GtkArrow and the align properties use different methods (float vs int)
to center the arrow. If the size of the arrow is odd, this will cause a
rendering that differs by half a pixel. So we request an even size for
both the arrow and the container and everything works out.
If we have a toplevel, and not a popup window, do wait an additional
0.5s to give the WM/server enough time to actually create the window.
This is a hack and there should be a better solution. But it works.
Please use POPUP windows for tests unless the test must use toplevel
windows.
Checks that the size requests for labels are as they should be for
required and natural size given various combinations of wrap, ellipsize,
width-chars and max-width-chars.
See
http://mail.gnome.org/archives/gtk-devel-list/2011-April/msg00036.html
for the discussion spawning this test.
Add a new test runner supposed to do a lot of generic tests. Run it like
this:
./gtk-reftest [OPTIONS] TESTFILE [TESTFILES...]
where FILE is a GtkBuilder ui file to run.
For a general test named "test", you want to have the following files:
1) test.ui
2) test.ref.ui
3) test.css (optional)
The test will then check that test.ui and test.ref.ui are rendered
identically with the provided css.
In detail, for every provided TESTFILE the test runner will:
1) Add the css to the default screen
2) Load the test.ui file and the test.ref.ui file
3) Grab the first GtkWindow subclass widget
4) gtk_widget_show() it and take a snapshot image of its contents into
a cairo surface.
5) Compare the two images to be bitwise identical. If they are not, a
diff image will be created hilighting the differences.
6) Save the images as png files to the output directory named:
- test.out.png (rendering of test.ui)
- test.ref.png (rendering of test.ref.ui)
- test.diff.png (optional, differences from step 5)
7) Fail the test if the two images are not bitwise identical
Credit for the idea of reftests goes to Mozilla and in particular David
Baron. For a larger introduction of why reftests are useful, see
http://weblogs.mozillazine.org/roc/archives/2008/12/reftests.html
