a test of the arrow keys for non-empty notebook

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

@@ -0,0 +1,23 b''
+//
+// Check for errors with up and down arrow presses in a non-empty notebook.
+//
+casper.notebook_test(function () {
+    var result = this.evaluate(function() {
+        pos0 = IPython.notebook.get_selected_index();
+        IPython.notebook.insert_cell_below('code'); 
+        pos1 = IPython.notebook.get_selected_index();
+        IPython.notebook.insert_cell_below('code'); 
+        pos2 = IPython.notebook.get_selected_index();
+        // Simulate the "up arrow" and "down arrow" keys.
+        IPython.utils.press_up();
+        pos3 = IPython.notebook.get_selected_index();
+        IPython.utils.press_down();
+        pos4 = IPython.notebook.get_selected_index();
+        return  pos0 == 0 &&
+                pos1 == 1 &&
+                pos2 == 2 &&
+                pos3 == 1 &&
+                pos4 == 2;
+    });
+    this.test.assertTrue(result, 'Up/down arrow okay in non-empty notebook.');
+});