Debugging macro to compare two strings. If the comparison fails, an error message is logged and the application is either terminated or the testcase marked as failed. The strings are compared using g_strcmp0().
The effect of
g_assert_cmpstr (s1, op, s2) is
the same as
g_assert_true (g_strcmp0 (s1, s2) op 0).
The advantage of this macro is that it can produce a message that
includes the actual values of
g_assert_cmpstr (mystring, ==, "fubar");