Virtaal installs a mime package for various .po-like file formats, one
of which has the extension .txt. This causes GLib to report ".txt"
files still as "text/plain" but no longer with complete certainty.
The result is that asserting !uncertain during the testsuite causes the
test to fail if Virtaal happens to be installed.
Remove this assertion.
Very many testcases, some GLib tools (resource compiler, etc) and
GApplication were calling g_type_init().
Remove those uses, as they are no longer required.
https://bugzilla.gnome.org/show_bug.cgi?id=686161
After fixing bug 674452 this test case now reliably fails, as "ABC abc" is text
and definitively not PowerPoint. It previously worked as g_content_type_guess()
was reading beyond the boundary of the data due to specifying -1 as data
length.
Update that test case to expect a PO template instead, and add two more with a
definitive PO template syntax and some binary data. We do not currently have a
MIME magic for PowerPoint, so we cannot actually detect it with certainty, but
at least make sure that the returned MIME type is correct.
https://bugzilla.gnome.org/show_bug.cgi?id=678941
g_content_type_guess() requires specifying a valid data length. Fixes a
segfault when running the test.
Also add an explicit check for this and return XDG_MIME_TYPE_UNKNOWN when
data_size is specified as -1, to avoid crashing.
https://bugzilla.gnome.org/show_bug.cgi?id=674452
