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monero/tests/unit_tests/expect.cpp

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Copyright: Update to 2022
2022-03-01 06:16:17 -05:00
// Copyright (c) 2018-2022, The Monero Project
Adding expect<T> - a value-or-error implementation
2018-09-10 21:25:15 -04:00
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <gtest/gtest.h>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/utility/string_ref.hpp>
#include <string>
#include <system_error>
#include <type_traits>
#include "common/expect.h"
namespace
{
struct move_only;
struct throw_construct;
struct throw_copies;
struct throw_moves;
struct move_only
{
move_only() = default;
move_only(move_only const&) = delete;
move_only(move_only&&) = default;
~move_only() = default;
move_only& operator=(move_only const&) = delete;
move_only& operator=(move_only&&) = default;
};
struct throw_construct
{
throw_construct() {}
throw_construct(int) {}
throw_construct(throw_construct const&) = default;
throw_construct(throw_construct&&) = default;
~throw_construct() = default;
throw_construct& operator=(throw_construct const&) = default;
throw_construct& operator=(throw_construct&&) = default;
};
struct throw_copies
{
throw_copies() noexcept {}
throw_copies(throw_copies const&) {}
throw_copies(throw_copies&&) = default;
~throw_copies() = default;
throw_copies& operator=(throw_copies const&) { return *this; }
throw_copies& operator=(throw_copies&&) = default;
bool operator==(throw_copies const&) noexcept { return true; }
bool operator==(throw_moves const&) noexcept { return true; }
};
struct throw_moves
{
throw_moves() noexcept {}
throw_moves(throw_moves const&) = default;
throw_moves(throw_moves&&) {}
~throw_moves() = default;
throw_moves& operator=(throw_moves const&) = default;
throw_moves& operator=(throw_moves&&) { return *this; }
bool operator==(throw_moves const&) { return true; }
bool operator==(throw_copies const&) { return true; }
};
template<typename T>
void construction_bench()
{
EXPECT_TRUE(std::is_copy_constructible<expect<T>>());
EXPECT_TRUE(std::is_move_constructible<expect<T>>());
EXPECT_TRUE(std::is_copy_assignable<expect<T>>());
EXPECT_TRUE(std::is_move_assignable<expect<T>>());
EXPECT_TRUE(std::is_destructible<expect<T>>());
}
template<typename T>
void noexcept_bench()
{
EXPECT_TRUE(std::is_nothrow_copy_constructible<expect<T>>());
EXPECT_TRUE(std::is_nothrow_move_constructible<expect<T>>());
EXPECT_TRUE(std::is_nothrow_copy_assignable<expect<T>>());
EXPECT_TRUE(std::is_nothrow_move_assignable<expect<T>>());
EXPECT_TRUE(std::is_nothrow_destructible<expect<T>>());
EXPECT_TRUE(noexcept(bool(std::declval<expect<T>>())));
EXPECT_TRUE(noexcept(std::declval<expect<T>>().has_error()));
EXPECT_TRUE(noexcept(std::declval<expect<T>>().error()));
EXPECT_TRUE(noexcept(std::declval<expect<T>>().equal(std::declval<expect<T>>())));
EXPECT_TRUE(noexcept(std::declval<expect<T>>() == std::declval<expect<T>>()));
EXPECT_TRUE(noexcept(std::declval<expect<T>>() != std::declval<expect<T>>()));
}
template<typename T>
void conversion_bench()
{
EXPECT_TRUE((std::is_convertible<std::error_code, expect<T>>()));
EXPECT_TRUE((std::is_convertible<std::error_code&&, expect<T>>()));
EXPECT_TRUE((std::is_convertible<std::error_code&, expect<T>>()));
EXPECT_TRUE((std::is_convertible<std::error_code const&, expect<T>>()));
EXPECT_TRUE((std::is_constructible<expect<T>, std::error_code>()));
EXPECT_TRUE((std::is_constructible<expect<T>, std::error_code&&>()));
EXPECT_TRUE((std::is_constructible<expect<T>, std::error_code&>()));
EXPECT_TRUE((std::is_constructible<expect<T>, std::error_code const&>()));
}
}
TEST(Expect, Constructions)
{
construction_bench<void>();
construction_bench<int>();
EXPECT_TRUE(std::is_constructible<expect<void>>());
EXPECT_TRUE((std::is_constructible<expect<throw_construct>, expect<int>>()));
EXPECT_TRUE(std::is_move_constructible<expect<move_only>>());
EXPECT_TRUE(std::is_move_assignable<expect<move_only>>());
}
TEST(Expect, Conversions)
{
struct implicit { implicit(int) {} };
struct explicit_only { explicit explicit_only(int) {} };
conversion_bench<void>();
conversion_bench<int>();
EXPECT_TRUE((std::is_convertible<int, expect<int>>()));
EXPECT_TRUE((std::is_convertible<int&&, expect<int>>()));
EXPECT_TRUE((std::is_convertible<int&, expect<int>>()));
EXPECT_TRUE((std::is_convertible<int const, expect<int>>()));
EXPECT_TRUE((std::is_convertible<expect<unsigned>, expect<int>>()));
EXPECT_TRUE((std::is_convertible<expect<unsigned>&&, expect<int>>()));
EXPECT_TRUE((std::is_convertible<expect<unsigned>&, expect<int>>()));
EXPECT_TRUE((std::is_convertible<expect<unsigned> const&, expect<int>>()));
EXPECT_TRUE((std::is_convertible<expect<int>, expect<implicit>>()));
EXPECT_TRUE((std::is_convertible<expect<int>&&, expect<implicit>>()));
EXPECT_TRUE((std::is_convertible<expect<int>&, expect<implicit>>()));
EXPECT_TRUE((std::is_convertible<expect<int> const&, expect<implicit>>()));
EXPECT_TRUE(!(std::is_convertible<expect<int>, expect<explicit_only>>()));
EXPECT_TRUE(!(std::is_convertible<expect<int>&&, expect<explicit_only>>()));
EXPECT_TRUE(!(std::is_convertible<expect<int>&, expect<explicit_only>>()));
EXPECT_TRUE(!(std::is_convertible<expect<int> const&, expect<explicit_only>>()));
EXPECT_TRUE((std::is_constructible<expect<int>, int>()));
EXPECT_TRUE((std::is_constructible<expect<int>, int&&>()));
EXPECT_TRUE((std::is_constructible<expect<int>, int&>()));
EXPECT_TRUE((std::is_constructible<expect<int>, int const&>()));
EXPECT_TRUE((std::is_constructible<expect<int>, expect<unsigned>>()));
EXPECT_TRUE((std::is_constructible<expect<int>, expect<unsigned>&&>()));
EXPECT_TRUE((std::is_constructible<expect<int>, expect<unsigned>&>()));
EXPECT_TRUE((std::is_constructible<expect<int>, expect<unsigned> const&>()));
EXPECT_TRUE((std::is_constructible<expect<implicit>, expect<int>>()));
EXPECT_TRUE((std::is_constructible<expect<implicit>, expect<int>&&>()));
EXPECT_TRUE((std::is_constructible<expect<implicit>, expect<int>&>()));
EXPECT_TRUE((std::is_constructible<expect<implicit>, expect<int> const&>()));
EXPECT_TRUE(!(std::is_constructible<expect<explicit_only>, expect<int>>()));
EXPECT_TRUE(!(std::is_constructible<expect<explicit_only>, expect<int>&&>()));
EXPECT_TRUE(!(std::is_constructible<expect<explicit_only>, expect<int>&>()));
EXPECT_TRUE(!(std::is_constructible<expect<explicit_only>, expect<int> const&>()));
EXPECT_EQ(expect<int>{expect<short>{100}}.value(), 100);
expect<std::string> val1{std::string{}};
expect<const char*> val2{"foo"};
EXPECT_EQ(val1.value(), std::string{});
EXPECT_EQ(val2.value(), std::string{"foo"});
const expect<std::string> val3{val2};
EXPECT_EQ(val1.value(), std::string{});
EXPECT_EQ(val2.value(), std::string{"foo"});
EXPECT_EQ(val3.value(), std::string{"foo"});
val1 = val2;
EXPECT_EQ(val1.value(), "foo");
EXPECT_EQ(val2.value(), std::string{"foo"});
EXPECT_EQ(val3.value(), "foo");
}
TEST(Expect, NoExcept)
{
noexcept_bench<void>();
noexcept_bench<int>();
EXPECT_TRUE(std::is_nothrow_constructible<expect<void>>());
EXPECT_TRUE((std::is_nothrow_constructible<expect<int>, int>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<int>, expect<unsigned>>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<int>, expect<unsigned>&&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<int>, expect<unsigned>&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<int>, expect<unsigned> const&>()));
EXPECT_TRUE(noexcept(expect<int>{std::declval<expect<unsigned>&&>()}));
EXPECT_TRUE(noexcept(expect<int>{std::declval<expect<unsigned> const&>()}));
EXPECT_TRUE(noexcept(std::declval<expect<int>>().has_value()));
EXPECT_TRUE(noexcept(*std::declval<expect<int>>()));
EXPECT_TRUE(noexcept(std::declval<expect<int>>().equal(std::declval<expect<unsigned>>())));
EXPECT_TRUE(noexcept(std::declval<expect<unsigned>>().equal(std::declval<expect<int>>())));
EXPECT_TRUE(noexcept(std::declval<expect<int>>().equal(0)));
EXPECT_TRUE(noexcept(std::declval<expect<int>>() == std::declval<expect<unsigned>>()));
EXPECT_TRUE(noexcept(std::declval<expect<unsigned>>() == std::declval<expect<int>>()));
EXPECT_TRUE(noexcept(std::declval<expect<int>>() == 0));
EXPECT_TRUE(noexcept(0 == std::declval<expect<int>>()));
EXPECT_TRUE(noexcept(std::declval<expect<int>>() != std::declval<expect<unsigned>>()));
EXPECT_TRUE(noexcept(std::declval<expect<unsigned>>() != std::declval<expect<int>>()));
EXPECT_TRUE(noexcept(std::declval<expect<int>>() != 0));
EXPECT_TRUE(noexcept(0 != std::declval<expect<int>>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_construct>, std::error_code>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_construct>, std::error_code&&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_construct>, std::error_code&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_construct>, std::error_code const&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_construct>, throw_construct>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_construct>, throw_construct&&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_construct>, throw_construct&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_construct>, throw_construct const&>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_construct>, expect<int>>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_construct>, expect<int>&&>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_construct>, expect<int>&>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_construct>, expect<int> const&>()));
EXPECT_TRUE(std::is_nothrow_copy_constructible<expect<throw_construct>>());
EXPECT_TRUE(std::is_nothrow_move_constructible<expect<throw_construct>>());
EXPECT_TRUE(std::is_nothrow_copy_assignable<expect<throw_construct>>());
EXPECT_TRUE(std::is_nothrow_move_assignable<expect<throw_construct>>());
EXPECT_TRUE(std::is_nothrow_destructible<expect<throw_construct>>());
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_copies>, std::error_code>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_copies>, std::error_code&&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_copies>, std::error_code&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_copies>, std::error_code const&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_copies>, throw_copies>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_copies>, throw_copies&&>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_copies>, throw_copies&>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_copies>, throw_copies const&>()));
EXPECT_TRUE(!std::is_nothrow_copy_constructible<expect<throw_copies>>());
EXPECT_TRUE(std::is_nothrow_move_constructible<expect<throw_copies>>());
EXPECT_TRUE(!std::is_nothrow_copy_assignable<expect<throw_copies>>());
EXPECT_TRUE(std::is_nothrow_move_assignable<expect<throw_copies>>());
EXPECT_TRUE(std::is_nothrow_destructible<expect<throw_copies>>());
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>().equal(std::declval<expect<throw_copies>>())));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>().equal(std::declval<throw_copies>())));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>() == std::declval<expect<throw_copies>>()));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>() == std::declval<throw_copies>()));
EXPECT_TRUE(noexcept(std::declval<throw_copies>() == std::declval<expect<throw_copies>>()));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>() != std::declval<expect<throw_copies>>()));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>() != std::declval<throw_copies>()));
EXPECT_TRUE(noexcept(std::declval<throw_copies>() != std::declval<expect<throw_copies>>()));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>().equal(std::declval<expect<throw_moves>>())));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>().equal(std::declval<throw_moves>())));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>() == std::declval<expect<throw_moves>>()));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>() == std::declval<throw_moves>()));
EXPECT_TRUE(noexcept(std::declval<throw_moves>() == std::declval<expect<throw_copies>>()));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>() != std::declval<expect<throw_moves>>()));
EXPECT_TRUE(noexcept(std::declval<expect<throw_copies>>() != std::declval<throw_moves>()));
EXPECT_TRUE(noexcept(std::declval<throw_moves>() != std::declval<expect<throw_copies>>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_moves>, std::error_code>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_moves>, std::error_code&&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_moves>, std::error_code&>()));
EXPECT_TRUE((std::is_nothrow_constructible<expect<throw_moves>, std::error_code const&>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_moves>, throw_moves>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_moves>, throw_moves&&>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_moves>, throw_moves&>()));
EXPECT_TRUE(!(std::is_nothrow_constructible<expect<throw_moves>, throw_moves const&>()));
EXPECT_TRUE(std::is_nothrow_copy_constructible<expect<throw_moves>>());
EXPECT_TRUE(!std::is_nothrow_move_constructible<expect<throw_moves>>());
EXPECT_TRUE(std::is_nothrow_copy_assignable<expect<throw_moves>>());
EXPECT_TRUE(!std::is_nothrow_move_assignable<expect<throw_moves>>());
EXPECT_TRUE(std::is_nothrow_destructible<expect<throw_copies>>());
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>().equal(std::declval<expect<throw_moves>>())));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>().equal(std::declval<throw_moves>())));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>() == std::declval<expect<throw_moves>>()));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>() == std::declval<throw_moves>()));
EXPECT_TRUE(!noexcept(std::declval<throw_moves>() == std::declval<expect<throw_moves>>()));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>() != std::declval<expect<throw_moves>>()));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>() != std::declval<throw_moves>()));
EXPECT_TRUE(!noexcept(std::declval<throw_moves>() != std::declval<expect<throw_moves>>()));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>().equal(std::declval<expect<throw_copies>>())));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>().equal(std::declval<throw_copies>())));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>() == std::declval<expect<throw_copies>>()));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>() == std::declval<throw_copies>()));
EXPECT_TRUE(!noexcept(std::declval<throw_copies>() == std::declval<expect<throw_moves>>()));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>() != std::declval<expect<throw_copies>>()));
EXPECT_TRUE(!noexcept(std::declval<expect<throw_moves>>() != std::declval<throw_copies>()));
EXPECT_TRUE(!noexcept(std::declval<throw_copies>() != std::declval<expect<throw_moves>>()));
}
TEST(Expect, Trivial)
{
EXPECT_TRUE(std::is_trivially_copy_constructible<expect<void>>());
EXPECT_TRUE(std::is_trivially_move_constructible<expect<void>>());
EXPECT_TRUE(std::is_trivially_destructible<expect<void>>());
}
TEST(Expect, Assignment)
{
expect<std::string> val1{std::string{}};
expect<std::string> val2{"foobar"};
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_value());
EXPECT_TRUE(bool(val1));
EXPECT_TRUE(bool(val2));
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_error());
EXPECT_EQ(val1.value(), std::string{});
EXPECT_TRUE(*val1 == std::string{});
EXPECT_TRUE(boost::equals(val1->c_str(), ""));
EXPECT_TRUE(val2.value() == "foobar");
EXPECT_TRUE(*val2 == "foobar");
EXPECT_TRUE(boost::equals(val2->c_str(), "foobar"));
EXPECT_EQ(val1.error(), std::error_code{});
EXPECT_EQ(val2.error(), std::error_code{});
EXPECT_TRUE(!val1.equal(std::error_code{}));
EXPECT_TRUE(!val2.equal(std::error_code{}));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
val1 = std::move(val2);
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_value());
EXPECT_TRUE(bool(val1));
EXPECT_TRUE(bool(val2));
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_error());
EXPECT_EQ(val1.value(), "foobar");
EXPECT_TRUE(*val1 == "foobar");
EXPECT_TRUE(boost::equals(val1->c_str(), "foobar"));
EXPECT_EQ(val2.value(), std::string{});
EXPECT_TRUE(*val2 == std::string{});
EXPECT_TRUE(boost::equals(val2->c_str(), ""));
EXPECT_EQ(val1.error(), std::error_code{});
EXPECT_EQ(val2.error(), std::error_code{});
EXPECT_TRUE(!val1.equal(std::error_code{}));
EXPECT_TRUE(!val2.equal(std::error_code{}));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
val2 = val1;
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_value());
EXPECT_TRUE(bool(val1));
EXPECT_TRUE(bool(val2));
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_error());
EXPECT_EQ(val1.value(), "foobar");
EXPECT_TRUE(*val1 == "foobar");
EXPECT_TRUE(boost::equals(val1->c_str(), "foobar"));
EXPECT_EQ(val2.value(), "foobar");
EXPECT_TRUE(*val2 == "foobar");
EXPECT_TRUE(boost::equals(val2->c_str(), "foobar"));
EXPECT_EQ(val1.error(), std::error_code{});
EXPECT_EQ(val2.error(), std::error_code{});
EXPECT_TRUE(!val1.equal(std::error_code{}));
EXPECT_TRUE(!val2.equal(std::error_code{}));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
val1 = make_error_code(common_error::kInvalidArgument);
ASSERT_TRUE(val1.has_error());
ASSERT_TRUE(val2.has_value());
EXPECT_TRUE(!val1);
EXPECT_TRUE(bool(val2));
EXPECT_TRUE(!val1.has_value());
EXPECT_TRUE(!val2.has_error());
EXPECT_EQ(val1.error(), common_error::kInvalidArgument);
EXPECT_TRUE(val1 == common_error::kInvalidArgument);
EXPECT_TRUE(common_error::kInvalidArgument == val1);
EXPECT_STREQ(val2.value().c_str(), "foobar");
EXPECT_TRUE(*val2 == "foobar");
EXPECT_TRUE(boost::equals(val2->c_str(), "foobar"));
EXPECT_NE(val1.error(), std::error_code{});
EXPECT_EQ(val2.error(), std::error_code{});
EXPECT_TRUE(val1.equal(common_error::kInvalidArgument));
EXPECT_TRUE(!val2.equal(std::error_code{}));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
EXPECT_TRUE(val1.matches(std::errc::invalid_argument));
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
val2 = val1;
ASSERT_TRUE(val1.has_error());
ASSERT_TRUE(val2.has_error());
EXPECT_TRUE(!val1);
EXPECT_TRUE(!val2);
EXPECT_TRUE(!val1.has_value());
EXPECT_TRUE(!val2.has_value());
EXPECT_EQ(val1.error(), common_error::kInvalidArgument);
EXPECT_TRUE(val1 == common_error::kInvalidArgument);
EXPECT_TRUE(common_error::kInvalidArgument == val1);
EXPECT_EQ(val2.error(), common_error::kInvalidArgument);
EXPECT_TRUE(val2 == common_error::kInvalidArgument);
EXPECT_TRUE(common_error::kInvalidArgument == val2);
EXPECT_NE(val1.error(), std::error_code{});
EXPECT_NE(val2.error(), std::error_code{});
EXPECT_TRUE(val1.equal(common_error::kInvalidArgument));
EXPECT_TRUE(val2.equal(common_error::kInvalidArgument));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
EXPECT_TRUE(val1.matches(std::errc::invalid_argument));
EXPECT_TRUE(val2.matches(std::errc::invalid_argument));
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
val1 = std::string{"barfoo"};
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_error());
EXPECT_TRUE(bool(val1));
EXPECT_TRUE(!val2);
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_value());
EXPECT_STREQ(val1.value().c_str(), "barfoo");
EXPECT_TRUE(*val1 == "barfoo");
EXPECT_TRUE(boost::equals(val1->c_str(), "barfoo"));
EXPECT_EQ(val2.error(), common_error::kInvalidArgument);
EXPECT_TRUE(val2 == common_error::kInvalidArgument);
EXPECT_TRUE(common_error::kInvalidArgument == val2);
EXPECT_EQ(val1.error(), std::error_code{});
EXPECT_NE(val2.error(), std::error_code{});
EXPECT_TRUE(!val1.equal(std::error_code{}));
EXPECT_TRUE(val2.equal(common_error::kInvalidArgument));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
EXPECT_TRUE(val2.matches(std::errc::invalid_argument));
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
val2 = val1;
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_value());
EXPECT_TRUE(bool(val1));
EXPECT_TRUE(bool(val2));
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_error());
EXPECT_EQ(val1.value(), "barfoo");
EXPECT_TRUE(*val1 == "barfoo");
EXPECT_TRUE(boost::equals(val1->c_str(), "barfoo"));
EXPECT_EQ(val2.value(), "barfoo");
EXPECT_TRUE(*val2 == "barfoo");
EXPECT_TRUE(boost::equals(val2->c_str(), "barfoo"));
EXPECT_EQ(val1.error(), std::error_code{});
EXPECT_EQ(val2.error(), std::error_code{});
EXPECT_TRUE(!val1.equal(std::error_code{}));
EXPECT_TRUE(!val2.equal(std::error_code{}));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
}
TEST(Expect, AssignmentThrowsOnMove)
{
struct construct_error {};
struct assignment_error {};
struct throw_on_move {
std::string msg;
throw_on_move(const char* msg) : msg(msg) {}
throw_on_move(throw_on_move&&) {
throw construct_error{};
}
throw_on_move(throw_on_move const&) = default;
~throw_on_move() = default;
throw_on_move& operator=(throw_on_move&&) {
throw assignment_error{};
}
throw_on_move& operator=(throw_on_move const&) = default;
};
expect<throw_on_move> val1{expect<const char*>{"foobar"}};
expect<throw_on_move> val2{common_error::kInvalidArgument};
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_error());
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_value());
EXPECT_STREQ(val1->msg.c_str(), "foobar");
EXPECT_EQ(val2.error(), common_error::kInvalidArgument);
EXPECT_THROW(val2 = std::move(val1), construct_error);
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_error());
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_value());
EXPECT_STREQ(val1->msg.c_str(), "foobar");
EXPECT_EQ(val2.error(), common_error::kInvalidArgument);
EXPECT_THROW(val1 = expect<const char*>{"barfoo"}, assignment_error);
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_error());
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_value());
EXPECT_STREQ(val1->msg.c_str(), "foobar");
EXPECT_EQ(val2.error(), common_error::kInvalidArgument);
EXPECT_NO_THROW(val2 = val1);
ASSERT_TRUE(val1.has_value());
ASSERT_TRUE(val2.has_value());
EXPECT_TRUE(!val1.has_error());
EXPECT_TRUE(!val2.has_error());
EXPECT_STREQ(val1->msg.c_str(), "foobar");
EXPECT_STREQ(val2->msg.c_str(), "foobar");
}
TEST(Expect, EqualWithStrings)
{
expect<std::string> val1{std::string{}};
expect<std::string> val2{"barfoo"};
expect<boost::string_ref> val3{boost::string_ref{}};
EXPECT_TRUE(!val1.equal(val2));
EXPECT_TRUE(val1.equal(val3));
EXPECT_TRUE(!val2.equal(val1));
EXPECT_TRUE(!val2.equal(val3));
EXPECT_TRUE(val3.equal(val1));
EXPECT_TRUE(!val3.equal(val2));
EXPECT_TRUE(!(val1 == val2));
EXPECT_TRUE(!(val2 == val1));
EXPECT_TRUE(val1 == val3);
EXPECT_TRUE(val3 == val1);
EXPECT_TRUE(!(val2 == val3));
EXPECT_TRUE(!(val3 == val2));
EXPECT_TRUE(val1 != val2);
EXPECT_TRUE(val2 != val1);
EXPECT_TRUE(!(val1 != val3));
EXPECT_TRUE(!(val3 != val1));
EXPECT_TRUE(val2 != val3);
EXPECT_TRUE(val3 != val2);
EXPECT_TRUE(val1.equal(""));
EXPECT_TRUE(val2.equal("barfoo"));
EXPECT_TRUE(val3.equal(""));
EXPECT_TRUE(!val1.equal(std::error_code{}));
EXPECT_TRUE(!val2.equal(std::error_code{}));
EXPECT_TRUE(!val3.equal(std::error_code{}));
EXPECT_TRUE(val1 == "");
EXPECT_TRUE("" == val1);
EXPECT_TRUE(val2 == "barfoo");
EXPECT_TRUE("barfoo" == val2);
EXPECT_TRUE(val3 == "");
EXPECT_TRUE("" == val3);
EXPECT_TRUE(!(val1 != ""));
EXPECT_TRUE(!("" != val1));
EXPECT_TRUE(!(val2 != "barfoo"));
EXPECT_TRUE(!("barfoo" != val2));
EXPECT_TRUE(!(val3 != ""));
EXPECT_TRUE(!("" != val3));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(!(val3 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val3));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
EXPECT_TRUE(val3 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val3);
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
EXPECT_TRUE(!val3.matches(std::error_condition{}));
val2 = make_error_code(common_error::kInvalidArgument);
EXPECT_TRUE(!val1.equal(val2));
EXPECT_TRUE(val1.equal(val3));
EXPECT_TRUE(!val2.equal(val1));
EXPECT_TRUE(!val2.equal(val3));
EXPECT_TRUE(val3.equal(val1));
EXPECT_TRUE(!val3.equal(val2));
EXPECT_TRUE(!(val1 == val2));
EXPECT_TRUE(!(val2 == val1));
EXPECT_TRUE(val1 == val3);
EXPECT_TRUE(val3 == val1);
EXPECT_TRUE(!(val2 == val3));
EXPECT_TRUE(!(val3 == val2));
EXPECT_TRUE(val1 != val2);
EXPECT_TRUE(val2 != val1);
EXPECT_TRUE(!(val1 != val3));
EXPECT_TRUE(!(val3 != val1));
EXPECT_TRUE(val2 != val3);
EXPECT_TRUE(val3 != val2);
EXPECT_TRUE(!val1.equal(common_error::kInvalidArgument));
EXPECT_TRUE(val2.equal(common_error::kInvalidArgument));
EXPECT_TRUE(!val3.equal(common_error::kInvalidArgument));
EXPECT_TRUE(val2 == common_error::kInvalidArgument);
EXPECT_TRUE(common_error::kInvalidArgument == val2);
EXPECT_TRUE(!(val2 != common_error::kInvalidArgument));
EXPECT_TRUE(!(common_error::kInvalidArgument != val2));
EXPECT_TRUE(val2.matches(std::errc::invalid_argument));
EXPECT_TRUE(!val2.matches(std::error_condition{}));
val1 = expect<std::string>{"barfoo"};
EXPECT_TRUE(!val1.equal(val2));
EXPECT_TRUE(!val1.equal(val3));
EXPECT_TRUE(!val2.equal(val1));
EXPECT_TRUE(!val2.equal(val3));
EXPECT_TRUE(!val3.equal(val1));
EXPECT_TRUE(!val3.equal(val2));
EXPECT_TRUE(!(val1 == val2));
EXPECT_TRUE(!(val2 == val1));
EXPECT_TRUE(!(val1 == val3));
EXPECT_TRUE(!(val3 == val1));
EXPECT_TRUE(!(val2 == val3));
EXPECT_TRUE(!(val3 == val2));
EXPECT_TRUE(val1 != val2);
EXPECT_TRUE(val2 != val1);
EXPECT_TRUE(val1 != val3);
EXPECT_TRUE(val3 != val1);
EXPECT_TRUE(val2 != val3);
EXPECT_TRUE(val3 != val2);
EXPECT_TRUE(val1.equal("barfoo"));
EXPECT_TRUE(val1 == "barfoo");
EXPECT_TRUE("barfoo" == val1);
EXPECT_TRUE(!(val1 != "barfoo"));
EXPECT_TRUE(!("barfoo" != val1));
EXPECT_TRUE(!val1.equal(common_error::kInvalidArgument));
EXPECT_TRUE(!(val1 == common_error::kInvalidArgument));
EXPECT_TRUE(!(common_error::kInvalidArgument == val1));
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!val1.matches(std::error_condition{}));
EXPECT_TRUE(!val1.matches(std::errc::invalid_argument));
}
TEST(Expect, EqualWithVoid)
{
const expect<void> val1;
expect<void> val2;
EXPECT_TRUE(val1.equal(val2));
EXPECT_TRUE(val2.equal(val1));
EXPECT_TRUE(!val1.equal(std::error_code{}));
EXPECT_TRUE(!val2.equal(std::error_code{}));
EXPECT_TRUE(val1 == val2);
EXPECT_TRUE(val2 == val1);
EXPECT_TRUE(!(val1 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val1));
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(!(val1 != val2));
EXPECT_TRUE(!(val2 != val1));
EXPECT_TRUE(val1 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val1);
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
val2 = make_error_code(common_error::kInvalidArgument);
EXPECT_TRUE(!val1.equal(val2));
EXPECT_TRUE(!val2.equal(val1));
EXPECT_TRUE(!val1.equal(common_error::kInvalidArgument));
EXPECT_TRUE(val2.equal(common_error::kInvalidArgument));
EXPECT_TRUE(!val2.equal(std::error_code{}));
EXPECT_TRUE(!(val1 == val2));
EXPECT_TRUE(!(val2 == val1));
EXPECT_TRUE(val2 == common_error::kInvalidArgument);
EXPECT_TRUE(common_error::kInvalidArgument == val2);
EXPECT_TRUE(!(val2 == std::error_code{}));
EXPECT_TRUE(!(std::error_code{} == val2));
EXPECT_TRUE(val1 != val2);
EXPECT_TRUE(val2 != val1);
EXPECT_TRUE(!(val2 != common_error::kInvalidArgument));
EXPECT_TRUE(!(common_error::kInvalidArgument != val2));
EXPECT_TRUE(val2 != std::error_code{});
EXPECT_TRUE(std::error_code{} != val2);
}
TEST(Expect, EqualNoCopies)
{
struct copy_error {};
struct throw_on_copy {
throw_on_copy() = default;
throw_on_copy(int) noexcept {}
throw_on_copy(throw_on_copy const&) {
throw copy_error{};
}
~throw_on_copy() = default;
throw_on_copy& operator=(throw_on_copy const&) {
throw copy_error{};
}
bool operator==(throw_on_copy const&) const noexcept { return true; }
};
expect<throw_on_copy> val1{expect<int>{0}};
expect<throw_on_copy> val2{expect<int>{0}};
EXPECT_TRUE(val1.equal(val2));
EXPECT_TRUE(val2.equal(val1));
EXPECT_TRUE(val1 == val2);
EXPECT_TRUE(val2 == val1);
EXPECT_TRUE(!(val1 != val2));
EXPECT_TRUE(!(val2 != val1));
EXPECT_TRUE(val1.equal(throw_on_copy{}));
EXPECT_TRUE(val1 == throw_on_copy{});
EXPECT_TRUE(throw_on_copy{} == val1);
EXPECT_TRUE(!(val1 != throw_on_copy{}));
EXPECT_TRUE(!(throw_on_copy{} != val1));
throw_on_copy val3;
EXPECT_TRUE(val1.equal(val3));
EXPECT_TRUE(val1 == val3);
EXPECT_TRUE(val3 == val1);
EXPECT_TRUE(!(val1 != val3));
EXPECT_TRUE(!(val3 != val1));
expect<throw_on_copy> val4{common_error::kInvalidArgument};
EXPECT_TRUE(!val4.equal(throw_on_copy{}));
EXPECT_TRUE(!(val4 == throw_on_copy{}));
EXPECT_TRUE(!(throw_on_copy{} == val4));
EXPECT_TRUE(val4 != throw_on_copy{});
EXPECT_TRUE(throw_on_copy{} != val4);
EXPECT_TRUE(!val4.equal(val3));
EXPECT_TRUE(!(val4 == val3));
EXPECT_TRUE(!(val3 == val4));
EXPECT_TRUE(val4 != val3);
EXPECT_TRUE(val3 != val4);
}
TEST(Expect, Macros) {
EXPECT_TRUE(
[] () -> ::common_error {
MONERO_PRECOND(true);
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidErrorCode
);
EXPECT_TRUE(
[] () -> ::common_error {
MONERO_PRECOND(false);
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidArgument
);
EXPECT_TRUE(
[] () -> std::error_code {
MONERO_PRECOND(true);
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidErrorCode
);
EXPECT_TRUE(
[] () -> std::error_code {
MONERO_PRECOND(false);
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidArgument
);
EXPECT_TRUE(
[] () -> expect<void> {
MONERO_PRECOND(true);
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidErrorCode
);
EXPECT_TRUE(
[] () -> expect<void> {
MONERO_PRECOND(false);
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidArgument
);
EXPECT_TRUE(
[] () -> expect<int> {
MONERO_PRECOND(true);
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidErrorCode
);
EXPECT_TRUE(
[] () -> expect<int> {
MONERO_PRECOND(false);
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidArgument
);
EXPECT_TRUE(
[] () -> std::error_code {
MONERO_CHECK(expect<void>{});
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidErrorCode
);
EXPECT_TRUE(
[] () -> std::error_code {
MONERO_CHECK(expect<void>{common_error::kInvalidArgument});
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidArgument
);
EXPECT_TRUE(
[] () -> expect<void> {
MONERO_CHECK(expect<void>{});
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidErrorCode
);
EXPECT_TRUE(
[] () -> expect<void> {
MONERO_CHECK(expect<void>{common_error::kInvalidArgument});
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidArgument
);
EXPECT_TRUE(
[] () -> expect<int> {
MONERO_CHECK(expect<void>{});
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidErrorCode
);
EXPECT_TRUE(
[] () -> expect<int> {
MONERO_CHECK(expect<void>{common_error::kInvalidArgument});
return {common_error::kInvalidErrorCode};
} () == common_error::kInvalidArgument
);
EXPECT_NO_THROW(MONERO_UNWRAP(success()));
EXPECT_NO_THROW(MONERO_UNWRAP(expect<void>{}));
EXPECT_NO_THROW(MONERO_UNWRAP(expect<int>{0}));
EXPECT_THROW(
MONERO_UNWRAP(expect<void>{common_error::kInvalidArgument}), std::system_error
);
EXPECT_THROW(
MONERO_UNWRAP(expect<int>{common_error::kInvalidArgument}), std::system_error
);
}
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