test_read
test_read(fd, "TEST", B_STRING_TYPE, "Hello BeOS", 11);
test_read(fd, "TEST", B_STRING_TYPE, "Hello Haiku", 12);
test_read(fd, "TESTraw", B_RAW_TYPE, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0Haiku",
test_read(fd, "TESTraw", B_RAW_TYPE, "Haiku", 6);
test_read(fd, "TESTswitch", B_RAW_TYPE, buffer, strlen(buffer) + 1);
test_read(fd, "TESTswitch", B_RAW_TYPE, buffer, 4006);