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// SPDX-FileCopyrightText: 2006-2025 Knut Reinert & Freie Universität Berlin
// SPDX-FileCopyrightText: 2016-2025 Knut Reinert & MPI für molekulare Genetik
// SPDX-License-Identifier: BSD-3-Clause
#include <gtest/gtest.h>
#include <algorithm>
#include <ranges>
#include <seqan3/core/detail/iterator_traits.hpp>
#include <seqan3/core/range/type_traits.hpp>
#include <seqan3/test/expect_range_eq.hpp>
#include <seqan3/utility/views/repeat_n.hpp>
TEST(general, construction)
{
// char
char chr{'A'};
auto v = seqan3::views::repeat_n(chr, 4);
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_n(chr_const, 20);
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_n(chr, 10);
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_TRUE((std::ranges::sized_range<decltype(v)>));
EXPECT_FALSE((std::ranges::common_range<decltype(v)>));
EXPECT_TRUE((std::ranges::output_range<decltype(v), char>));
}
TEST(view, factory)
{
// const char
{
char const chr{'X'};
auto v = seqan3::views::repeat_n(chr, 3);
EXPECT_EQ(v.size(), 3u);
EXPECT_RANGE_EQ(v, (std::vector<char>{chr, chr, chr}));
}
// string
{
std::string str{"foobar"};
auto v = seqan3::views::repeat_n(str, 2);
EXPECT_EQ(v.size(), 2u);
EXPECT_EQ(*v.begin(), str);
EXPECT_EQ(v[0], str);
}
// view
{
std::string str{"foobar"};
auto view = str | std::views::take(3);
auto v = seqan3::views::repeat_n(view, 5);
EXPECT_RANGE_EQ(*v.begin(), std::string{"foo"});
}
// combinability
{
std::string str{"foobar"};
auto v = seqan3::views::repeat_n(str, 2)
| std::views::transform(
[](auto & str)
{
return str.substr(3);
});
EXPECT_RANGE_EQ(v, (std::vector<std::string>{"bar", "bar"}));
}
}
constexpr char constexpr_view()
{
char chr{'A'};
auto v = seqan3::views::repeat_n(chr, 10);
v[0] = 'X';
return *v.begin();
}
TEST(general, constexpr_context)
{
constexpr char val = constexpr_view();
EXPECT_EQ(val, 'X');
}
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