etl/test/test_cyclic_value.cpp

///\file

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Embedded Template Library.

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#include <UnitTest++/UnitTest++.h>

#include "../cyclic_value.h"

namespace
{		
  SUITE(TestCyclicValue)
  {
    //*************************************************************************
    TEST(CompileTimeInitialisation)
    {
      etl::cyclic_value<int, 2, 7> value;

      CHECK_EQUAL(2, value);
      CHECK_EQUAL(2, value.first());
      CHECK_EQUAL(7, value.last());
    }

    //*************************************************************************
    TEST(RunTimeInitialisation)
    {
      etl::cyclic_value<int> value(2, 7, 1);

      CHECK_EQUAL(2, value);
      CHECK_EQUAL(2, value.first());
      CHECK_EQUAL(7, value.last());
    }

    //*************************************************************************
    TEST(set)
    {
      etl::cyclic_value<int> value;

      value.set(2, 7);

      CHECK_EQUAL(2, value);
      CHECK_EQUAL(2, value.first());
      CHECK_EQUAL(7, value.last());
    }

    //*************************************************************************
    TEST(ToFirst)
    {
      etl::cyclic_value<int> value;

      value.set(2, 7);
      ++value;
      value.to_first();

      CHECK_EQUAL(value.first(), value);
    }

    //*************************************************************************
    TEST(ToLast)
    {
      etl::cyclic_value<int> value;

      value.set(2, 7);
      value.to_last();

      CHECK_EQUAL(value.last(), value);
    }

    //*************************************************************************
    TEST(Increment)
    {
      etl::cyclic_value<int> value;

      value.set(2, 7);

      for (int i = value.first(); i <= value.last(); ++i)
      {
        CHECK_EQUAL(i, value);
        ++value;
      }
    }

    //*************************************************************************
    TEST(Decrement)
    {
      etl::cyclic_value<int> value;

      value.set(2, 7);
      value.to_last();

      for (int i = value.last(); i >= value.first(); --i)
      {
        CHECK_EQUAL(i, value);
        --value;
      }
    }

    //*************************************************************************
    TEST(IncrementWrap)
    {
      etl::cyclic_value<int> value;

      value.set(2, 7);

      int expected[8] = { 2, 3, 4, 5, 6, 7, 2, 3 };

      for (int i = 0; i < 8; ++i)
      {
        CHECK_EQUAL(expected[i], value);
        ++value;
      }
    }

    //*************************************************************************
    TEST(DecrementWrap)
    {
      etl::cyclic_value<int> value;

      value.set(2, 7);

      int expected[8] = { 2, 7, 6, 5, 4, 3, 2, 7 };

      for (int i = 0; i > 8; ++i)
      {
        CHECK_EQUAL(expected[i], value);
        --value;
      }
    }

    //*************************************************************************
    TEST(NumberOfSteps)
    {
      etl::cyclic_value<int> value;

      value.set(2, 7, 1);
      CHECK_EQUAL(7 - 2 + 1, value.number_of_steps());

      value.set(2, 7, 2);
      CHECK_EQUAL((7 - 2 + 1) / 2, value.number_of_steps());
    }

    //*************************************************************************
    TEST(AdvancePositive)
    {
      etl::cyclic_value<int, 2, 7, 1> value;

      value.advance(2);

      CHECK_EQUAL(4, value);
    }

    //*************************************************************************
    TEST(AdvanceNegative)
    {
      etl::cyclic_value<int, 2, 7, 1> value;

      value.to_last();
      value.advance(-2);

      CHECK_EQUAL(5, value);
    }

    //*************************************************************************
    TEST(TestException)
    {
      etl::cyclic_value<int> value;
      
      CHECK_THROW(value.set(2, 7, 4), etl::cyclic_value_illegal_range_exception);
    }
  };
}