upstream/ipython Files · IPython/html/tests/notebook/merge_cells_api.js

Handle kernel messages synchronously...

Handle kernel messages synchronously A problem can happen when two messages come in for different comms, where the second depends on the first (for example, the first might be a message setting the state of a widget, and the second triggering a view creation for the widget). Since comm message queues are independent of each other, the second message could be executed before the first message. This exposes a more fundamental assumption users are likely to have that messages from python are processed synchronously. Thanks to @dmadeka for reporting an error that led to discovering this issue.

Jonathan Frederic - - Load All Authors

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             merge_cells_api.js
        
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             / IPython / html / tests / notebook / merge_cells_api.js
          
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      //

      // Test merging two notebook cells.

      //

      casper.notebook_test(function() {

          var that = this;

          var set_cells_text =  function () {

              that.evaluate(function() {

                  var cell_one = IPython.notebook.get_selected_cell();

                  cell_one.set_text('a = 5');

              });

              that.trigger_keydown('b');

              that.evaluate(function() {

                  var cell_two = IPython.notebook.get_selected_cell();

                  cell_two.set_text('print(a)');

              });

          };

          this.evaluate(function () {

              IPython.notebook.command_mode();

          });

          // merge_cell_above()

          set_cells_text();

          var output_above = this.evaluate(function () {

              IPython.notebook.merge_cell_above();

              return IPython.notebook.get_selected_cell().get_text();

          });

          // merge_cell_below()

          set_cells_text();

          var output_below = this.evaluate(function() {

              IPython.notebook.select(0);

              IPython.notebook.merge_cell_below();

              return IPython.notebook.get_selected_cell().get_text();

          });

          this.test.assertEquals(output_above, 'a = 5\nprint(a)',

                                 'Successful merge_cell_above().');

          this.test.assertEquals(output_below, 'a = 5\nprint(a)',

                                 'Successful merge_cell_below().');

      });

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				//
				// Test merging two notebook cells.
				//
				casper.notebook_test(function() {
				var that = this;
				var set_cells_text = function () {
				that.evaluate(function() {
				var cell_one = IPython.notebook.get_selected_cell();
				cell_one.set_text('a = 5');
				});

				that.trigger_keydown('b');

				that.evaluate(function() {
				var cell_two = IPython.notebook.get_selected_cell();
				cell_two.set_text('print(a)');
				});
				};

				this.evaluate(function () {
				IPython.notebook.command_mode();
				});

				// merge_cell_above()
				set_cells_text();
				var output_above = this.evaluate(function () {
				IPython.notebook.merge_cell_above();
				return IPython.notebook.get_selected_cell().get_text();
				});

				// merge_cell_below()
				set_cells_text();
				var output_below = this.evaluate(function() {
				IPython.notebook.select(0);
				IPython.notebook.merge_cell_below();
				return IPython.notebook.get_selected_cell().get_text();
				});

				this.test.assertEquals(output_above, 'a = 5\nprint(a)',
				'Successful merge_cell_above().');
				this.test.assertEquals(output_below, 'a = 5\nprint(a)',
				'Successful merge_cell_below().');
				});