TESTCASE( strrchr( abcde, '\0' ) == &abcde[5] );
TESTCASE( strrchr( abcde, 'e' ) == &abcde[4] );
TESTCASE( strrchr( abcde, 'a' ) == &abcde[0] );
TESTCASE( strrchr( abcde, '\0' ) == &abcde[5] );
TESTCASE( strrchr( abcde, 'e' ) == &abcde[4] );
TESTCASE( strrchr( abcde, 'a' ) == &abcde[0] );