+ * "cb => sub { my ($val, $name) = @_; ...; return $passed }"
+
+ Specifies a subroutine to execute for each test instead of
+ "Test::More::is". It receives the number of bytes leaked in $_[0]
+ and the test name in $_[1], and is expected to return true if the
+ test passed and false otherwise. Defaults to
+
+ sub {
+ is($_[0], 0, $_[1]);
+ (defined $_[0] and $_[0] == 0) : 1 : 0
+ }
+