utl/test/tests/test_1w_impl.cpp

/*!
 * \file test_1w_impl.cpp
 *
 * Copyright (C) 2018 Christos Choutouridis
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
#include <gtest/gtest.h>
#include <utl/com/_1wire_uart.h>

/*!
 * \warning
 *    This is not right way of testing communication interfaces. We have to
 *    implement a Mock object to simulate the slave's behavior. Until then
 *    we have the following.
 */
namespace test_1w {
   using namespace utl;

   // implementer class stub
   class OW : public _1wire_uart_i<OW> {
      friend _1wire_uart_i<OW>;
      byte_t UART_RW (byte_t byte) {
         // return the given. This also mean no-device
         return byte;
      }
      void UART_BR (uint32_t br) {} // imaginary baud-rate implementation
   };

   // fixture
   class Test_1w_impl : public ::testing::Test {
   protected:
      //void SetUp() override { }
      //void TearDown() override { }
      OW ow;
   };

   TEST_F(Test_1w_impl, TestConcept) {
      EXPECT_EQ(_1Wire_i<OW>, true);
   }

   TEST_F(Test_1w_impl, TestConstruction) {
      EXPECT_GT(sizeof(ow), 0UL);
   }

   TEST_F (Test_1w_impl, TestFunctionality) {
      byte_t b {42};

      _1wire_id_t id = ow.first(OW::Speed::STD);
      EXPECT_EQ (id != _1wire_id_t::nullDev(), false); // as long as there is no slave Mock

      EXPECT_EQ (ow.reset(OW::Speed::STD), false);    // as long as there is no slave Mock
      //ow.match(id, OW::Speed::STD);
      EXPECT_EQ(ow.rx_data(OW::Speed::STD), 0xFF);
      EXPECT_EQ(ow.tx_data(b, OW::Speed::STD), 42);

   }
}