Add testcase for EWMH desktop viewport

Test that the EWMH specified property _NET_DESKTOP_VIEWPORT is updated
properly on the root window. We interpret this as a list of x/y
coordinate pairs for the upper left corner of the respective outputs of
the workspaces.

This test is for this commit:

feature: implement ewmh desktop viewport property

4205973135f28a0ab0e25a63dbc8c6fff0d3539e

diff --git a/testcases/t/521-ewmh-desktop-viewport.t b/testcases/t/521-ewmh-desktop-viewport.t
new file mode 100644 (file)
index 0000000..07034cd
--- /dev/null
+++ b/testcases/t/521-ewmh-desktop-viewport.t
@@ -0,0 +1,92 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • http://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • http://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • http://build.i3wm.org/docs/ipc.html
+#   (or docs/ipc)
+#
+# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
+#   (unless you are already familiar with Perl)
+#
+# Test that the EWMH specified property _NET_DESKTOP_VIEWPORT is updated
+# properly on the root window. We interpret this as a list of x/y coordinate
+# pairs for the upper left corner of the respective outputs of the workspaces
+# Ticket: #1241
+use i3test i3_autostart => 0;
+
+my $config = <<EOT;
+# i3 config file (v4)
+font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
+
+workspace 0 output fake-0
+workspace 1 output fake-1
+
+fake-outputs 1024x768+0+0,1024x768+1024+0
+EOT
+
+my $pid = launch_with_config($config);
+
+sub get_desktop_viewport {
+    my $cookie = $x->get_property(
+        0,
+        $x->get_root_window(),
+        $x->atom(name => '_NET_DESKTOP_VIEWPORT')->id,
+        $x->atom(name => 'CARDINAL')->id,
+        0,
+        4096
+    );
+
+    my $reply = $x->get_property_reply($cookie->{sequence});
+
+    return 0 if $reply->{value_len} == 0;
+
+    my $len = $reply->{length};
+
+    return unpack ("L$len", $reply->{value});
+}
+
+# initialize the workspaces
+cmd 'workspace 1';
+cmd 'workspace 0';
+
+my @expected_viewport = (0, 0, 1024, 0);
+my @desktop_viewport = get_desktop_viewport;
+
+is_deeply(\@desktop_viewport, \@expected_viewport,
+    '_NET_DESKTOP_VIEWPORT should be an array of x/y coordinate pairs for the upper left corner of the respective outputs of the workspaces');
+
+cmd 'workspace 0';
+open_window;
+cmd 'workspace 3';
+
+@expected_viewport = (0, 0, 0, 0, 1024, 0);
+@desktop_viewport = get_desktop_viewport;
+
+is_deeply(\@desktop_viewport, \@expected_viewport,
+    'it should be updated when a new workspace appears');
+
+cmd 'rename workspace 3 to 2';
+
+@expected_viewport = (0, 0, 0, 0, 1024, 0);
+@desktop_viewport = get_desktop_viewport;
+
+is_deeply(\@desktop_viewport, \@expected_viewport,
+    'it should stay up to date when a workspace is renamed');
+
+cmd 'workspace 0';
+
+@expected_viewport = (0, 0, 1024, 0);
+@desktop_viewport = get_desktop_viewport;
+
+is_deeply(\@desktop_viewport, \@expected_viewport,
+    'it should be updated when a workspace is emptied');
+
+exit_gracefully($pid);
+
+done_testing;