8db9a83b39
Running test_ext2 in GitLab Continuous Integration environment fails like
this:
(test_ext2:6338): Gtk-WARNING **: 09:06:17.576: cannot open display:
Running main() from test_ext2.cc
Obviously the GitLab CI environment doesn't have an X11 display, but
unfortunately this test case code requires one.
Utils::execute_command() calls Gtk::Main::run() so requires a Gtk::Main
object constructing and therefore an X11 display, even though this
program never displays anything graphical. The call chain is:
main() test_ext2.cc
Gtk::Main::Main() gtkmm/gtk/src/main.ccg
Gtk::Main::init() [1]
gtk_init() gtk/gtk/gtkmain.c [2]
which exits with a non-zero exit status when the DISPLAY environment
variable is unset.
Looked at deriving from Gtk::Main class and writing a replacement init()
method which calls gtk_init_check() instead of gtk_init() but
Gtk::Main::instance_ is a private member so not accessible in a derived
class.
Tried using Glib::MainLoop instead of Gtk::Main, but that doesn't
initialise everything that Gtk::Main(), so the program crashes.
Therefore use xvfb-run [3][4] to run this test program against a virtual
X11 display when a real display isn't available. Coded execution of
xvfb-run into this test program so that it can simply be executed on the
command line like the other test programs, without having to remember to
run "xvfb-run ./test_ext2 ...".
[1] Gtk::Main::init()
https://gitlab.gnome.org/GNOME/gtkmm/blob/3.10.1/gtk/src/main.ccg#L287
[2] gtk_init()
https://gitlab.gnome.org/GNOME/gtk/blob/3.10.9/gtk/gtkmain.c#L1000
[3] how to run gtk app on linux without an x server
https://superuser.com/questions/624918/how-to-run-gtk-app-on-linux-without-an-x-server
[4] Using GTK without DISPLAY
https://stackoverflow.com/questions/11694278/using-gtk-without-display
Closes !49 - Add file system interface tests
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|---|---|---|
| .. | ||
| Makefile.am | ||
| test_BlockSpecial.cc | ||
| test_PasswordRAMStore.cc | ||
| test_PipeCapture.cc | ||
| test_dummy.cc | ||
| test_ext2.cc | ||