etl/test/test_stack.cpp

/******************************************************************************
The MIT License(MIT)

Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com

Copyright(c) 2014 John Wellbelove

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/

#include "unit_test_framework.h"

#include <stack>

#include "data.h"

#include "etl/stack.h"

namespace
{
  struct Item
  {
    Item()
      : c('a')
      , i(1)
      , d(1.2)
    {
    }

    Item(char c_, int i_, double d_)
      : c(c_)
      , i(i_)
      , d(d_)
    {
    }

    char c;
    int i;
    double d;
  };

  bool operator == (const Item& lhs, const Item& rhs)
  {
    return (lhs.c == rhs.c) && (lhs.i == rhs.i) && (lhs.d == rhs.d);
  }

  struct ItemNTD
  {
    ItemNTD()
    {
      p = new char;
    }

    ItemNTD(const ItemNTD&)
      : p(new char)
    {
    }

    ~ItemNTD()
    {
      delete p;
    }

    char* p;
  };

  SUITE(test_stack)
  {
    typedef TestDataDC<std::string>  ItemDC;
    typedef TestDataNDC<std::string> ItemNDC;

    //*************************************************************************
    TEST(test_copy_constructor)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);
      stack.push(4);

      etl::stack<int, 4> stack2(stack);

      CHECK(stack.size() == stack2.size());

      while (!stack.empty())
      {
        CHECK_EQUAL(stack.top(), stack2.top());
        stack.pop();
        stack2.pop();
      }
    }

    //*************************************************************************
    TEST(test_delete_via_istack)
    {
      etl::stack<int, 4>* pstack = new etl::stack<int, 4>;

      etl::istack<int>* pistack = pstack;

      pistack->push(1);
      pistack->push(2);
      pistack->push(3);
      pistack->push(4);

      delete pistack;
    }

    //*************************************************************************
    TEST(test_empty)
    {
      etl::stack<ItemNDC, 4> stack;

      CHECK(stack.empty());

      stack.push(ItemNDC("1"));

      CHECK(!stack.empty());
    }

    //*************************************************************************
    TEST(test_full)
    {
      etl::stack<int, 4> stack;

      CHECK(!stack.full());

      stack.push(1);
      stack.push(2);
      stack.push(3);
      stack.push(4);

      CHECK(stack.full());
    }

    //*************************************************************************
    TEST(test_size)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);

      CHECK_EQUAL(3U, stack.size());
    }

    //*************************************************************************
    TEST(test_max_size)
    {
      etl::stack<int, 4> stack;

      CHECK_EQUAL(4U, stack.max_size());
    }

    //*************************************************************************
    TEST(test_clear)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.clear();
      CHECK_EQUAL(0U, stack.size());

      // Do it again to check that clear() didn't screw up the internals.
      stack.push(1);
      stack.push(2);
      CHECK_EQUAL(2U, stack.size());
      stack.clear();
      CHECK_EQUAL(0U, stack.size());
    }

    //*************************************************************************
    TEST(test_clear_non_pod)
    {
      etl::stack<ItemNTD, 4> stack;

      stack.push(ItemNTD());
      stack.push(ItemNTD());
      stack.clear();
      CHECK_EQUAL(0U, stack.size());

      // Do it again to check that clear() didn't screw up the internals.
      stack.push(ItemNTD());
      stack.push(ItemNTD());
      CHECK_EQUAL(2U, stack.size());
      stack.clear();
      CHECK_EQUAL(0U, stack.size());
    }

    //*************************************************************************
    TEST(test_push)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      CHECK_EQUAL(1U, stack.size());

      stack.push(2);
      CHECK_EQUAL(2U, stack.size());

      CHECK_EQUAL(2, stack.top());
      stack.pop();
      CHECK_EQUAL(1, stack.top());
    }

    //*************************************************************************
    TEST(test_emplace)
    {
      etl::stack<Item, 5> stack;

      stack.emplace();
      CHECK_EQUAL(1U, stack.size());

      stack.emplace('b', 2, 2.3);
      CHECK_EQUAL(2U, stack.size());

      stack.emplace('c', 3, 3.4);
      CHECK_EQUAL(3U, stack.size());

      stack.emplace('d', 4, 4.5);
      CHECK_EQUAL(4U, stack.size());

      stack.emplace('e', 5, 5.6);
      CHECK_EQUAL(5U, stack.size());

      CHECK(stack.top() == Item('e', 5, 5.6));
      stack.pop();
      CHECK(stack.top() == Item('d', 4, 4.5));
      stack.pop();
      CHECK(stack.top() == Item('c', 3, 3.4));
      stack.pop();
      CHECK(stack.top() == Item('b', 2, 2.3));
      stack.pop();
      CHECK(stack.top() == Item('a', 1, 1.2));
    }

    //*************************************************************************
    TEST(test_push_excess)
    {
      etl::stack<int, 4> stack;

      for (size_t i = 0UL; i < stack.max_size(); ++i)
      {
        stack.push(1);
      }

      CHECK_THROW(stack.push(1), etl::stack_full);
    }

    //*************************************************************************
    TEST(test_pop)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.pop();
      CHECK_EQUAL(1U, stack.size());
    }

    //*************************************************************************
    TEST(test_pop_into)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);
      stack.push(4);

      int i;

      stack.pop_into(i);
      CHECK_EQUAL(4, i);
      CHECK_EQUAL(3U, stack.size());

      stack.pop_into(i);
      CHECK_EQUAL(3, i);
      CHECK_EQUAL(2U, stack.size());

      stack.pop_into(i);
      CHECK_EQUAL(2, i);
      CHECK_EQUAL(1U, stack.size());

      stack.pop_into(i);
      CHECK_EQUAL(1, i);
      CHECK_EQUAL(0U, stack.size());
    }

    //*************************************************************************
    TEST(test_pop_into_stack)
    {
      etl::stack<int, 4> stack1;
      etl::stack<int, 4> stack2;

      stack1.push(1);
      stack1.push(2);
      stack1.push(3);
      stack1.push(4);

      stack1.pop_into(stack2);
      CHECK_EQUAL(1U, stack2.size());
      CHECK_EQUAL(4, stack2.top());

      stack1.pop_into(stack2);
      CHECK_EQUAL(2U, stack2.size());
      CHECK_EQUAL(3, stack2.top());

      stack1.pop_into(stack2);
      CHECK_EQUAL(3U, stack2.size());
      CHECK_EQUAL(2, stack2.top());

      stack1.pop_into(stack2);
      CHECK_EQUAL(4U, stack2.size());
      CHECK_EQUAL(1, stack2.top());

      int i;

      stack2.pop_into(i);
      CHECK_EQUAL(1, i);

      stack2.pop_into(i);
      CHECK_EQUAL(2, i);

      stack2.pop_into(i);
      CHECK_EQUAL(3, i);

      stack2.pop_into(i);
      CHECK_EQUAL(4, i);
    }

    //*************************************************************************
    TEST(test_pop_excess)
    {
      etl::stack<int, 4> stack;

      for (size_t i = 0UL; i < stack.max_size(); ++i)
      {
        stack.push(1);
      }

      for (size_t i = 0UL; i < stack.max_size(); ++i)
      {
        stack.pop();
      }

      CHECK_THROW(stack.pop(), etl::stack_empty);
    }

    //*************************************************************************
    TEST(test_top)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);

      CHECK_EQUAL(3, stack.top());

      stack.pop();
      CHECK_EQUAL(2, stack.top());

      stack.pop();
      CHECK_EQUAL(1, stack.top());
    }

    //*************************************************************************
    TEST(test_top_const)
    {
      etl::stack<int, 4> stack;
      const etl::stack<int, 4>& constQueue = stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);

      CHECK_EQUAL(3, constQueue.top());

      stack.pop();
      CHECK_EQUAL(2, constQueue.top());

      stack.pop();
      CHECK_EQUAL(1, constQueue.top());
    }

    //*************************************************************************
    TEST(test_multiple_push)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);

      bool pass = true;

      if (stack.top() != 3)
      {
        pass = false;
      }

      stack.pop();

      if (stack.top() != 2)
      {
        pass = false;
      }

      stack.pop();

      if (stack.top() != 1)
      {
        pass = false;
      }

      CHECK(pass);
    }

    //*************************************************************************
    TEST(test_assignment)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);
      stack.push(4);

      etl::stack<int, 4> stack2;

      // These should be overwritten.
      stack2.push(5);
      stack2.push(6);

      stack2 = stack;

      CHECK(stack.size() == stack2.size());

      while (!stack.empty())
      {
        CHECK_EQUAL(stack.top(), stack2.top());
        stack.pop();
        stack2.pop();
      }
    }

    //*************************************************************************
    TEST(test_assignment_interface)
    {
      etl::stack<int, 4> stack1;

      stack1.push(1);
      stack1.push(2);
      stack1.push(3);
      stack1.push(4);

      etl::stack<int, 4> stack2;

      etl::istack<int>& istack1 = stack1;
      etl::istack<int>& istack2 = stack2;

      istack2 = istack1;

      CHECK(istack1.size() == stack2.size());

      while (!stack1.empty())
      {
        CHECK_EQUAL(stack1.top(), stack2.top());
        stack1.pop();
        stack2.pop();
      }
    }


    //*************************************************************************
    TEST(test_self_assignment)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);
      stack.push(4);

#include "etl/private/diagnostic_self_assign_overloaded_push.h" 
      stack = stack;
#include "etl/private/diagnostic_pop.h" 
      
      CHECK(stack.max_size() == stack.size());

      CHECK_EQUAL(4, stack.top());
      stack.pop();

      CHECK_EQUAL(3, stack.top());
      stack.pop();

      CHECK_EQUAL(2, stack.top());
      stack.pop();

      CHECK_EQUAL(1, stack.top());
      stack.pop();
    }

    //*************************************************************************
    TEST(test_reverse)
    {
      etl::stack<int, 4> stack;

      stack.push(1);
      stack.push(2);
      stack.push(3);
      stack.push(4);

      stack.reverse();

      int i;

      stack.pop_into(i);
      CHECK_EQUAL(1, i);

      stack.pop_into(i);
      CHECK_EQUAL(2, i);

      stack.pop_into(i);
      CHECK_EQUAL(3, i);

      stack.pop_into(i);
      CHECK_EQUAL(4, i);
    }
  };
}