#ifndef MESSAGE_H

#define MESSAGE_H

#define TRUE 1

#define FALSE 0

typedef struct {

    int sender;

    int isSend;

    int isCharge;

    char date[];

}Message;

Message * makeMessage(const int sender, const char *date);

void setSendFlag(Message * const message);

void setChargeFlag(Message * const message);

int isSameDate(const Message * const message, const char * const date);

char * format(const Message * const message);

const char * boolStr(const int value);

#endif

#include <assert.h>

#include <string.h>

#include <stdlib.h>

#include <stdio.h>

#include "message.h"

Message * makeMessage(const int sender, const char *date)

{

    Message *message = (Message*)malloc(sizeof(Message));

    assert(message != NULL);

    message->sender   = sender;

    message->isSend   = FALSE;

    message->isCharge = FALSE;

    strncpy(message->date, date, );

    return message;

}

const char * boolStr(const int value)

{

    return value == TRUE ? "TRUE" : "FALSE";

}

char * format(const Message * const message)

{

    #define BUF_SIZE 1024

    static char buffer[BUF_SIZE];

    memset(&buffer, , BUF_SIZE);

    snprintf((char*)&buffer, BUF_SIZE, "Message <%d %s %s>\n", \

        message->sender, boolStr(message->isSend), boolStr(message->isCharge));

    return (char*)buffer;

}

void setSendFlag(Message * const message)

{

    message->isSend = TRUE;

}

void setChargeFlag(Message * const message)

{

    message->isCharge = TRUE;

}

int isSameDate(const Message * const message, const char * const date)

{

    if (strncmp(message->date, date, ) == )

    {

        return TRUE;

    }

    else

    {

        return FALSE;

    }

}

#include <stdio.h>

#include "message.h"

#include "gtest/gtest.h"

TEST(MESSAGE,makeMessage){

    Message *message = makeMessage(,"");

    EXPECT_EQ(, message->sender);

    EXPECT_STREQ("Message <1 FALSE FALSE>\n", format(message));

}

g++ -c message.c

g++ -c testMessage.c

g++ message.o testMessage.o -lgtest -lpthread

./a.out

Running main() from gtest_main.cc

[==========] Running  test from  test case.

[----------] Global test environment set-up.

[----------]  test from MESSAGE

[ RUN      ] MESSAGE.makeMessage

[       OK ] MESSAGE.makeMessage ( ms)

[----------]  test from MESSAGE ( ms total)

[----------] Global test environment tear-down

[==========]  test from  test case ran. ( ms total)

[  PASSED  ]  test.