1. x = 1
2. x > 1
3. x < 1 (Negative testing like negative value -1 -2 etc )
4. x = 0 (Negative testing)

With the above scenarios mentioned by vijay I wanna include
the following too -
x=0.99
x>=1
x>=1.00
x=1.01, x=2

While doing the testcases we should look out for all the 
possible errors that may comeout of the inputs that we 
give. So we should try our hand with not only integer 
values but also with the special characters.
The test cases are,
x=1;
x=23;
x=0;
x=.67;
x=a;
x=!;
x=NULL;
x= ;