Added StringWidget tests

IPython/html/tests/casperjs/test_cases/widgets.js

@@ -820,4 +820,66 b' casper.notebook_test(function () {'
         this.test.assert(verify_selection(this, 4), 'Item added to selection widget.');
     });
 
+    // Test string widget //////////////////////////////////////////////////////
+    var string_index = this.append_cell(
+        'string_widget = widgets.StringWidget()\n' +
+        'display(string_widget)\n'+
+        'display(string_widget, view_name="TextAreaView")\n' +
+        'display(string_widget, view_name="HTMLView")\n' +
+        'display(string_widget, view_name="LatexView")\n' +
+        'string_widget.value = "xyz"\n' +
+        'print("Success")');
+    this.execute_cell_then(string_index, function(index){
+
+        this.test.assert(this.get_output_cell(index).text == 'Success\n', 
+            'Create string widget cell executed with correct output.');
+
+        this.test.assert(this.cell_element_exists(index, 
+            '.widget-area .widget-subarea'),
+            'Widget subarea exists.');
+
+        this.test.assert(this.cell_element_exists(index, 
+            '.widget-area .widget-subarea .widget-hbox-single input[type=text]'),
+            'Textbox exists.');
+
+        this.test.assert(this.cell_element_exists(index, 
+            '.widget-area .widget-subarea .widget-hbox textarea'),
+            'Textarea exists.');
+
+        this.test.assert(this.cell_element_function(index, 
+            '.widget-area .widget-subarea .widget-hbox textarea', 'val')=='xyz',
+            'Python set textarea value.');
+
+        this.test.assert(this.cell_element_function(index, 
+            '.widget-area .widget-subarea .widget-hbox-single input[type=text]', 'val')=='xyz',
+            'Python set textbox value.');
+
+        this.cell_element_function(index, 
+            '.widget-area .widget-subarea .widget-hbox-single input[type=text]', 'val', [''])
+        this.sendKeys('.widget-area .widget-subarea .widget-hbox-single input[type=text]', 'abc');
+
+        this.test.assert(this.cell_element_function(index, 
+            '.widget-area .widget-subarea .widget-hbox textarea', 'val')=='abc',
+            'Textarea updated to textbox contents.');
+
+        this.cell_element_function(index, 
+            '.widget-area .widget-subarea .widget-hbox textarea', 'val', ['']);
+        this.sendKeys('.widget-area .widget-subarea .widget-hbox textarea', '$\\LaTeX{}$');
+
+        this.test.assert(this.cell_element_function(index, 
+            '.widget-area .widget-subarea .widget-hbox-single input[type=text]', 'val')=='$\\LaTeX{}$',
+            'Textbox updated to textarea contents.');
+    });
+
+    this.wait(500); // Wait for change to execute in kernel
+
+    index = this.append_cell('print(string_widget.value)');
+    this.execute_cell_then(index, function(index){
+        this.test.assert(this.get_output_cell(index).text == '$\\LaTeX{}$\n', 
+            'Python updated with correct string widget value.');
+
+        this.test.assert(this.cell_element_exists(string_index, 
+            '.widget-area .widget-subarea div span.MathJax_Preview'),
+            'MathJax parsed the LaTeX successfully.');
+    });
 });