fsfw/contrib/fsfw_contrib/etl-20.39.4/test/test_variant_pool.cpp

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

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

Copyright(c) 2017 John Wellbelove

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

#include "unit_test_framework.h"

#include "etl/variant_pool.h"

#include <string>
#include <type_traits>

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";
    }
  };

  //***********************************
  struct NonDerived
  {
    NonDerived()
      : s("constructed")
    {
    }

    ~NonDerived()
    {
      destructor = true;
    }

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

    std::string s;
  };

  const size_t SIZE = 5;

  // Notice that the type declaration order is not important.
  typedef etl::variant_pool<SIZE, Derived1, NonDerived, Derived3, Derived2, int> Factory;

  SUITE(test_variant_pool)
  {
    //*************************************************************************
    TEST(test_sizes)
    {
      Factory variant_pool;

      size_t ms = Factory::MAX_SIZE;
      CHECK_EQUAL(SIZE, ms);
      CHECK_EQUAL(SIZE, variant_pool.max_size());
      CHECK_EQUAL(SIZE, variant_pool.available());
      CHECK_EQUAL(0U, variant_pool.size());
      CHECK(variant_pool.empty());
      CHECK(!variant_pool.full());

      variant_pool.create<Derived1>();
      CHECK_EQUAL(SIZE - 1U, variant_pool.available());
      CHECK_EQUAL(1U, variant_pool.size());
      CHECK(!variant_pool.empty());
      CHECK(!variant_pool.full());

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

      CHECK_THROW(variant_pool.create<Derived1>(), etl::pool_no_allocation);
    }

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

      Base* p;

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

      // Derived 2
      destructor = false;
      p = variant_pool.create<Derived2>();
      Derived2* pd2 = static_cast<Derived2*>(p);
      CHECK_EQUAL(0.0, pd2->d);
      p->Set();
      CHECK_EQUAL(1.2, pd2->d);
      variant_pool.destroy(p);
      CHECK(destructor);

      // Derived 3
      destructor = false;
      p = variant_pool.create<Derived3>();
      Derived3* pd3 = static_cast<Derived3*>(p);
      CHECK_EQUAL("constructed", pd3->s);
      p->Set();
      CHECK_EQUAL("set", pd3->s);
      variant_pool.destroy(p);
      CHECK(destructor);

      // Non Derived
      destructor = false;
      NonDerived* pnd = variant_pool.create<NonDerived>();
      CHECK_EQUAL("constructed", pnd->s);
      pnd->Set();
      CHECK_EQUAL("set", pnd->s);
      variant_pool.destroy(pnd);
      CHECK(destructor);

      // Integral
      int* pi = variant_pool.create<int>();
      variant_pool.destroy(pi);
    }

    //*************************************************************************
    TEST(test_create_release_const)
    {
      Factory variant_pool;

      const Derived1& d = *variant_pool.create<Derived1>();

      CHECK_EQUAL(0, d.i);
      variant_pool.destroy(&d);
      CHECK(destructor);

    }

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

      Base* p;
      Derived3* pd3;

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

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

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

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

    //*************************************************************************
    TEST(test_did_not_create)
    {
      Factory variant_pool1;
      Factory variant_pool2;

      Base* p;

      p = variant_pool1.create<Derived1>();
      CHECK_NO_THROW(variant_pool1.destroy(p));

      p = variant_pool2.create<Derived1>();
      CHECK_THROW(variant_pool1.destroy(p), etl::pool_object_not_in_pool);
    }
  };
}