Issue 102: Piping null to the server will crash it
static enum test_return test_binary_delete_impl(const char *key, uint8_t cmd) {
    union {
        protocol_binary_request_no_extras request;
        protocol_binary_response_no_extras response;
        char bytes[1024];
    } send, receive;
    size_t len = raw_command(send.bytes, sizeof(send.bytes), cmd,
                             key, strlen(key), NULL, 0);

    safe_send(send.bytes, len, false);
    safe_recv_packet(receive.bytes, sizeof(receive.bytes));
    validate_response_header(&receive.response, cmd,
                             PROTOCOL_BINARY_RESPONSE_KEY_ENOENT);
    len = storage_command(send.bytes, sizeof(send.bytes),
                          PROTOCOL_BINARY_CMD_ADD,
                          key, strlen(key), NULL, 0, 0, 0);
    safe_send(send.bytes, len, false);
    safe_recv_packet(receive.bytes, sizeof(receive.bytes));
    validate_response_header(&receive.response, PROTOCOL_BINARY_CMD_ADD,
                             PROTOCOL_BINARY_RESPONSE_SUCCESS);

    len = raw_command(send.bytes, sizeof(send.bytes),
                      cmd, key, strlen(key), NULL, 0);
    safe_send(send.bytes, len, false);

    if (cmd == PROTOCOL_BINARY_CMD_DELETE) {
        safe_recv_packet(receive.bytes, sizeof(receive.bytes));
        validate_response_header(&receive.response, PROTOCOL_BINARY_CMD_DELETE,
                                 PROTOCOL_BINARY_RESPONSE_SUCCESS);
    }

    safe_send(send.bytes, len, false);
    safe_recv_packet(receive.bytes, sizeof(receive.bytes));
    validate_response_header(&receive.response, cmd,
                             PROTOCOL_BINARY_RESPONSE_KEY_ENOENT);

    return TEST_PASS;
}

static enum test_return test_binary_delete_impl(const char *key, uint8_t cmd) {
    union {
        protocol_binary_request_no_extras request;
        protocol_binary_response_no_extras response;
        char bytes[1024];
    } send, receive;
    size_t len = raw_command(send.bytes, sizeof(send.bytes), cmd,
                             key, strlen(key), NULL, 0);

    safe_send(send.bytes, len, false);
    safe_recv_packet(receive.bytes, sizeof(receive.bytes));
    validate_response_header(&receive.response, cmd,
                             PROTOCOL_BINARY_RESPONSE_KEY_ENOENT);
    len = storage_command(send.bytes, sizeof(send.bytes),
                          PROTOCOL_BINARY_CMD_ADD,
                          key, strlen(key), NULL, 0, 0, 0);
    safe_send(send.bytes, len, false);
    safe_recv_packet(receive.bytes, sizeof(receive.bytes));
    validate_response_header(&receive.response, PROTOCOL_BINARY_CMD_ADD,
                             PROTOCOL_BINARY_RESPONSE_SUCCESS);

    len = raw_command(send.bytes, sizeof(send.bytes),
                      cmd, key, strlen(key), NULL, 0);
    safe_send(send.bytes, len, false);

    if (cmd == PROTOCOL_BINARY_CMD_DELETE) {
        safe_recv_packet(receive.bytes, sizeof(receive.bytes));
        validate_response_header(&receive.response, PROTOCOL_BINARY_CMD_DELETE,
                                 PROTOCOL_BINARY_RESPONSE_SUCCESS);
    }

    safe_send(send.bytes, len, false);
    safe_recv_packet(receive.bytes, sizeof(receive.bytes));
    validate_response_header(&receive.response, cmd,
                             PROTOCOL_BINARY_RESPONSE_KEY_ENOENT);

    return TEST_PASS;
}
