Test remove_Element by remove element[0].
head pointer point to element[1] address now.
tail pointer point to element[2].
It should return the address of element being removed after done.
Remove the printf command in test code.
Do some correction on test function.
Create test_removeElement_1.
After remove element 1, expect head pointer point to element[0].
Addon test for tail pointer and element[0]next pointer
tail pointer point to element[2] address, next pointer in element[0]
now point to element[2].
Final test for removing element 1.
Test the return of remove_Element function, it should not return NULL address.
It should return address of element[1].
Add test for removing element 2.
Add test for removing element 2.
head pointer should point to element[0].
tail pointer now should point to element[1] as element[1] is the last element.
Last test for removing element[2].
next pointer for element[1] should be point to NULL now.
The address return by remove_Element function should not be empty.
It should return address of element[2].