76 lines
1.7 KiB
C++
76 lines
1.7 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/Slice.h"
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#include "td/utils/StringBuilder.h"
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#include "td/utils/tests.h"
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#include "td/utils/Variant.h"
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REGISTER_TESTS(variant);
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using namespace td;
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static const size_t BUF_SIZE = 1024 * 1024;
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static char buf[BUF_SIZE], buf2[BUF_SIZE];
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static StringBuilder sb(MutableSlice(buf, BUF_SIZE - 1));
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static StringBuilder sb2(MutableSlice(buf2, BUF_SIZE - 1));
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static std::string move_sb() {
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auto res = sb.as_cslice().str();
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sb.clear();
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return res;
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}
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static std::string name(int id) {
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if (id == 1) {
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return "A";
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}
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if (id == 2) {
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return "B";
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}
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if (id == 3) {
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return "C";
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}
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return "";
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}
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template <int id>
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class Class {
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public:
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Class() {
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sb << "+" << name(id);
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}
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Class(const Class &) = delete;
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Class &operator=(const Class &) = delete;
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Class(Class &&) = delete;
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Class &operator=(Class &&) = delete;
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~Class() {
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sb << "-" << name(id);
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}
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};
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using A = Class<1>;
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using B = Class<2>;
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using C = Class<3>;
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TEST(Variant, simple) {
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{
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Variant<std::unique_ptr<A>, std::unique_ptr<B>, std::unique_ptr<C>> abc;
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ASSERT_STREQ("", sb.as_cslice());
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abc = std::make_unique<A>();
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ASSERT_STREQ("+A", sb.as_cslice());
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sb.clear();
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abc = std::make_unique<B>();
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ASSERT_STREQ("+B-A", sb.as_cslice());
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sb.clear();
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abc = std::make_unique<C>();
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ASSERT_STREQ("+C-B", sb.as_cslice());
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sb.clear();
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}
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ASSERT_STREQ("-C", move_sb());
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sb.clear();
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};
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