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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "wtf/Optional.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace WTF {
namespace {
struct IntBox {
IntBox(int n) : number(n) { }
int number;
};
class DestructionNotifier {
public:
DestructionNotifier(bool& flag) : m_flag(flag) { }
~DestructionNotifier() { m_flag = true; }
private:
bool& m_flag;
};
TEST(OptionalTest, BooleanTest)
{
Optional<int> optional;
EXPECT_FALSE(optional);
optional.emplace(0);
EXPECT_TRUE(optional);
}
TEST(OptionalTest, Dereference)
{
Optional<int> optional;
optional.emplace(1);
EXPECT_EQ(1, *optional);
Optional<IntBox> optionalIntbox;
optionalIntbox.emplace(42);
EXPECT_EQ(42, optionalIntbox->number);
}
TEST(OptionalTest, DestructorCalled)
{
// Destroying a disengaged optional shouldn't do anything.
{
Optional<DestructionNotifier> optional;
}
// Destroying an engaged optional should call the destructor.
bool isDestroyed = false;
{
Optional<DestructionNotifier> optional;
optional.emplace(isDestroyed);
EXPECT_FALSE(isDestroyed);
}
EXPECT_TRUE(isDestroyed);
}
} // namespace
} // namespace WTF
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