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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 <iostream>
#include <gtest/gtest.h>
#include <range/v3/algorithm/copy.hpp>
#include <range/v3/view/unique.hpp>
#include <seqan3/range/views/single_pass_input.hpp>
#include <seqan3/range/views/take_line.hpp>
#include <seqan3/range/views/to.hpp>
#include <seqan3/std/ranges>
// ============================================================================
// test templates
// ============================================================================
template <typename adaptor_t>
void do_test(adaptor_t const & adaptor, std::string const & vec)
{
// pipe notation
auto v = vec | adaptor;
EXPECT_EQ("foo", v | seqan3::views::to<std::string>);
// function notation
std::string v2(adaptor(vec) | seqan3::views::to<std::string>);
EXPECT_EQ("foo", v2);
// combinability
auto v3 = vec | adaptor | ranges::views::unique;
EXPECT_EQ("fo", v3 | seqan3::views::to<std::string>);
std::string v3b = vec | std::views::reverse | adaptor | ranges::views::unique | seqan3::views::to<std::string>;
EXPECT_EQ("rab", v3b);
// consuming behaviour
auto v4 = vec | seqan3::views::single_pass_input;
auto v5 = std::move(v4) | adaptor;
EXPECT_EQ("foo", v5 | seqan3::views::to<std::string>);
EXPECT_EQ('b', *begin(v5)); // not newline
}
template <typename adaptor_t>
void do_concepts(adaptor_t const & adaptor)
{
std::string vec{"foo\nbar"};
EXPECT_TRUE(std::ranges::input_range<decltype(vec)>);
EXPECT_TRUE(std::ranges::forward_range<decltype(vec)>);
EXPECT_TRUE(std::ranges::bidirectional_range<decltype(vec)>);
EXPECT_TRUE(std::ranges::random_access_range<decltype(vec)>);
EXPECT_FALSE(std::ranges::view<decltype(vec)>);
EXPECT_TRUE(std::ranges::sized_range<decltype(vec)>);
EXPECT_TRUE(std::ranges::common_range<decltype(vec)>);
EXPECT_TRUE(seqan3::const_iterable_range<decltype(vec)>);
EXPECT_TRUE((std::ranges::output_range<decltype(vec), char>));
auto v1 = vec | adaptor;
EXPECT_TRUE(std::ranges::input_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::forward_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::bidirectional_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::random_access_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::view<decltype(v1)>);
EXPECT_FALSE(std::ranges::sized_range<decltype(v1)>);
EXPECT_FALSE(std::ranges::common_range<decltype(v1)>);
EXPECT_TRUE(seqan3::const_iterable_range<decltype(v1)>);
EXPECT_TRUE((std::ranges::output_range<decltype(v1), char>));
auto v2 = vec | seqan3::views::single_pass_input | adaptor;
EXPECT_TRUE(std::ranges::input_range<decltype(v2)>);
EXPECT_FALSE(std::ranges::forward_range<decltype(v2)>);
EXPECT_FALSE(std::ranges::bidirectional_range<decltype(v2)>);
EXPECT_FALSE(std::ranges::random_access_range<decltype(v2)>);
EXPECT_TRUE(std::ranges::view<decltype(v2)>);
EXPECT_FALSE(std::ranges::sized_range<decltype(v2)>);
EXPECT_FALSE(std::ranges::common_range<decltype(v2)>);
EXPECT_FALSE(seqan3::const_iterable_range<decltype(v2)>);
EXPECT_TRUE((std::ranges::output_range<decltype(v2), char>));
}
// ============================================================================
// view_take_line
// ============================================================================
TEST(view_take_line, unix_eol)
{
do_test(seqan3::views::take_line, "foo\nbar");
}
TEST(view_take_line, windows_eol)
{
do_test(seqan3::views::take_line, "foo\r\nbar");
}
TEST(view_take_line, no_eol)
{
std::string vec{"foo"};
std::string v;
EXPECT_NO_THROW(( v = vec | seqan3::views::take_line | seqan3::views::to<std::string>));
EXPECT_EQ("foo", v);
}
TEST(view_take_line, eol_at_first_position)
{
using sbt = std::istreambuf_iterator<char>;
std::istringstream vec{"\n\nfoo"};
auto stream_view = std::ranges::subrange<decltype(sbt{vec}), decltype(sbt{})> {sbt{vec}, sbt{}};
EXPECT_EQ("", stream_view | seqan3::views::take_line | seqan3::views::to<std::string>);
EXPECT_EQ("foo", stream_view | seqan3::views::take_line | seqan3::views::to<std::string>);
}
TEST(view_take_line, concepts)
{
do_concepts(seqan3::views::take_line);
}
// ============================================================================
// view_take_line_or_throw
// ============================================================================
TEST(view_take_line_or_throw, unix_eol)
{
do_test(seqan3::views::take_line_or_throw, "foo\nbar");
}
TEST(view_take_line_or_throw, windows_eol)
{
do_test(seqan3::views::take_line_or_throw, "foo\r\nbar");
}
TEST(view_take_line_or_throw, no_eol)
{
std::string vec{"foo"};
EXPECT_THROW(std::string v = vec | seqan3::views::take_line_or_throw | seqan3::views::to<std::string>,
seqan3::unexpected_end_of_input);
}
TEST(view_take_line_or_throw, concepts)
{
do_concepts(seqan3::views::take_line_or_throw);
}
// ============================================================================
// bug
// ============================================================================
TEST(view_take_line, reverse_bug)
{
std::string vec{"foo\nbar"};
auto v1 = vec | seqan3::views::take_line;
EXPECT_EQ("foo", v1 | seqan3::views::to<std::string>);
EXPECT_TRUE(std::ranges::input_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::forward_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::bidirectional_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::random_access_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::view<decltype(v1)>);
EXPECT_FALSE(std::ranges::sized_range<decltype(v1)>);
EXPECT_FALSE(std::ranges::common_range<decltype(v1)>);
EXPECT_TRUE(seqan3::const_iterable_range<decltype(v1)>);
EXPECT_TRUE((std::ranges::output_range<decltype(v1), char>));
// No build failure, but wrong results:
// auto v2 = v1 | std::views::reverse;
// EXPECT_EQ("oof", std::string(v2));
}
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