/usr/share/installed-tests/glib/bit-test.test is in libglib2.0-tests 2.48.0-1ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [Test]
Type=session
Exec=/usr/lib/glib2.0/installed-tests/glib/bit-test
|