54 lines
1.1 KiB
Text
54 lines
1.1 KiB
Text
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//
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// immer: immutable data structures for C++
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// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
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//
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// This software is distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
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//
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#ifndef ATOM_T
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#error "define the box template to use in ATOM_T"
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#endif
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#include <catch.hpp>
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template <typename T>
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using BOX_T = typename ATOM_T<T>::box_type;
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TEST_CASE("construction") { ATOM_T<int> x; }
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TEST_CASE("store, load, exchange")
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{
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ATOM_T<int> x;
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CHECK(x.load() == BOX_T<int>{0});
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x.store(42);
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CHECK(x.load() == BOX_T<int>{42});
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auto old = x.exchange(12);
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CHECK(old == 42);
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CHECK(x.load() == BOX_T<int>{12});
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}
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TEST_CASE("box conversion")
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{
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ATOM_T<int> x;
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auto v1 = BOX_T<int>{42};
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x = v1;
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auto v2 = BOX_T<int>{x};
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CHECK(v1 == v2);
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}
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TEST_CASE("value conversion")
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{
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ATOM_T<int> x;
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x = 42;
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auto v = int{x};
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CHECK(v == 42);
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}
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TEST_CASE("update")
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{
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ATOM_T<int> x{42};
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x.update([](auto x) { return x + 2; });
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CHECK(x.load() == 44);
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}
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