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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ui/InputTransport.h>
#include <utils/Timers.h>
#include <utils/StopWatch.h>
#include <gtest/gtest.h>
#include <unistd.h>
#include <time.h>
#include <sys/mman.h>
#include <cutils/ashmem.h>
#include "../../utils/tests/TestHelpers.h"
namespace android {
class InputChannelTest : public testing::Test {
protected:
virtual void SetUp() { }
virtual void TearDown() { }
};
TEST_F(InputChannelTest, ConstructorAndDestructor_TakesOwnershipOfFileDescriptors) {
// Our purpose here is to verify that the input channel destructor closes the
// file descriptors provided to it. One easy way is to provide it with one end
// of a pipe and to check for EPIPE on the other end after the channel is destroyed.
Pipe fakeAshmem, sendPipe, receivePipe;
sp<InputChannel> inputChannel = new InputChannel(String8("channel name"),
fakeAshmem.sendFd, receivePipe.receiveFd, sendPipe.sendFd);
EXPECT_STREQ("channel name", inputChannel->getName().string())
<< "channel should have provided name";
EXPECT_EQ(fakeAshmem.sendFd, inputChannel->getAshmemFd())
<< "channel should have provided ashmem fd";
EXPECT_EQ(receivePipe.receiveFd, inputChannel->getReceivePipeFd())
<< "channel should have provided receive pipe fd";
EXPECT_EQ(sendPipe.sendFd, inputChannel->getSendPipeFd())
<< "channel should have provided send pipe fd";
inputChannel.clear(); // destroys input channel
EXPECT_EQ(-EPIPE, fakeAshmem.readSignal())
<< "channel should have closed ashmem fd when destroyed";
EXPECT_EQ(-EPIPE, receivePipe.writeSignal())
<< "channel should have closed receive pipe fd when destroyed";
EXPECT_EQ(-EPIPE, sendPipe.readSignal())
<< "channel should have closed send pipe fd when destroyed";
// clean up fds of Pipe endpoints that were closed so we don't try to close them again
fakeAshmem.sendFd = -1;
receivePipe.receiveFd = -1;
sendPipe.sendFd = -1;
}
TEST_F(InputChannelTest, OpenInputChannelPair_ReturnsAPairOfConnectedChannels) {
sp<InputChannel> serverChannel, clientChannel;
status_t result = InputChannel::openInputChannelPair(String8("channel name"),
serverChannel, clientChannel);
ASSERT_EQ(OK, result)
<< "should have successfully opened a channel pair";
// Name
EXPECT_STREQ("channel name (server)", serverChannel->getName().string())
<< "server channel should have suffixed name";
EXPECT_STREQ("channel name (client)", clientChannel->getName().string())
<< "client channel should have suffixed name";
// Ashmem uniqueness
EXPECT_NE(serverChannel->getAshmemFd(), clientChannel->getAshmemFd())
<< "server and client channel should have different ashmem fds because it was dup'd";
// Ashmem usability
ssize_t serverAshmemSize = ashmem_get_size_region(serverChannel->getAshmemFd());
ssize_t clientAshmemSize = ashmem_get_size_region(clientChannel->getAshmemFd());
uint32_t* serverAshmem = static_cast<uint32_t*>(mmap(NULL, serverAshmemSize,
PROT_READ | PROT_WRITE, MAP_SHARED, serverChannel->getAshmemFd(), 0));
uint32_t* clientAshmem = static_cast<uint32_t*>(mmap(NULL, clientAshmemSize,
PROT_READ | PROT_WRITE, MAP_SHARED, clientChannel->getAshmemFd(), 0));
ASSERT_TRUE(serverAshmem != NULL)
<< "server channel ashmem should be mappable";
ASSERT_TRUE(clientAshmem != NULL)
<< "client channel ashmem should be mappable";
*serverAshmem = 0xf00dd00d;
EXPECT_EQ(0xf00dd00d, *clientAshmem)
<< "ashmem buffer should be shared by client and server";
munmap(serverAshmem, serverAshmemSize);
munmap(clientAshmem, clientAshmemSize);
// Server->Client communication
EXPECT_EQ(OK, serverChannel->sendSignal('S'))
<< "server channel should be able to send signal to client channel";
char signal;
EXPECT_EQ(OK, clientChannel->receiveSignal(& signal))
<< "client channel should be able to receive signal from server channel";
EXPECT_EQ('S', signal)
<< "client channel should receive the correct signal from server channel";
// Client->Server communication
EXPECT_EQ(OK, clientChannel->sendSignal('c'))
<< "client channel should be able to send signal to server channel";
EXPECT_EQ(OK, serverChannel->receiveSignal(& signal))
<< "server channel should be able to receive signal from client channel";
EXPECT_EQ('c', signal)
<< "server channel should receive the correct signal from client channel";
}
TEST_F(InputChannelTest, ReceiveSignal_WhenNoSignalPresent_ReturnsAnError) {
sp<InputChannel> serverChannel, clientChannel;
status_t result = InputChannel::openInputChannelPair(String8("channel name"),
serverChannel, clientChannel);
ASSERT_EQ(OK, result)
<< "should have successfully opened a channel pair";
char signal;
EXPECT_EQ(WOULD_BLOCK, clientChannel->receiveSignal(& signal))
<< "receiveSignal should have returned WOULD_BLOCK";
}
TEST_F(InputChannelTest, ReceiveSignal_WhenPeerClosed_ReturnsAnError) {
sp<InputChannel> serverChannel, clientChannel;
status_t result = InputChannel::openInputChannelPair(String8("channel name"),
serverChannel, clientChannel);
ASSERT_EQ(OK, result)
<< "should have successfully opened a channel pair";
serverChannel.clear(); // close server channel
char signal;
EXPECT_EQ(DEAD_OBJECT, clientChannel->receiveSignal(& signal))
<< "receiveSignal should have returned DEAD_OBJECT";
}
TEST_F(InputChannelTest, SendSignal_WhenPeerClosed_ReturnsAnError) {
sp<InputChannel> serverChannel, clientChannel;
status_t result = InputChannel::openInputChannelPair(String8("channel name"),
serverChannel, clientChannel);
ASSERT_EQ(OK, result)
<< "should have successfully opened a channel pair";
serverChannel.clear(); // close server channel
EXPECT_EQ(DEAD_OBJECT, clientChannel->sendSignal('S'))
<< "sendSignal should have returned DEAD_OBJECT";
}
} // namespace android
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