%TRUE if the file exists. It may or may not be a regular file.
%TRUE if the file is a directory.
%TRUE if the file is executable.
%TRUE if the file is a regular file (not a directory). Note that this test will also return %TRUE if the tested file is a symlink to a regular file.
%TRUE if the file is a symlink.
A test to perform on a file using g_file_test().