Debugging macro to compare two floating point numbers within an epsilon.
The effect of
g_assert_cmpfloat_with_epsilon (n1, n2, epsilon) is
the same as
g_assert_true (abs (n1 - n2) < epsilon). The advantage
of this macro is that it can produce a message that includes the
actual values of
Available since: 2.58
This function is not directly available to language bindings.