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113 lines
3.2 KiB
C++
113 lines
3.2 KiB
C++
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// Test contract checking and old value copies disabled within contracts.
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#include "../aux_/oteststream.hpp"
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#include "../aux_/cpcnt.hpp"
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#include <boost/contract/oldof.hpp>
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#include <boost/contract/guard.hpp>
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#include <boost/contract/public_function.hpp>
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#include <boost/contract/assert.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#include <sstream>
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boost::contract::aux::test::oteststream out;
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struct a {
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void invariant() const { out << "a::inv" << std::endl; }
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static void static_invariant() { out << "a::static_inv" << std::endl; }
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struct x_tag; typedef boost::contract::aux::test::cpcnt<x_tag, int> x_type;
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int f(x_type& x) {
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int result;
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boost::shared_ptr<x_type const> old_x = BOOST_CONTRACT_OLDOF(
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x_type::eval(x));
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boost::contract::guard c = boost::contract::public_function(this)
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.precondition([&] { out << "a::f::pre" << std::endl; })
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.postcondition([&] {
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out << "a::f::post" << std::endl;
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BOOST_CONTRACT_ASSERT(x.value == -old_x->value);
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BOOST_CONTRACT_ASSERT(result == old_x->value);
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})
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;
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out << "a::f::body" << std::endl;
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result = x.value;
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x.value = -x.value;
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return result;
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}
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};
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bool call_f() {
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a aa;
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a::x_type x; x.value = -123;
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return aa.f(x) == -123;
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}
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struct b {
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void invariant() const { out << "b::inv" << std::endl; }
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static void static_invariant() { out << "b::static_inv" << std::endl; }
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void g() {
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boost::contract::guard c = boost::contract::public_function(this)
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.precondition([&] {
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out << "b::g::pre" << std::endl;
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BOOST_CONTRACT_ASSERT(call_f());
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})
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.postcondition([&] {
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out << "b::g::post" << std::endl;
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BOOST_CONTRACT_ASSERT(call_f());
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})
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;
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out << "b::g::body" << std::endl;
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}
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};
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int main() {
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std::ostringstream ok;
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b bb;
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out.str("");
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bb.g();
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ok.str(""); ok
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<< "b::static_inv" << std::endl
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<< "b::inv" << std::endl
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<< "b::g::pre" << std::endl
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// Test only f's body (but not its contract) executed here.
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<< "a::f::body" << std::endl
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<< "b::g::body" << std::endl
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<< "b::static_inv" << std::endl
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<< "b::inv" << std::endl
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<< "b::g::post" << std::endl
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// Test only f's body (but not its contract) executed here.
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<< "a::f::body" << std::endl
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;
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BOOST_TEST(out.eq(ok.str()));
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// Test old values not copied for disabled contracts.
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BOOST_TEST_EQ(a::x_type::copies(), 0); BOOST_TEST_EQ(a::x_type::evals(), 0);
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out << std::endl;
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out.str("");
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call_f();
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// Double check a call to f outside another contract checks f's contracts.
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ok.str(""); ok
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<< "a::static_inv" << std::endl
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<< "a::inv" << std::endl
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<< "a::f::pre" << std::endl
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<< "a::f::body" << std::endl
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<< "a::static_inv" << std::endl
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<< "a::inv" << std::endl
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<< "a::f::post" << std::endl
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;
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BOOST_TEST(out.eq(ok.str()));
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return boost::report_errors();
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}
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