Add more basic test cases cases for image class

This hopefully will begin extensive test suite for the image class to
maintain decent coverage for this major class of GIL.

test/core/image/CMakeLists.txt

@@ -7,6 +7,7 @@
 #
 foreach(_name
   concepts
+  alignment
   image)
   set(_test t_core_image_${_name})
   set(_target test_core_image_${_name})

test/core/image/Jamfile

@@ -11,3 +11,4 @@ import testing ;
 compile concepts.cpp ;
 
 run image.cpp ;
+run alignment.cpp ;

test/core/image/alignment.cpp

@@ -0,0 +1,125 @@
+//
+// Copyright 2022 Mateusz Loskot <mateusz at loskot dot net>
+//
+// Distributed under the Boost Software License, Version 1.0
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+#include <boost/gil.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include "test_fixture.hpp"
+#include "core/pixel/test_fixture.hpp"
+
+namespace gil = boost::gil;
+namespace fixture = boost::gil::test::fixture;
+
+struct test_constructor_with_alignment
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        std::size_t alignment = 0;
+        Image image(alignment);
+        BOOST_TEST(image.width() == 0);
+        BOOST_TEST(image.height() == 0);
+    }
+
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_constructor_with_alignment{});
+    }
+};
+
+struct test_constructor_with_alignment_allocator
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        std::size_t alignment = 0;
+        std::allocator<unsigned char> allocator;
+        Image image(alignment, allocator);
+        BOOST_TEST(image.width() == 0);
+        BOOST_TEST(image.height() == 0);
+    }
+
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_constructor_with_alignment_allocator{});
+    }
+};
+
+struct test_constructor_with_dimensions_alignment
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        gil::point_t const dimensions{256, 128};
+        std::size_t alignment = 0;
+        Image image(dimensions, alignment);
+        BOOST_TEST(image.width() == dimensions.x);
+        BOOST_TEST(image.height() == dimensions.y);
+    }
+
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_constructor_with_dimensions_alignment{});
+    }
+};
+
+struct test_constructor_with_dimensions_alignment_allocator
+{
+    template <typename Image>
+    void operator()(Image const&)
+    {
+        gil::point_t const dimensions{256, 128};
+        std::size_t alignment = 0;
+        std::allocator<unsigned char> allocator;
+        Image image(dimensions, alignment, allocator);
+        BOOST_TEST(image.width() == dimensions.x);
+        BOOST_TEST(image.height() == dimensions.y);
+    }
+
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_constructor_with_dimensions_alignment_allocator{});
+    }
+};
+
+struct test_constructor_with_dimensions_pixel_alignment
+{
+    template <typename Image>
+    void operator()(Image const &)
+    {
+        gil::point_t const dimensions{3, 3};
+        using pixel_t = typename Image::view_t::value_type;
+        pixel_t const rnd_pixel = fixture::pixel_generator<pixel_t>::random();
+
+        Image image(dimensions, rnd_pixel, 32u);
+        BOOST_TEST(image.width() == dimensions.x);
+        BOOST_TEST(image.height() == dimensions.y);
+
+        for (pixel_t const& p : gil::view(image))
+        {
+            BOOST_TEST(p == rnd_pixel);
+        }
+    }
+
+    static void run()
+    {
+        boost::mp11::mp_for_each<fixture::image_types>(test_constructor_with_dimensions_pixel_alignment{});
+    }
+};
+
+int main()
+{
+    test_constructor_with_alignment::run();
+    test_constructor_with_alignment_allocator::run();
+    test_constructor_with_dimensions_alignment::run();
+    test_constructor_with_dimensions_alignment_allocator::run();
+    test_constructor_with_dimensions_pixel_alignment::run();
+    test_constructor_with_dimensions_pixel_alignment::run();
+
+    return ::boost::report_errors();
+}

test/core/image/image.cpp

@@ -142,6 +142,7 @@ struct test_move_assignement
             BOOST_TEST_EQ(image.dimensions(), gil::point_t{});
         }
     }
+
     static void run()
     {
         boost::mp11::mp_for_each<fixture::image_types>(test_move_assignement{});

test/core/image/test_fixture.hpp

@@ -9,7 +9,6 @@
 #define BOOST_GIL_TEST_CORE_IMAGE_TEST_FIXTURE_HPP
 
 #include <boost/gil.hpp>
-#include <boost/assert.hpp>
 
 #include <cstdint>
 #include <initializer_list>
@@ -18,8 +17,6 @@
 #include <tuple>
 #include <type_traits>
 
-#include "core/test_fixture.hpp"
-
 namespace boost { namespace gil { namespace test { namespace fixture {
 
 using image_types = std::tuple
@@ -51,6 +48,16 @@ using rgb_interleaved_image_types = std::tuple
     gil::rgba32_image_t
 >;
 
+using bit_aligned_image_types = std::tuple
+<
+    gil::bit_aligned_image1_type<1, gil::gray_layout_t>::type,
+    gil::bit_aligned_image1_type<3, gil::gray_layout_t>::type,
+    gil::bit_aligned_image1_type<8, gil::gray_layout_t>::type,
+    gil::bit_aligned_image3_type<2, 2, 2, gil::rgb_layout_t>::type,
+    gil::bit_aligned_image3_type<5, 6, 5, gil::rgb_layout_t>::type,
+    gil::bit_aligned_image3_type<6, 6, 6, gil::rgb_layout_t>::type
+>;
+
 template <typename Image, typename Generator>
 auto generate_image(std::ptrdiff_t size_x, std::ptrdiff_t size_y, Generator&& generate) -> Image
 {