ah_stdc_utils_test.cc

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/*
                          Aleph_w
 
  Data structures & Algorithms
  version 2.0.0b
  https://github.com/lrleon/Aleph-w
 
  This file is part of Aleph-w library
 
  Copyright (c) 2002-2026 Leandro Rabindranath Leon
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
 
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
 
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
*/
 
 
#include <gtest/gtest.h>
 
#include <ah_stdc++_utils.H>
 
#include <stdexcept>
 
using namespace Aleph;
 
// ============================================================================
// Mock Container and Iterator for testing
// ============================================================================
 
namespace
{
 
// Simple mock container
class MockContainer
{
  int id_;
 
public:
  explicit MockContainer(int id) : id_(id) {}
  int id() const { return id_; }
};
 
// Mock iterator that tracks which container it belongs to
class MockIterator
{
  const MockContainer* container_;
 
public:
  explicit MockIterator(const MockContainer* c = nullptr) : container_(c) {}
 
  // Verify this iterator belongs to the given container
  bool verify(const MockContainer& c) const
  {
    return container_ == &c;
  }
 
  // Verify this iterator and another belong to the same container
  bool verify(const MockIterator& other) const
  {
    return container_ == other.container_;
  }
 
  const MockContainer* container() const { return container_; }
};
 
} // namespace
 
// ============================================================================
// verify_container_and_iterator Tests
// ============================================================================
 
TEST(VerifyContainerAndIterator, ValidIteratorDoesNotThrow)
{
  MockContainer container(1);
  MockIterator iter(&container);
 
  EXPECT_NO_THROW(verify_container_and_iterator(container, iter));
}
 
TEST(VerifyContainerAndIterator, InvalidIteratorThrows)
{
  MockContainer container1(1);
  MockContainer container2(2);
  MockIterator iter(&container1);
 
  EXPECT_THROW(verify_container_and_iterator(container2, iter), std::domain_error);
}
 
TEST(VerifyContainerAndIterator, NullIteratorThrows)
{
  MockContainer container(1);
  MockIterator iter(nullptr);
 
  EXPECT_THROW(verify_container_and_iterator(container, iter), std::domain_error);
}
 
TEST(VerifyContainerAndIterator, ExceptionMessageIsDescriptive)
{
  MockContainer container1(1);
  MockContainer container2(2);
  MockIterator iter(&container1);
 
  try
    {
      verify_container_and_iterator(container2, iter);
      FAIL() << "Expected exception was not thrown";
    }
  catch (const std::domain_error& e)
    {
      std::string msg = e.what();
      EXPECT_TRUE(msg.find("Iterator") != std::string::npos ||
                  msg.find("iterator") != std::string::npos);
    }
}
 
// ============================================================================
// verify_iterators Tests
// ============================================================================
 
TEST(VerifyIterators, SameContainerDoesNotThrow)
{
  MockContainer container(1);
  MockIterator iter1(&container);
  MockIterator iter2(&container);
 
  EXPECT_NO_THROW(verify_iterators(iter1, iter2));
}
 
TEST(VerifyIterators, DifferentContainersThrows)
{
  MockContainer container1(1);
  MockContainer container2(2);
  MockIterator iter1(&container1);
  MockIterator iter2(&container2);
 
  EXPECT_THROW(verify_iterators(iter1, iter2), std::domain_error);
}
 
TEST(VerifyIterators, SameIteratorDoesNotThrow)
{
  MockContainer container(1);
  MockIterator iter(&container);
 
  // Same iterator compared to itself should pass
  EXPECT_NO_THROW(verify_iterators(iter, iter));
}
 
TEST(VerifyIterators, BothNullIteratorsDoNotThrow)
{
  MockIterator iter1(nullptr);
  MockIterator iter2(nullptr);
 
  // Both null - same "container" (none)
  EXPECT_NO_THROW(verify_iterators(iter1, iter2));
}
 
TEST(VerifyIterators, OneNullIteratorThrows)
{
  MockContainer container(1);
  MockIterator iter1(&container);
  MockIterator iter2(nullptr);
 
  EXPECT_THROW(verify_iterators(iter1, iter2), std::domain_error);
}
 
// ============================================================================
// verify_container_and_iterators (2-iterator overload) Tests
// ============================================================================
 
TEST(VerifyContainerAndIterators2, BothIteratorsValidDoesNotThrow)
{
  MockContainer container(1);
  MockIterator iter1(&container);
  MockIterator iter2(&container);
 
  EXPECT_NO_THROW(verify_container_and_iterators(container, iter1, iter2));
}
 
TEST(VerifyContainerAndIterators2, FirstIteratorInvalidThrows)
{
  MockContainer container1(1);
  MockContainer container2(2);
  MockIterator iter1(&container2);  // Wrong container
  MockIterator iter2(&container1);
 
  EXPECT_THROW(verify_container_and_iterators(container1, iter1, iter2),
               std::domain_error);
}
 
TEST(VerifyContainerAndIterators2, SecondIteratorInvalidThrows)
{
  MockContainer container1(1);
  MockContainer container2(2);
  MockIterator iter1(&container1);
  MockIterator iter2(&container2);  // Wrong container
 
  EXPECT_THROW(verify_container_and_iterators(container1, iter1, iter2),
               std::domain_error);
}
 
TEST(VerifyContainerAndIterators2, BothIteratorsInvalidThrows)
{
  MockContainer container1(1);
  MockContainer container2(2);
  MockIterator iter1(&container2);
  MockIterator iter2(&container2);
 
  EXPECT_THROW(verify_container_and_iterators(container1, iter1, iter2),
               std::domain_error);
}
 
// ============================================================================
// verify_container_and_iterators (3-iterator overload) Tests
// ============================================================================
 
TEST(VerifyContainerAndIterators3, ValidDistinctIteratorsDoNotThrow)
{
  MockContainer dest_container(1);
  MockContainer src_container(2);
 
  MockIterator dest_iter(&dest_container);
  MockIterator src_iter1(&src_container);
  MockIterator src_iter2(&src_container);
 
  EXPECT_NO_THROW(verify_container_and_iterators(
      dest_container, dest_iter, src_iter1, src_iter2));
}
 
TEST(VerifyContainerAndIterators3, DestIteratorInvalidThrows)
{
  MockContainer dest_container(1);
  MockContainer src_container(2);
  MockContainer other_container(3);
 
  MockIterator dest_iter(&other_container);  // Wrong!
  MockIterator src_iter1(&src_container);
  MockIterator src_iter2(&src_container);
 
  EXPECT_THROW(verify_container_and_iterators(
      dest_container, dest_iter, src_iter1, src_iter2), std::domain_error);
}
 
TEST(VerifyContainerAndIterators3, SourceIteratorsFromDifferentContainersThrows)
{
  MockContainer dest_container(1);
  MockContainer src_container1(2);
  MockContainer src_container2(3);
 
  MockIterator dest_iter(&dest_container);
  MockIterator src_iter1(&src_container1);
  MockIterator src_iter2(&src_container2);  // Different from src_iter1!
 
  EXPECT_THROW(verify_container_and_iterators(
      dest_container, dest_iter, src_iter1, src_iter2), std::domain_error);
}
 
TEST(VerifyContainerAndIterators3, DestAndSourceSameContainerThrows)
{
  MockContainer container(1);
 
  MockIterator dest_iter(&container);
  MockIterator src_iter1(&container);  // Same as dest!
  MockIterator src_iter2(&container);
 
  // This should throw because dest and source are the same container
  EXPECT_THROW(verify_container_and_iterators(
      container, dest_iter, src_iter1, src_iter2), std::domain_error);
}
 
// ============================================================================
// Integration with real Aleph containers (if available)
// ============================================================================
 
// Note: Additional tests with real DynList/DynArray iterators could be added
// here to verify integration with actual Aleph container types.
 
int main(int argc, char** argv)
{
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}