86 lines
2 KiB
C++
86 lines
2 KiB
C++
#include <gtest/gtest.h>
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#include <m5_utility/stl/expected.hpp>
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TEST(Expected, Assignment)
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{
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m5::stl::expected<int, int> e1 = 42;
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m5::stl::expected<int, int> e2 = 17;
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m5::stl::expected<int, int> e3 = 21;
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m5::stl::expected<int, int> e4 = m5::stl::make_unexpected(42);
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m5::stl::expected<int, int> e5 = m5::stl::make_unexpected(17);
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m5::stl::expected<int, int> e6 = m5::stl::make_unexpected(21);
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e1 = e2;
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EXPECT_TRUE(e1);
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EXPECT_TRUE(*e1 == 17);
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EXPECT_TRUE(e2);
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EXPECT_TRUE(*e2 == 17);
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e1 = std::move(e2);
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EXPECT_TRUE(e1);
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EXPECT_TRUE(*e1 == 17);
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EXPECT_TRUE(e2);
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EXPECT_TRUE(*e2 == 17);
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e1 = 42;
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EXPECT_TRUE(e1);
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EXPECT_TRUE(*e1 == 42);
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auto unex = m5::stl::make_unexpected(12);
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e1 = unex;
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EXPECT_TRUE(!e1);
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EXPECT_TRUE(e1.error() == 12);
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e1 = m5::stl::make_unexpected(42);
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EXPECT_TRUE(!e1);
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EXPECT_TRUE(e1.error() == 42);
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e1 = e3;
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EXPECT_TRUE(e1);
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EXPECT_TRUE(*e1 == 21);
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e4 = e5;
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EXPECT_TRUE(!e4);
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EXPECT_TRUE(e4.error() == 17);
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e4 = std::move(e6);
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EXPECT_TRUE(!e4);
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EXPECT_TRUE(e4.error() == 21);
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e4 = e1;
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EXPECT_TRUE(e4);
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EXPECT_TRUE(*e4 == 21);
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}
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TEST(Expected, AssignmentDeletion)
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{
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struct has_all {
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has_all() = default;
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has_all(const has_all &) = default;
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has_all(has_all &&) noexcept = default;
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has_all &operator=(const has_all &) = default;
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};
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m5::stl::expected<has_all, has_all> e1 = {};
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m5::stl::expected<has_all, has_all> e2 = {};
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e1 = e2;
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struct except_move {
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except_move() = default;
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except_move(const except_move &) = default;
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except_move(except_move &&) noexcept(false)
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{
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}
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except_move &operator=(const except_move &) = default;
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};
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// m5::stl::expected<except_move, except_move> e3 = {};
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// m5::stl::expected<except_move, except_move> e4 = {};
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// e3 = e4; //should not compile
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}
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