assert_contain

Asserts that a string contains text or that a range contains an element.

String-like values use substring semantics. Other ranges use element lookup through std::ranges::find, so an element must compare equal to the expected value.

#include <vector>
 
#include <kaycxx/test.hpp>
 
using namespace kaycxx::test;
 
int main() {
    assert_contain("hello world", "world");
    assert_contain("abc", 'b');
 
    auto values = std::vector{1, 2, 3};
    assert_contain(values, 2);
}

Null C string pointers never contain anything.