final/test/strings/basic.string/string.ops/string_compare/pointer.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <string>

// int compare(const charT *s) const;

#include <string>
#include <cassert>

int sign(int x)
{
    if (x == 0)
        return 0;
    if (x < 0)
        return -1;
    return 1;
}

template <class S>
void
test(const S& s, const typename S::value_type* str, int x)
{
    assert(sign(s.compare(str)) == sign(x));
}

typedef std::string S;

int main()
{
    test(S(""), "", 0);
    test(S(""), "abcde", -5);
    test(S(""), "abcdefghij", -10);
    test(S(""), "abcdefghijklmnopqrst", -20);
    test(S("abcde"), "", 5);
    test(S("abcde"), "abcde", 0);
    test(S("abcde"), "abcdefghij", -5);
    test(S("abcde"), "abcdefghijklmnopqrst", -15);
    test(S("abcdefghij"), "", 10);
    test(S("abcdefghij"), "abcde", 5);
    test(S("abcdefghij"), "abcdefghij", 0);
    test(S("abcdefghij"), "abcdefghijklmnopqrst", -10);
    test(S("abcdefghijklmnopqrst"), "", 20);
    test(S("abcdefghijklmnopqrst"), "abcde", 15);
    test(S("abcdefghijklmnopqrst"), "abcdefghij", 10);
    test(S("abcdefghijklmnopqrst"), "abcdefghijklmnopqrst", 0);
}