memory_tests.c

#include "memory_management.h"
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

int main()
{

	// Test 1: Allocate and free memory
	int *ptr1 = (int *)_malloc(sizeof(int));
	assert(ptr1 != NULL);
	*ptr1 = 42;
	printf("Before: ");
	printFreeList();
	_free(ptr1);
	printf("After: ");
	printFreeList();
	printf("Test 1 passed: Memory allocated and used successfully\n\n");

	// Test 2: Allocate an array and free it
	int *arr = (int *)_malloc(5 * sizeof(int));
	assert(arr != NULL);
	for (int i = 0; i < 5; ++i)
	{
		arr[i] = i * 2;
	}
	*ptr1 = 42;
	printf("Before: ");
	printFreeList();
	_free(arr);
	printf("After: ");
	printFreeList();
	printf("Test 2 passed: Array allocated and freed successfully\n\n");

	// Test 3: Allocate and free memory in a loop
	for (int i = 0; i < 1000; ++i)
	{
		char *ptr2 = (char *)_malloc(sizeof(char));
		assert(ptr2 != NULL);
		*ptr2 = 'y';
		_free(ptr2);
	}
	printFreeList();
	printf("Test 3 passed: Allocate and free in a loop successfully\n\n");

	// Test 4: Allocate and free an array in a loop
	int **ptr = (int **)_malloc(1000 * sizeof(int *));
	assert(ptr != NULL);
	for (int i = 0; i < 1000; ++i)
	{
		ptr[i] = (int *)_malloc(sizeof(int));
		assert(ptr[i] != NULL);
		*ptr[i] = i;
	}
	printf("Before: ");
	printFreeList();
	for (int i = 0; i < 1000; ++i)
	{
		_free(ptr[i]);
	}
	_free(ptr);

	printf("After: ");
	printFreeList();
	printf("Test 4 passed: Allocate and free an array in a loop successfully\n\n");

	// Test 5: Allocate a memory of size 0
	int *ptr3 = (int *)_malloc(0);
	assert(ptr3 == NULL);
	printFreeList();
	printf("Test 5 passed: Allocate a memory of size 0 successfully\n\n");
	
	// Test 6: Free NULL pointer
	int *ptr4 = NULL;
	_free(ptr4);
	printf("Test 6 passed: Free wild pointer successfully\n\n");

	// Test 7: Double free
	int *ptr5 = (int *)_malloc(sizeof(int));
	int *ptr6 = ptr5;
	_free(ptr5);
	_free(ptr6);
	printf("Test 7 passed: Judge double free successfully\n\n");

	return 0;
}