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// Copyright 2014 The Chromium OS 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 <string>
#include <brillo/any.h>
#include <gtest/gtest.h>
using brillo::internal_details::Buffer;
TEST(Buffer, Empty) {
Buffer buffer;
EXPECT_TRUE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kExternal, buffer.storage_);
EXPECT_EQ(nullptr, buffer.GetDataPtr());
}
TEST(Buffer, Store_Int) {
Buffer buffer;
buffer.Assign(2);
EXPECT_FALSE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kContained, buffer.storage_);
EXPECT_STREQ(typeid(int).name(), buffer.GetDataPtr()->GetTypeName());
}
TEST(Buffer, Store_Double) {
Buffer buffer;
buffer.Assign(2.3);
EXPECT_FALSE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kContained, buffer.storage_);
EXPECT_STREQ(typeid(double).name(), buffer.GetDataPtr()->GetTypeName());
}
TEST(Buffer, Store_Pointers) {
Buffer buffer;
// nullptr
buffer.Assign(nullptr);
EXPECT_FALSE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kContained, buffer.storage_);
EXPECT_STREQ(typeid(std::nullptr_t).name(),
buffer.GetDataPtr()->GetTypeName());
// char *
buffer.Assign("abcd");
EXPECT_FALSE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kContained, buffer.storage_);
EXPECT_STREQ(typeid(const char*).name(), buffer.GetDataPtr()->GetTypeName());
// pointer to non-trivial object
class NonTrivial {
public:
virtual ~NonTrivial() {}
} non_trivial;
buffer.Assign(&non_trivial);
EXPECT_FALSE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kContained, buffer.storage_);
EXPECT_STREQ(typeid(NonTrivial*).name(), buffer.GetDataPtr()->GetTypeName());
}
TEST(Buffer, Store_NonTrivialObjects) {
class NonTrivial {
public:
virtual ~NonTrivial() {}
} non_trivial;
Buffer buffer;
buffer.Assign(non_trivial);
EXPECT_FALSE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kExternal, buffer.storage_);
EXPECT_STREQ(typeid(NonTrivial).name(), buffer.GetDataPtr()->GetTypeName());
}
TEST(Buffer, Store_Objects) {
Buffer buffer;
struct Small {
double d;
} small = {};
buffer.Assign(small);
EXPECT_FALSE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kContained, buffer.storage_);
EXPECT_STREQ(typeid(Small).name(), buffer.GetDataPtr()->GetTypeName());
struct Large {
char c[20];
} large = {};
buffer.Assign(large);
EXPECT_FALSE(buffer.IsEmpty());
EXPECT_EQ(Buffer::kExternal, buffer.storage_);
EXPECT_STREQ(typeid(Large).name(), buffer.GetDataPtr()->GetTypeName());
}
TEST(Buffer, Copy) {
Buffer buffer1;
Buffer buffer2;
buffer1.Assign(30);
buffer1.CopyTo(&buffer2);
EXPECT_FALSE(buffer1.IsEmpty());
EXPECT_FALSE(buffer2.IsEmpty());
EXPECT_STREQ(typeid(int).name(), buffer1.GetDataPtr()->GetTypeName());
EXPECT_STREQ(typeid(int).name(), buffer2.GetDataPtr()->GetTypeName());
EXPECT_EQ(30, buffer1.GetData<int>());
EXPECT_EQ(30, buffer2.GetData<int>());
buffer1.Assign(std::string("abc"));
buffer1.CopyTo(&buffer2);
EXPECT_FALSE(buffer1.IsEmpty());
EXPECT_FALSE(buffer2.IsEmpty());
EXPECT_STREQ(typeid(std::string).name(), buffer1.GetDataPtr()->GetTypeName());
EXPECT_STREQ(typeid(std::string).name(), buffer2.GetDataPtr()->GetTypeName());
EXPECT_EQ("abc", buffer1.GetData<std::string>());
EXPECT_EQ("abc", buffer2.GetData<std::string>());
}
TEST(Buffer, Move) {
// Move operations essentially leave the source object in a state that is
// guaranteed to be safe for reuse or destruction. There is no other explicit
// guarantees on the exact state of the source after move (e.g. that the
// source Any will be Empty after the move is complete).
Buffer buffer1;
Buffer buffer2;
buffer1.Assign(30);
buffer1.MoveTo(&buffer2);
// Contained types aren't flushed, so the source Any doesn't become empty.
// The contained value is just moved, but for scalars this just copies
// the data and any retains the actual type.
EXPECT_FALSE(buffer1.IsEmpty());
EXPECT_FALSE(buffer2.IsEmpty());
EXPECT_STREQ(typeid(int).name(), buffer2.GetDataPtr()->GetTypeName());
EXPECT_EQ(30, buffer2.GetData<int>());
buffer1.Assign(std::string("abc"));
buffer1.MoveTo(&buffer2);
// External types are moved by just moving the pointer value from src to dest.
// This will make the source object effectively "Empty".
EXPECT_TRUE(buffer1.IsEmpty());
EXPECT_FALSE(buffer2.IsEmpty());
EXPECT_STREQ(typeid(std::string).name(), buffer2.GetDataPtr()->GetTypeName());
EXPECT_EQ("abc", buffer2.GetData<std::string>());
}
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