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// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2006-2020, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2020, Knut Reinert & MPI für molekulare Genetik
// This file may be used, modified and/or redistributed under the terms of the 3-clause BSD-License
// shipped with this file and also available at: https://github.com/seqan/seqan3/blob/master/LICENSE.md
// -----------------------------------------------------------------------------------------------------
#include <gtest/gtest.h>
#include <seqan3/core/type_traits/iterator.hpp>
#include <seqan3/core/type_traits/range.hpp>
#include <seqan3/range/views/persist.hpp>
#include <seqan3/range/views/repeat.hpp>
#include <seqan3/range/views/take.hpp>
#include <seqan3/range/views/take_exactly.hpp>
#include <seqan3/std/algorithm>
#include <seqan3/std/ranges>
#include <seqan3/test/expect_range_eq.hpp>
TEST(repeat_view, deduction_guide)
{
int value = 0;
int const & value_cref = value;
seqan3::detail::repeat_view repeat_view1{value};
EXPECT_TRUE((std::same_as<decltype(repeat_view1), seqan3::detail::repeat_view<int>>));
seqan3::detail::repeat_view repeat_view2{value_cref};
EXPECT_TRUE((std::same_as<decltype(repeat_view2), seqan3::detail::repeat_view<int>>));
}
TEST(general, construction)
{
// char
char chr{'A'};
auto v = seqan3::views::repeat(chr);
EXPECT_TRUE((std::is_default_constructible_v<decltype(v)>));
EXPECT_TRUE((std::is_copy_constructible_v<decltype(v)>));
EXPECT_TRUE((std::is_move_constructible_v<decltype(v)>));
EXPECT_TRUE((std::is_copy_assignable_v<decltype(v)>));
EXPECT_TRUE((std::is_move_assignable_v<decltype(v)>));
// char const
char const chr_const{'A'};
auto v_const = seqan3::views::repeat(chr_const);
EXPECT_TRUE((std::is_default_constructible_v<decltype(v_const)>));
EXPECT_TRUE((std::is_copy_constructible_v<decltype(v_const)>));
EXPECT_TRUE((std::is_move_constructible_v<decltype(v_const)>));
EXPECT_TRUE((std::is_copy_assignable_v<decltype(v_const)>));
EXPECT_TRUE((std::is_move_assignable_v<decltype(v_const)>));
}
TEST(general, concept)
{
char chr{'A'};
auto v = seqan3::views::repeat(chr);
EXPECT_TRUE((std::ranges::range<decltype(v)>));
EXPECT_TRUE((std::ranges::input_range<decltype(v)>));
EXPECT_TRUE((std::ranges::forward_range<decltype(v)>));
EXPECT_TRUE((std::ranges::bidirectional_range<decltype(v)>));
EXPECT_TRUE((std::ranges::random_access_range<decltype(v)>));
EXPECT_FALSE((std::ranges::contiguous_range<decltype(v)>));
EXPECT_TRUE((std::ranges::view<decltype(v)>));
EXPECT_FALSE((std::ranges::sized_range<decltype(v)>));
EXPECT_FALSE((std::ranges::common_range<decltype(v)>));
EXPECT_TRUE((std::ranges::output_range<decltype(v), char>));
}
TEST(general, iterator)
{
auto v = seqan3::views::repeat('A');
EXPECT_TRUE(v.begin() == v.begin());
EXPECT_FALSE(v.begin() == v.end());
EXPECT_FALSE(v.end() == v.begin());
EXPECT_TRUE(v.begin() != v.end());
EXPECT_TRUE(v.end() != v.begin());
EXPECT_FALSE(std::ranges::cbegin(v) == std::ranges::cend(v));
EXPECT_FALSE(std::ranges::cend(v) == std::ranges::cbegin(v));
EXPECT_TRUE(std::ranges::cbegin(v) != std::ranges::cend(v));
EXPECT_TRUE(std::ranges::cend(v) != std::ranges::cbegin(v));
auto it = v.begin();
EXPECT_EQ(*it, 'A');
// random access iterator
++it;
EXPECT_EQ(*it, 'A');
it++;
EXPECT_EQ(*it, 'A');
--it;
EXPECT_EQ(*it, 'A');
it--;
EXPECT_EQ(*it, 'A');
it = it + 1;
EXPECT_EQ(*it, 'A');
it = 1 + it;
EXPECT_EQ(*it, 'A');
it += 1;
EXPECT_EQ(*it, 'A');
it = it - 1;
EXPECT_EQ(*it, 'A');
it = 1 - it;
EXPECT_EQ(*it, 'A');
it -= 1;
EXPECT_EQ(*it, 'A');
auto diff = (v.begin() + 1) - v.begin();
EXPECT_EQ(diff, 1);
// assignment
*it = 'X';
EXPECT_EQ(*it, 'X');
auto cit = std::ranges::cbegin(v);
cit = v.begin(); // assign it from const it
}
TEST(general, subscript_operator)
{
auto v = seqan3::views::repeat('A');
EXPECT_EQ(v[0], 'A');
EXPECT_EQ(v[126], 'A');
EXPECT_EQ(v[78634126], 'A');
v[234] = 'X';
EXPECT_EQ(v[0], 'X');
EXPECT_EQ(v[126], 'X');
EXPECT_EQ(v[78634126], 'X');
}
TEST(view, factory)
{
// const char
{
char const chr{'X'};
auto v = seqan3::views::repeat(chr);
EXPECT_EQ(*v.begin(), chr);
}
// string
{
std::string str{"foobar"};
auto v = seqan3::views::repeat(str);
EXPECT_EQ(*v.begin(), str);
EXPECT_EQ(v[2345], str);
}
// view
{
auto view = std::string{"foobar"} | seqan3::views::persist | std::views::take(3);
auto v = seqan3::views::repeat(view);
EXPECT_RANGE_EQ(*v.begin(), view);
}
// combinability
{
std::string str{"foobar"};
auto v = seqan3::views::repeat(str) | seqan3::views::take_exactly(3);
EXPECT_EQ(*v.begin(), str);
EXPECT_EQ(std::ranges::size(v), 3u);
}
}
constexpr char constexpr_class_and_iterator()
{
auto v = seqan3::views::repeat('A');
auto it = v.begin();
++it;
it[234] = 'X';
return *it;
}
constexpr char constexpr_view()
{
char chr{'A'};
auto v = seqan3::views::repeat(chr);
v[1324] = 'X';
return *v.begin();
}
TEST(general, constexpr_context)
{
{
constexpr char val = constexpr_class_and_iterator();
EXPECT_EQ(val, 'X');
}
{
constexpr char val = constexpr_view();
EXPECT_EQ(val, 'X');
}
}
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