Add CasperJS utility functions, and tests for code and

Markdown cell execution.

Code cell test is based on https://gist.github.com/ellisonbg/3329929.

IPython/frontend/html/notebook/tests/casperjs/test_cases/execute_code_cell.js

@@ -0,0 +1,29 @@
+//
+// Test code cell execution.
+//
+casper.openNewNotebook();
+
+casper.then(function () {
+    this.evaluate(function () {
+        var cell = IPython.notebook.get_selected_cell();
+        cell.set_text('a=10; print a');
+        cell.execute();
+    });
+});
+
+casper.wait(2000);
+
+casper.then(function () {
+    var result = this.evaluate(function () {
+        var cell = IPython.notebook.get_cell(0);
+        var output = cell.element.find('.output_area').find('pre').html();
+        return output;
+    })
+    this.test.assertEquals(result, '10\n', 'stdout output matches')
+});
+
+casper.deleteCurrentNotebook();
+
+casper.run(function() {
+    this.test.done();
+});

IPython/frontend/html/notebook/tests/casperjs/test_cases/render_markdown.js

@@ -0,0 +1,30 @@
+//
+// Test that a Markdown cell is rendered to HTML.
+//
+casper.openNewNotebook();
+
+casper.then(function () {
+    var output = this.evaluate(function() {
+        // Does it make more sense to test the UI or the JS API here?
+        //
+        // $('#cell_type').val('markdown');
+        // $('#cell_type').change();
+        // $('#run_b').click();
+        //
+        // $('#to_markdown').click(); // fails via jQuery UI menubar
+        // $('#run_cell').click(); // fails via jQuery UI menubar
+        IPython.notebook.to_markdown();
+        var cell = IPython.notebook.get_selected_cell();
+        cell.set_text('# Foo');
+        cell.render();
+        return cell.get_rendered();
+    });
+    casper.test.assertEquals(output, '<h1>Foo</h1>', 'Markdown converted to HTML.');
+});
+
+casper.deleteCurrentNotebook();
+
+// Run the browser automation.
+casper.run(function() {
+    this.test.done();
+});

IPython/frontend/html/notebook/tests/casperjs/util.js

@@ -0,0 +1,45 @@
+//
+// Utility functions for the HTML notebook's CasperJS tests.
+//
+
+// Get the URL of a notebook server on which to run tests.
+casper.getNotebookServer = function () {
+    return 'http://127.0.0.1:8888';
+};
+
+// Create and open a new notebook.
+casper.openNewNotebook = function () {
+    var baseUrl = this.getNotebookServer();
+    this.start(baseUrl + '/new');
+};
+
+// Shut down the current notebook's kernel.
+casper._shutdownCurrentKernel = function () {
+    this.thenEvaluate(function() {
+        var baseUrl = $('body').data('baseProjectUrl');
+        var kernelId = IPython.notebook.kernel.kernel_id;
+        var url = baseUrl  + 'kernels/' + kernelId;
+        $.ajax(url, {
+            type: 'DELETE',
+        });
+    });
+};
+
+// Delete created notebook.
+casper.deleteCurrentNotebook = function () {
+    this._shutdownCurrentKernel();
+    this.thenEvaluate(function() {
+        var nbData = $('body').data();
+        var url = nbData.baseProjectUrl + 'notebooks/' + nbData.notebookId;
+        $.ajax(url, {
+            type: 'DELETE',
+        });
+    });
+};
+
+// Pass `console.log` calls from page JS to casper.
+casper.printLog = function () {
+    this.on('remote.message', function(msg) {
+        this.echo('Remote message caught: ' + msg);
+    });
+};