etl/test/test_factory.cpp

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

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

Copyright(c) 2017 jwellbelove

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******************************************************************************/

#include "UnitTest++.h"
#include "ExtraCheckMacros.h"

#include "factory.h"

#include <string>

namespace
{
  bool destructor;

  //***********************************
  struct Base
  {
    Base()
    {
      destructor = false;
    }

    virtual ~Base()
    {
    }

    virtual void Set() = 0;
  };

  //***********************************
  struct Derived1 : public Base
  {
    int i;

    Derived1()
      : i(0)
    {
    }

    ~Derived1()
    {
      destructor = true;
    }

    void Set()
    {
      i = 1;
    }
  };

  //***********************************
  struct Derived2 : public Base
  {
    double d;

    Derived2()
      : d(0.0)
    {
    }

    ~Derived2()
    {
      destructor = true;
    }

    void Set()
    {
      d = 1.2;
    }
  };

  //***********************************
  struct Derived3 : public Base
  {
    std::string s;

    Derived3()
      : s("constructed")
    {
    }

    Derived3(const char* p1)
      : s("constructed")
    {
      s.append(p1);
    }

    Derived3(const char* p1, const std::string& p2)
      : s("constructed")
    {
      s.append(p1);
      s.append(p2);
    }

    Derived3(const char* p1, const std::string& p2, const char* p3)
      : s("constructed")
    {
      s.append(p1);
      s.append(p2);
      s.append(p3);
    }

    Derived3(const char* p1, const std::string& p2, const char* p3, const std::string& p4)
      : s("constructed")
    {
      s.append(p1);
      s.append(p2);
      s.append(p3);
      s.append(p4);
    }

    ~Derived3()
    {
      destructor = true;
    }

    void Set()
    {
      s = "set";
    }
  };

  typedef etl::factory<4, Base, Derived1, Derived2, Derived3> Factory;

  SUITE(test_factory)
  {
    //*************************************************************************
    TEST(test_sizes)
    {
      Factory factory;

      size_t ms = Factory::MAX_ITEMS;
      CHECK_EQUAL(4U, ms);
      CHECK_EQUAL(4U, factory.max_items());
      CHECK_EQUAL(4U, factory.available());
      CHECK_EQUAL(0U, factory.size());
      CHECK(factory.empty());
      CHECK(!factory.full());

      factory.create<Derived1>();
      CHECK_EQUAL(3U, factory.available());
      CHECK_EQUAL(1U, factory.size());
      CHECK(!factory.empty());
      CHECK(!factory.full());

      factory.create<Derived1>();
      factory.create<Derived1>();
      factory.create<Derived1>();
      CHECK_EQUAL(0U, factory.available());
      CHECK_EQUAL(4U, factory.size());
      CHECK(!factory.empty());
      CHECK(factory.full());

      CHECK_THROW(factory.create<Derived1>(), etl::factory_cannot_create);
    }

    //*************************************************************************
    TEST(test_create_release)
    {
      Factory factory;

      Base* p;

      p = factory.create<Derived1>();
      Derived1* pd1 = static_cast<Derived1*>(p);
      CHECK_EQUAL(0, pd1->i);
      p->Set();
      CHECK_EQUAL(1, pd1->i);
      factory.destroy(p);
      CHECK(destructor);

      destructor = false;
      p = factory.create<Derived2>();
      Derived2* pd2 = static_cast<Derived2*>(p);
      CHECK_EQUAL(0.0, pd2->d);
      p->Set();
      CHECK_EQUAL(1.2, pd2->d);
      factory.destroy(p);
      CHECK(destructor);

      destructor = false;
      p = factory.create<Derived3>();
      Derived3* pd3 = static_cast<Derived3*>(p);
      CHECK_EQUAL("constructed", pd3->s);
      p->Set();
      CHECK_EQUAL("set", pd3->s);
      factory.destroy(p);
      CHECK(destructor);
    }

    //*************************************************************************
    TEST(test_create_emplace)
    {
      Factory factory;

      Base* p;
      Derived3* pd3;

      p = factory.create<Derived3>("1");
      pd3 = static_cast<Derived3*>(p);
      CHECK_EQUAL("constructed1", pd3->s);
      factory.destroy(p);

      p = factory.create<Derived3>("1", "2");
      pd3 = static_cast<Derived3*>(p);
      CHECK_EQUAL("constructed12", pd3->s);
      factory.destroy(p);

      p = factory.create<Derived3>("1", "2", "3");
      pd3 = static_cast<Derived3*>(p);
      CHECK_EQUAL("constructed123", pd3->s);
      factory.destroy(p);

      p = factory.create<Derived3>("1", "2", "3", "4");
      pd3 = static_cast<Derived3*>(p);
      CHECK_EQUAL("constructed1234", pd3->s);
      factory.destroy(p);
    }

    //*************************************************************************
    TEST(test_did_not_create)
    {
      Factory factory1;
      Factory factory2;

      Base* p;

      p = factory1.create<Derived1>();
      CHECK_NO_THROW(factory1.destroy(p));

      p = factory2.create<Derived1>();
      CHECK_THROW(factory1.destroy(p), etl::factory_did_not_create);

    }
  };
}