Added string compare test utility

[g1n93r]

I added string compare test utility ASSERT_STRSTR and ASSERT_NOT_STRSTR. I found it really usefull for testing json string output.

Enjoy!

[bvdberg]

There are some issues i see:

• cointain -> contain
• why do you check the combinations of hackstack + needle, where one can be NULL? Why not force both of them to be non-NULL?

[g1n93r]

There are some issues i see:

• cointain -> contain
• why do you check the combinations of hackstack + needle, where one can be NULL? Why not force both of them to be non-NULL?

You are right! I fixed it so :
ASSERT_NOT_STRSTR(NULL, ""); => PASS
ASSERT_NOT_STRSTR("", NULL); => PASS
ASSERT_NOT_STRSTR(NULL, NULL); => PASS
ASSERT_STRSTR(NULL, ""); => FAIL
ASSERT_STRSTR("", NULL); => FAIL
ASSERT_STRSTR(NULL, NULL); => FAIL
Both ASSERT_NOT_STRSTR(NULL, NULL) and ASSERT_STRSTR(NULL, NULL) are bit ambiguous as one could argue that NULL does contain NULL.
Would you make a special case for those?