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// Copyright (c) 2012 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 "remoting/base/typed_buffer.h"
#include <utility>
#include "testing/gtest/include/gtest/gtest.h"
namespace remoting {
namespace {
struct Data {
// A variable size vector.
int data[1];
};
} // namespace
// Check that the default constructor does not allocate the buffer.
TEST(TypedBufferTest, Empty) {
TypedBuffer<Data> buffer;
EXPECT_FALSE(buffer.get());
EXPECT_FALSE(buffer);
EXPECT_EQ(buffer.length(), 0u);
}
// Check that allocating zero-size structure does not allocate the buffer.
TEST(TypedBufferTest, ZeroSize) {
TypedBuffer<Data> buffer(0);
EXPECT_FALSE(buffer.get());
EXPECT_FALSE(buffer);
EXPECT_EQ(buffer.length(), 0u);
}
// Test creation of a buffer and verify that the buffer accessors work.
TEST(TypedBufferTest, Basic) {
TypedBuffer<Data> buffer(sizeof(int) * 10);
EXPECT_TRUE(buffer.get());
EXPECT_TRUE(buffer);
EXPECT_EQ(buffer.length(), sizeof(int) * 10);
// Make sure that operator*() syntax works.
(*buffer).data[9] = 0x12345678;
// Make sure that operator->() syntax works.
EXPECT_EQ(buffer->data[9], 0x12345678);
}
// Test passing ownership.
TEST(TypedBufferTest, Pass) {
TypedBuffer<Data> left;
TypedBuffer<Data> right(sizeof(int));
EXPECT_FALSE(left.get());
EXPECT_EQ(left.length(), 0u);
EXPECT_TRUE(right.get());
EXPECT_EQ(right.length(), sizeof(int));
Data* raw_ptr = right.get();
left = std::move(right);
// Verify that passing ownership transfers both the buffer pointer and its
// length.
EXPECT_EQ(left.get(), raw_ptr);
EXPECT_EQ(left.length(), sizeof(int));
// Verify that the original object was cleared.
EXPECT_FALSE(right.get());
EXPECT_EQ(right.length(), 0u);
}
// Test swapping ownership.
TEST(TypedBufferTest, Swap) {
TypedBuffer<Data> left(sizeof(int));
TypedBuffer<Data> right(sizeof(int) * 2);
EXPECT_TRUE(left.get());
EXPECT_EQ(left.length(), sizeof(int));
EXPECT_TRUE(right.get());
EXPECT_EQ(right.length(), sizeof(int) * 2);
Data* raw_left = left.get();
Data* raw_right = right.get();
left.Swap(right);
// Verify that swapping simply exchange contents of two objects.
// length.
EXPECT_EQ(left.get(), raw_right);
EXPECT_EQ(left.length(), sizeof(int) * 2);
EXPECT_EQ(right.get(), raw_left);
EXPECT_EQ(right.length(), sizeof(int));
}
TEST(TypedBufferTest, GetAtOffset) {
TypedBuffer<Data> buffer(sizeof(int) * 10);
EXPECT_EQ(buffer.get(), buffer.GetAtOffset(0));
EXPECT_EQ(reinterpret_cast<Data*>(&buffer->data[9]),
buffer.GetAtOffset(sizeof(int) * 9));
}
} // namespace remoting
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