turtle/test/test_constraints.cpp

// http://turtle.sourceforge.net
//
// Copyright Mathieu Champlon 2008
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#include <turtle/constraints.hpp>
#include <boost/test/auto_unit_test.hpp>
#include <boost/typeof/typeof.hpp>

BOOST_AUTO_TEST_CASE(all_comparison_constraints_can_be_instanciated)
{
    mock::equal(0);
    mock::less(0);
    mock::greater(0);
    mock::less_equal(0);
    mock::greater_equal(0);
}

BOOST_AUTO_TEST_CASE(constraints_can_be_negated_using_the_not_operator)
{
    !mock::any;
    !mock::affirm;
    !mock::negate;
    !mock::evaluate;
    !mock::equal(0);
    !mock::less(0);
    !mock::greater(0);
    !mock::less_equal(0);
    !mock::greater_equal(0);
}

BOOST_AUTO_TEST_CASE(constraints_can_be_combined_using_the_or_operator)
{
    mock::less(0) || mock::greater(0);
}

BOOST_AUTO_TEST_CASE(constraints_can_be_combined_using_the_and_operator)
{
    mock::less(0) && mock::greater(0);
}

BOOST_AUTO_TEST_CASE(equal_constraint)
{
    BOOST_CHECK(mock::equal(std::string("string")).c_("string"));
    BOOST_CHECK(!mock::equal(std::string("string")).c_("not string"));
    {
        std::string s;
        BOOST_AUTO(c, mock::equal(boost::cref(s)));
        s = "string";
        BOOST_CHECK(c.c_("string"));
    }
#ifdef MOCK_SMART_PTR
    {
        std::unique_ptr<int> i;
        std::unique_ptr<int> j(new int(3));
        BOOST_CHECK(!mock::equal(i).c_(j));
        BOOST_CHECK(!mock::equal(j).c_(i));
        BOOST_CHECK(mock::equal(i).c_(i));
        BOOST_CHECK(mock::equal(j).c_(j));
    }
#endif
}

BOOST_AUTO_TEST_CASE(equal_constraint_deref){ { int i = 3;
BOOST_CHECK(mock::equal(3).c_(&i));
BOOST_CHECK(!mock::equal(7).c_(&i));
}
{
    int* i = 0;
    BOOST_CHECK(!mock::equal(3).c_(i));
}
#ifdef MOCK_SMART_PTR
{
    std::unique_ptr<int> j(new int(3));
    BOOST_CHECK(mock::equal(3).c_(j));
    std::unique_ptr<int> i;
    BOOST_CHECK(!mock::equal(3).c_(i));
}
#endif // MOCK_SMART_PTR
}

BOOST_AUTO_TEST_CASE(same_constraint){ { int i = 0;
int j = 0;
BOOST_CHECK_EQUAL(i, j);
BOOST_CHECK(!mock::same(i).c_(j));
BOOST_CHECK(mock::same(i).c_(i));
}
{
    int i = 0;
    int j = 0;
    BOOST_CHECK_EQUAL(i, j);
    mock::constraint<mock::detail::same<const boost::reference_wrapper<const int>>> c = mock::same(boost::cref(i));
    BOOST_CHECK(!c.c_(j));
    BOOST_CHECK(c.c_(i));
}
#ifdef MOCK_NULLPTR
{
    std::nullptr_t p;
    BOOST_CHECK(mock::same(p).c_(p));
}
#endif
}

BOOST_AUTO_TEST_CASE(assign_constraint)
{
    {
        int i = 0;
        BOOST_CHECK(mock::assign(3).c_(i));
        BOOST_CHECK_EQUAL(3, i);
    }
    {
        int i = 0;
        BOOST_CHECK(mock::assign(3).c_(&i));
        BOOST_CHECK_EQUAL(3, i);
    }
    {
        const int* i = 0;
        const int j = 1;
        BOOST_CHECK(mock::assign(&j).c_(i));
        BOOST_CHECK_EQUAL(&j, i);
    }
    {
        int* i = 0;
        const int j = 1;
        BOOST_CHECK(!mock::assign(j).c_(i));
        BOOST_CHECK(!i);
    }
    {
        int i = 0;
        int j = 1;
        mock::constraint<mock::detail::assign<boost::reference_wrapper<const int>>> c = mock::assign(boost::cref(j));
        BOOST_CHECK(c.c_(i));
        BOOST_CHECK_EQUAL(1, i);
        j = 3;
        BOOST_CHECK(c.c_(i));
        BOOST_CHECK_EQUAL(3, i);
    }
    {
        int i = 0;
        int j = 1;
        mock::constraint<mock::detail::assign<boost::reference_wrapper<const int>>> c = mock::assign(boost::cref(j));
        BOOST_CHECK(c.c_(&i));
        BOOST_CHECK_EQUAL(1, i);
        j = 3;
        BOOST_CHECK(c.c_(&i));
        BOOST_CHECK_EQUAL(3, i);
    }
    {
        const int* i = 0;
        int k = 1;
        int* j = &k;
        mock::constraint<mock::detail::assign<boost::reference_wrapper<int* const>>> c = mock::assign(boost::cref(j));
        BOOST_CHECK(c.c_(i));
        BOOST_CHECK_EQUAL(j, i);
        j = 0;
        BOOST_CHECK(c.c_(i));
        BOOST_CHECK_EQUAL(j, i);
    }
}

BOOST_AUTO_TEST_CASE(retrieve_constraint)
{
    {
        int i = 0;
        const int j = 1;
        BOOST_CHECK(mock::retrieve(i).c_(j));
        BOOST_CHECK_EQUAL(i, j);
    }
    {
        int* i = 0;
        int j = 1;
        BOOST_CHECK(mock::retrieve(i).c_(&j));
        BOOST_CHECK_EQUAL(i, &j);
    }
    {
        const int* i = 0;
        const int j = 1;
        BOOST_CHECK(mock::retrieve(i).c_(j));
        BOOST_CHECK_EQUAL(i, &j);
    }
    {
        const int* i = 0;
        int j = 1;
        BOOST_CHECK(mock::retrieve(i).c_(j));
        BOOST_CHECK_EQUAL(i, &j);
    }
    {
        int* i = 0;
        int j = 1;
        BOOST_CHECK(mock::retrieve(i).c_(j));
        BOOST_CHECK_EQUAL(i, &j);
    }
    {
        const int* i = 0;
        const int j = 1;
        BOOST_CHECK(mock::retrieve(i).c_(j));
        BOOST_CHECK_EQUAL(i, &j);
    }
    {
        int** i = 0;
        int* j = 0;
        BOOST_CHECK(mock::retrieve(i).c_(j));
        BOOST_CHECK_EQUAL(i, &j);
    }
    {
        const int** i = 0;
        const int* j = 0;
        BOOST_CHECK(mock::retrieve(i).c_(j));
        BOOST_CHECK_EQUAL(i, &j);
    }
    {
        int i = 0;
        const int j = 1;
        BOOST_CHECK(mock::retrieve(boost::ref(i)).c_(j));
        BOOST_CHECK_EQUAL(i, j);
    }
    {
        const int* i = 0;
        const int j = 1;
        BOOST_CHECK(mock::retrieve(boost::ref(i)).c_(j));
        BOOST_CHECK_EQUAL(i, &j);
    }
#ifdef MOCK_NULLPTR
    {
        std::nullptr_t* i = 0;
        std::nullptr_t j;
        BOOST_CHECK(mock::retrieve(i).c_(j));
        BOOST_CHECK_EQUAL(i, &j);
    }
#endif
#ifdef MOCK_SMART_PTR
    {
        std::unique_ptr<int> i;
        std::unique_ptr<int> j(new int(3));
        BOOST_CHECK(mock::retrieve(i).c_(boost::move(j)));
        BOOST_REQUIRE(i);
        BOOST_CHECK_EQUAL(3, *i);
        BOOST_CHECK(!j);
    }
#endif
}

namespace {
struct A
{};
struct B
{
    B& operator=(const A&) { return *this; }
};
} // namespace

BOOST_AUTO_TEST_CASE(retrieve_constraint_uses_assignment_operator)
{
    B b;
    const A a = A();
    mock::retrieve(b).c_(a);
}

BOOST_AUTO_TEST_CASE(affirm_constraint)
{
    {
        int* i = 0;
        int j;
        BOOST_CHECK(!mock::affirm.c_(i));
        BOOST_CHECK(mock::affirm.c_(&j));
    }
    {
#ifdef MOCK_SMART_PTR
        std::unique_ptr<int> i;
        std::unique_ptr<int> j(new int(3));
        BOOST_CHECK(!mock::affirm.c_(i));
        BOOST_CHECK(mock::affirm.c_(j));
#endif
    }
}

BOOST_AUTO_TEST_CASE(negate_constraint)
{
    int* i = 0;
    int j;
    BOOST_CHECK(mock::negate.c_(i));
    BOOST_CHECK(!mock::negate.c_(&j));
}

namespace {
bool return_true()
{
    return true;
}
bool return_false()
{
    return false;
}
} // namespace

BOOST_AUTO_TEST_CASE(call_constraint)
{
    BOOST_CHECK(mock::call(&return_true).c_());
    BOOST_CHECK(!mock::call(&return_false).c_());
}

BOOST_AUTO_TEST_CASE(evaluate_constraint)
{
    BOOST_CHECK(mock::evaluate.c_(&return_true));
    BOOST_CHECK(!mock::evaluate.c_(&return_false));
}

BOOST_AUTO_TEST_CASE(contain_constraint_with_const_char_ptr)
{
    BOOST_CHECK(mock::contain("string").c_("this is a string"));
    BOOST_CHECK(mock::contain("string").c_(std::string("this is a string")));
    BOOST_CHECK(!mock::contain("not found").c_("this is a string"));
    BOOST_CHECK(!mock::contain("not found").c_(std::string("this is a string")));
    {
        const char* s = 0;
        mock::constraint<mock::detail::contain<boost::reference_wrapper<const char* const>>> c =
          mock::contain(boost::cref(s));
        s = "string";
        BOOST_CHECK(c.c_("this is a string"));
        BOOST_CHECK(c.c_(std::string("this is a string")));
        s = "not found";
        BOOST_CHECK(!c.c_("this is a string"));
        BOOST_CHECK(!c.c_(std::string("this is a string")));
    }
}

BOOST_AUTO_TEST_CASE(contain_constraint_with_strings)
{
    BOOST_CHECK(mock::contain(std::string("string")).c_("this is a string"));
    BOOST_CHECK(mock::contain(std::string("string")).c_(std::string("this is a string")));
    BOOST_CHECK(!mock::contain(std::string("not found")).c_("this is a string"));
    BOOST_CHECK(!mock::contain(std::string("not found")).c_(std::string("this is a string")));
    {
        std::string s;
        mock::constraint<mock::detail::contain<boost::reference_wrapper<const std::string>>> c =
          mock::contain(boost::cref(s));
        s = "string";
        BOOST_CHECK(c.c_("this is a string"));
        BOOST_CHECK(c.c_(std::string("this is a string")));
        s = "not found";
        BOOST_CHECK(!c.c_("this is a string"));
        BOOST_CHECK(!c.c_(std::string("this is a string")));
    }
}

namespace {
struct type_with_overloaded_address_operator
{
    void operator&() {}
    void operator&() const {}
};
} // namespace

BOOST_AUTO_TEST_CASE(type_with_overloaded_address_operator_can_be_used_in_constraints)
{
    type_with_overloaded_address_operator t;
    mock::same(t).c_(t);
    mock::retrieve(t).c_(t);
    type_with_overloaded_address_operator* pt;
    mock::retrieve(pt).c_(t);
}

BOOST_AUTO_TEST_CASE(close_constraint)
{
    BOOST_CHECK(mock::close(12.0, 0.0001).c_(12));
    BOOST_CHECK(!mock::close(12.0, 0.0001).c_(13));
}

BOOST_AUTO_TEST_CASE(close_fraction_constraint)
{
    BOOST_CHECK(mock::close_fraction(12.0, 0.0001).c_(12));
    BOOST_CHECK(!mock::close_fraction(12.0, 0.0001).c_(13));
}

BOOST_AUTO_TEST_CASE(small_constraint)
{
    BOOST_CHECK(mock::small(0.0001).c_(0.));
    BOOST_CHECK(!mock::small(0.0001).c_(12.));
}

BOOST_AUTO_TEST_CASE(near_constraint)
{
    BOOST_CHECK(mock::near(12.0, 0.0001).c_(12));
    BOOST_CHECK(!mock::near(12.0, 0.0001).c_(13));
}