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We first set up product data for our test B. The values inside don t matter for the purposes of our unit test, but they aid in debugging if our test fails for an unknown reason. We then create a stub of our IProductRepository by calling a Rhino Mocks API. Rhino Mocks is a popular test-double creation and configuration framework you can find this library, created by Oren Eini (a.k.a. Ayende Rahien), at www.ayende.com/ projects/rhino-mocks.aspx. After we create a test double of our IProductRepository, we stub out the call to FindAll to return the array of Products we created earlier C. With the stubbed IProductRepository, we create a ProductsController D. With all of the classes and test doubles set up for our unit test, we can execute our controller action and capture the resulting ViewResult object E. We assert that the ViewName should be an empty string (signifying we use the Index view) and that the model passed to the view is our original array of products F. Our test passes with the implementation of our action from listing 26.9. A two-line action method is tested easily, but it isn t very interesting. In a more interesting scenario, we d edit a model and then post it to a form. Such a test would do a series of things:

Text marks can be accessed in two ways. You can retrieve a text mark at a specific GtkTextIter location. It is also possible to set up a text mark with a string as its name, which makes marks easy to keep track of. Two default text marks are always provided by GTK+ for every GtkTextBuffer: insert and selection_bound. The insert text mark refers to the current cursor position within the buffer. The selection_bound text mark refers to the boundary of selected text if there is any selected text. If no text is selected, these two marks will point to the same position. The insert and selection_bound text marks are extremely useful when manipulating buffers. They can be manipulated to automatically select or deselect text within a buffer and help you figure out where text should logically be inserted within a buffer.

1 2 3

GTK+ provides a wide array of functions for retrieving text iterators as well as manipulating text buffers. In this section, you will see a few of the most important of these methods in use in Listing 7-4 and then be introduced to many more. Figure 7-4 displays an application that will insert and retrieve the text with a GtkTextBuffer.

1999 Distributed firewalls Special issue on security, ;login:, November wwwusenixorg/publications/login/1999-11/features/firewallshtml Berners-Lee, Tim, and Dan Connolly 1995 Hypertext Markup Language 20 RFC 1866 (historic; obsoleted by RFC 2854), November wwwietforg/rfc/rfc1866txt Berners-Lee, Tim, Roy Fielding, and Larry Masinter 2005 Uniform resource identifier (URI): Generic syntax RFC 3986 (standard), January wwwietforg/rfc/rfc3986txt Berners-Lee, Tim, Roy T Fielding, and Henrik Frystyk Nielsen 1996 Hypertext Transfer Protocol HTTP/10 RFC 1945, May wwww3org/Protocols/rfc1945/rfc1945 Bishop, Matt 1995 A standard audit trail format In Proceedings of the 18th National Information Systems Security Conference, 136 145 Bishop, Matt, Christopher Wee, and Jeremy Frank 1996 Goal-oriented auditing and logging Submitted to IEEE Transactions on Computing Systems Blaze, Matt Oblivious key escrow 2002 In Information Hiding: First International Workshop, Cambridge, UK, May 30 June 1, 1996, Proceedings (LNCS 1174), 335 343 Berlin: SpringerVerlag Boneh, Dan 1999.

Check the model state for errors. If errors exist, show the original view. If not, save the model and redirect back to the index.

Figure 7-4. Screenshot of an application using a GtkTextView widget Listing 7-4 is a simple example that performs two functions. When the Insert Text button shown in Figure 7-4 is clicked, the string shown in the GtkEntry widget is inserted at the current cursor position. When the Get Text button is clicked, any selected text is output with g_print(). Listing 7-4. Using Text Iterators (iterators.c) #include <gtk/gtk.h> typedef struct { GtkWidget *entry, *textview; } Widgets; static void insert_text (GtkButton*, Widgets*); static void retrieve_text (GtkButton*, Widgets*); int main (int argc, char *argv[]) { GtkWidget *window, *scrolled_win, *hbox, *vbox, *insert, *retrieve; Widgets *w = g_slice_new (Widgets); gtk_init (&argc, &argv); window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_title (GTK_WINDOW (window), "Text Iterators"); gtk_container_set_border_width (GTK_CONTAINER (window), 10); gtk_widget_set_size_request (window, -1, 200); w->textview = gtk_text_view_new (); w->entry = gtk_entry_new (); insert = gtk_button_new_with_label ("Insert Text"); retrieve = gtk_button_new_with_label ("Get Text");

Let s start with the error path, where a user enters incorrect information. We ll assume that errors are generated as a result of validation. For the purposes of our test, shown in listing 26.12, the means of validation isn t important, but rather, how the controller behaves under this condition.

If you need to further customize every cell before it is rendered to the screen, you can use cell data functions. They allow you to tinker with every property of each individual cell. For example, you can set the foreground color based on the content of the cell or restrict the number of decimal places a floating point number that are shown. It can also be used to set properties that are calculated during runtime. Figure 8-9 shows an application that uses cell data functions to set the background color of each cell based on the text property of the GtkCellRendererText.