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Motivation: - state clearly what is covered with tests without reading non-trivial code - avoid cleverness - tests should be no-brainer - get closer to one test case targets one feature/beaviour with one check - replace obscure `throw std::exception` with diagnostics that are actually useful to pin-point failure cause and location - makes CI logs useful. - allow to select and run specific tests - make tests maintenance easy, quick and fun Propose new structure of tests that reflects the previous tests hierarchy, but organizes channel tests in test/channel directory with test programs each covering specific library feature (or set of closely related features). The refactored tests cover 100% of checks from the old `channel.cpp`, plus it refines or adds a bunch more. NOTE: old test/channel.cpp has not been removed yet. Common definitions from the single test/channel.cpp moved to channel_test_fixtures.hpp and namespace boost::gil::test::fixture: Classes and typedefs: - `do_test` as `fixture::channel` - `value_core` as `fixture::channel_value` - `reference_core` as `fixture::channel_reference` - `packed_reference_core` as `fixture::packed_channel_reference` - `packed_dynamic_reference_core` as `fixture::packed_dynamic_channel_reference` - `channel_archetype` and relatives to `channel_concepts.cpp` which is compile test in Jamfile - `test_packed_channel_reference()` parts as `fixture::packed_channels565` - `test_packed_dynamic_channel_reference()` parts as `fixture::packed_dynamic_channels565` Test case functions called from `do_test<T>::test_all`: - `test_channel_invert()` to `algorithm_channel_invert.cpp` suite - `test_channel_convert()` to `algorithm_channel_convert.cpp` suite - `test_channel_multiply()` to `algorithm_channel_multiply.cpp` suite - `test_channel_math()` split to `algorithm_channel_relation.cpp` and `algorithm_channel_arithmetic.cpp` Add test cases for each channel value type T as used to run from `test_channel_value_impl<T>`, `test_packed_channel_reference<T>` and `test_packed_dynamic_channel_reference<T>`. Add list of possible T-s defined as type-lists `fixture::channel_byte_types`, `fixture::channel_integer_types`, `channel_float_types` and `channel_bitfield_types` which used with `BOOST_AUTO_TEST_CASE_TEMPLATE` generate all possible combination of inputs. Add new `channel_test_fixture.cpp` is a self-test suite verifying the fixtures.
93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
//
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// Copyright 2005-2007 Adobe Systems Incorporated
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// Copyright 2018 Mateusz Loskot <mateusz at loskot dot net>
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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#include <boost/gil/gil_concept.hpp>
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#include <cstdint>
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#define BOOST_TEST_MODULE test_channel_concepts
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#include <gil_test_common.hpp>
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#include "channel_test_fixture.hpp"
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namespace gil = boost::gil;
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namespace fixture = boost::gil::test::fixture;
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// A channel archetype - to test the minimum requirements of the concept
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struct channel_value_archetype;
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struct channel_archetype
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{
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// equality comparable
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friend bool operator==(channel_archetype const&, channel_archetype const&)
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{ return true; }
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// inequality comparable
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friend bool operator!=(channel_archetype const&, channel_archetype const&)
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{ return false; }
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// less-than comparable
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friend bool operator<(channel_archetype const&, channel_archetype const&)
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{ return false; }
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// convertible to a scalar
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operator std::uint8_t() const { return 0; }
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channel_archetype& operator++() { return *this; }
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channel_archetype& operator--() { return *this; }
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channel_archetype operator++(int) { return *this; }
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channel_archetype operator--(int) { return *this; }
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template <typename Scalar>
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channel_archetype operator+=(Scalar) { return *this; }
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template <typename Scalar>
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channel_archetype operator-=(Scalar) { return *this; }
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template <typename Scalar>
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channel_archetype operator*=(Scalar) { return *this; }
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template <typename Scalar>
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channel_archetype operator/=(Scalar) { return *this; }
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using value_type = channel_value_archetype;
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using reference = channel_archetype;
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using const_reference = channel_archetype const;
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using pointer = channel_value_archetype*;
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using const_pointer = channel_value_archetype const*;
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BOOST_STATIC_CONSTANT(bool, is_mutable=true);
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static value_type min_value();
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static value_type max_value();
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};
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struct channel_value_archetype : public channel_archetype
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{
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// default constructible
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channel_value_archetype() {}
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// copy constructible
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channel_value_archetype(channel_value_archetype const&) = default;
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// assignable
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channel_value_archetype& operator=(channel_value_archetype const&)
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{return *this;}
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channel_value_archetype(std::uint8_t) {}
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};
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channel_value_archetype channel_archetype::min_value()
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{
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return channel_value_archetype();
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}
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channel_value_archetype channel_archetype::max_value()
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{
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return channel_value_archetype();
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}
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BOOST_AUTO_TEST_CASE(channel_minimal_requirements)
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{
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// Do only compile-time tests for the archetype
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// (because asserts like val1<val2 fail)
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boost::function_requires<gil::MutableChannelConcept<channel_archetype>>();
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fixture::channel_value<channel_value_archetype>();
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fixture::channel_reference<channel_archetype>();
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fixture::channel_reference<channel_archetype const&>();
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}
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