .slider';
     var int_text2 = {};
-    int_text2.query = '.widget-area .widget-subarea .widget-hbox-single .my-second-num-test-text';
+    int_text2.query = '.widget-area .widget-subarea .widget-hbox-single .my-second-num-test-text input';
     int_text2.index = this.append_cell(
         'intrange = [widgets.BoundedIntTextWidget(),\n' +
         '    widgets.IntSliderWidget()]\n' +
         '[display(intrange[i]) for i in range(2)]\n' +
-        'intrange[0].add_class("my-second-num-test-text", selector="input")\n' +  
+        'intrange[0]._dom_classes = ["my-second-num-test-text"]\n' +  
         'print(intrange[0].model_id)\n');
     this.execute_cell_then(int_text2.index, function(index){
         int_text2.model_id = this.get_output_cell(index).text.trim();