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//
// Copyright 2010 The Android Open Source Project
//
#include <utils/Looper.h>
#include <utils/Timers.h>
#include <utils/StopWatch.h>
#include <gtest/gtest.h>
#include <unistd.h>
#include <time.h>
#include "TestHelpers.h"
// # of milliseconds to fudge stopwatch measurements
#define TIMING_TOLERANCE_MS 25
namespace android {
enum {
MSG_TEST1 = 1,
MSG_TEST2 = 2,
MSG_TEST3 = 3,
MSG_TEST4 = 4,
};
class DelayedWake : public DelayedTask {
sp<Looper> mLooper;
public:
DelayedWake(int delayMillis, const sp<Looper> looper) :
DelayedTask(delayMillis), mLooper(looper) {
}
protected:
virtual void doTask() {
mLooper->wake();
}
};
class DelayedWriteSignal : public DelayedTask {
Pipe* mPipe;
public:
DelayedWriteSignal(int delayMillis, Pipe* pipe) :
DelayedTask(delayMillis), mPipe(pipe) {
}
protected:
virtual void doTask() {
mPipe->writeSignal();
}
};
class CallbackHandler {
public:
void setCallback(const sp<Looper>& looper, int fd, int events) {
looper->addFd(fd, 0, events, staticHandler, this);
}
protected:
virtual ~CallbackHandler() { }
virtual int handler(int fd, int events) = 0;
private:
static int staticHandler(int fd, int events, void* data) {
return static_cast<CallbackHandler*>(data)->handler(fd, events);
}
};
class StubCallbackHandler : public CallbackHandler {
public:
int nextResult;
int callbackCount;
int fd;
int events;
explicit StubCallbackHandler(int nextResult) : nextResult(nextResult),
callbackCount(0), fd(-1), events(-1) {
}
protected:
virtual int handler(int fd, int events) {
callbackCount += 1;
this->fd = fd;
this->events = events;
return nextResult;
}
};
class StubMessageHandler : public MessageHandler {
public:
Vector<Message> messages;
virtual void handleMessage(const Message& message) {
messages.push(message);
}
};
class LooperTest : public testing::Test {
protected:
sp<Looper> mLooper;
virtual void SetUp() {
mLooper = new Looper(true);
}
virtual void TearDown() {
mLooper.clear();
}
};
TEST_F(LooperTest, PollOnce_WhenNonZeroTimeoutAndNotAwoken_WaitsForTimeout) {
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. equal timeout";
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be LOOPER_POLL_TIMEOUT";
}
TEST_F(LooperTest, PollOnce_WhenNonZeroTimeoutAndAwokenBeforeWaiting_ImmediatelyReturns) {
mLooper->wake();
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(1000);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because wake() was called before waiting";
EXPECT_EQ(Looper::POLL_WAKE, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because loop was awoken";
}
TEST_F(LooperTest, PollOnce_WhenNonZeroTimeoutAndAwokenWhileWaiting_PromptlyReturns) {
sp<DelayedWake> delayedWake = new DelayedWake(100, mLooper);
delayedWake->run("LooperTest");
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(1000);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. equal wake delay";
EXPECT_EQ(Looper::POLL_WAKE, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because loop was awoken";
}
TEST_F(LooperTest, PollOnce_WhenZeroTimeoutAndNoRegisteredFDs_ImmediatelyReturns) {
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(0);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should be approx. zero";
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT";
}
TEST_F(LooperTest, PollOnce_WhenZeroTimeoutAndNoSignalledFDs_ImmediatelyReturns) {
Pipe pipe;
StubCallbackHandler handler(true);
handler.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(0);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should be approx. zero";
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT";
EXPECT_EQ(0, handler.callbackCount)
<< "callback should not have been invoked because FD was not signalled";
}
TEST_F(LooperTest, PollOnce_WhenZeroTimeoutAndSignalledFD_ImmediatelyInvokesCallbackAndReturns) {
Pipe pipe;
StubCallbackHandler handler(true);
ASSERT_EQ(OK, pipe.writeSignal());
handler.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(0);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should be approx. zero";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because FD was signalled";
EXPECT_EQ(1, handler.callbackCount)
<< "callback should be invoked exactly once";
EXPECT_EQ(pipe.receiveFd, handler.fd)
<< "callback should have received pipe fd as parameter";
EXPECT_EQ(Looper::EVENT_INPUT, handler.events)
<< "callback should have received Looper::EVENT_INPUT as events";
}
TEST_F(LooperTest, PollOnce_WhenNonZeroTimeoutAndNoSignalledFDs_WaitsForTimeoutAndReturns) {
Pipe pipe;
StubCallbackHandler handler(true);
handler.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. equal timeout";
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT";
EXPECT_EQ(0, handler.callbackCount)
<< "callback should not have been invoked because FD was not signalled";
}
TEST_F(LooperTest, PollOnce_WhenNonZeroTimeoutAndSignalledFDBeforeWaiting_ImmediatelyInvokesCallbackAndReturns) {
Pipe pipe;
StubCallbackHandler handler(true);
pipe.writeSignal();
handler.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
ASSERT_EQ(OK, pipe.readSignal())
<< "signal should actually have been written";
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should be approx. zero";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because FD was signalled";
EXPECT_EQ(1, handler.callbackCount)
<< "callback should be invoked exactly once";
EXPECT_EQ(pipe.receiveFd, handler.fd)
<< "callback should have received pipe fd as parameter";
EXPECT_EQ(Looper::EVENT_INPUT, handler.events)
<< "callback should have received Looper::EVENT_INPUT as events";
}
TEST_F(LooperTest, PollOnce_WhenNonZeroTimeoutAndSignalledFDWhileWaiting_PromptlyInvokesCallbackAndReturns) {
Pipe pipe;
StubCallbackHandler handler(true);
sp<DelayedWriteSignal> delayedWriteSignal = new DelayedWriteSignal(100, & pipe);
handler.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
delayedWriteSignal->run("LooperTest");
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(1000);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
ASSERT_EQ(OK, pipe.readSignal())
<< "signal should actually have been written";
EXPECT_NEAR(100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. equal signal delay";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because FD was signalled";
EXPECT_EQ(1, handler.callbackCount)
<< "callback should be invoked exactly once";
EXPECT_EQ(pipe.receiveFd, handler.fd)
<< "callback should have received pipe fd as parameter";
EXPECT_EQ(Looper::EVENT_INPUT, handler.events)
<< "callback should have received Looper::EVENT_INPUT as events";
}
TEST_F(LooperTest, PollOnce_WhenCallbackAddedThenRemoved_CallbackShouldNotBeInvoked) {
Pipe pipe;
StubCallbackHandler handler(true);
handler.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
pipe.writeSignal(); // would cause FD to be considered signalled
mLooper->removeFd(pipe.receiveFd);
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
ASSERT_EQ(OK, pipe.readSignal())
<< "signal should actually have been written";
EXPECT_NEAR(100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. equal timeout because FD was no longer registered";
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT";
EXPECT_EQ(0, handler.callbackCount)
<< "callback should not be invoked";
}
TEST_F(LooperTest, PollOnce_WhenCallbackReturnsFalse_CallbackShouldNotBeInvokedAgainLater) {
Pipe pipe;
StubCallbackHandler handler(false);
handler.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
// First loop: Callback is registered and FD is signalled.
pipe.writeSignal();
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(0);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
ASSERT_EQ(OK, pipe.readSignal())
<< "signal should actually have been written";
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. equal zero because FD was already signalled";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because FD was signalled";
EXPECT_EQ(1, handler.callbackCount)
<< "callback should be invoked";
// Second loop: Callback is no longer registered and FD is signalled.
pipe.writeSignal();
stopWatch.reset();
result = mLooper->pollOnce(0);
elapsedMillis = ns2ms(stopWatch.elapsedTime());
ASSERT_EQ(OK, pipe.readSignal())
<< "signal should actually have been written";
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. equal zero because timeout was zero";
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT";
EXPECT_EQ(1, handler.callbackCount)
<< "callback should not be invoked this time";
}
TEST_F(LooperTest, PollOnce_WhenNonCallbackFdIsSignalled_ReturnsIdent) {
const int expectedIdent = 5;
void* expectedData = this;
Pipe pipe;
pipe.writeSignal();
mLooper->addFd(pipe.receiveFd, expectedIdent, Looper::EVENT_INPUT, NULL, expectedData);
StopWatch stopWatch("pollOnce");
int fd;
int events;
void* data;
int result = mLooper->pollOnce(100, &fd, &events, &data);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
ASSERT_EQ(OK, pipe.readSignal())
<< "signal should actually have been written";
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should be approx. zero";
EXPECT_EQ(expectedIdent, result)
<< "pollOnce result should be the ident of the FD that was signalled";
EXPECT_EQ(pipe.receiveFd, fd)
<< "pollOnce should have returned the received pipe fd";
EXPECT_EQ(Looper::EVENT_INPUT, events)
<< "pollOnce should have returned Looper::EVENT_INPUT as events";
EXPECT_EQ(expectedData, data)
<< "pollOnce should have returned the data";
}
TEST_F(LooperTest, AddFd_WhenCallbackAdded_ReturnsOne) {
Pipe pipe;
int result = mLooper->addFd(pipe.receiveFd, 0, Looper::EVENT_INPUT, NULL, NULL);
EXPECT_EQ(1, result)
<< "addFd should return 1 because FD was added";
}
TEST_F(LooperTest, AddFd_WhenIdentIsNegativeAndCallbackIsNull_ReturnsError) {
Pipe pipe;
int result = mLooper->addFd(pipe.receiveFd, -1, Looper::EVENT_INPUT, NULL, NULL);
EXPECT_EQ(-1, result)
<< "addFd should return -1 because arguments were invalid";
}
TEST_F(LooperTest, AddFd_WhenNoCallbackAndAllowNonCallbacksIsFalse_ReturnsError) {
Pipe pipe;
sp<Looper> looper = new Looper(false /*allowNonCallbacks*/);
int result = looper->addFd(pipe.receiveFd, 0, 0, NULL, NULL);
EXPECT_EQ(-1, result)
<< "addFd should return -1 because arguments were invalid";
}
TEST_F(LooperTest, RemoveFd_WhenCallbackNotAdded_ReturnsZero) {
int result = mLooper->removeFd(1);
EXPECT_EQ(0, result)
<< "removeFd should return 0 because FD not registered";
}
TEST_F(LooperTest, RemoveFd_WhenCallbackAddedThenRemovedTwice_ReturnsOnceFirstTimeAndReturnsZeroSecondTime) {
Pipe pipe;
StubCallbackHandler handler(false);
handler.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
// First time.
int result = mLooper->removeFd(pipe.receiveFd);
EXPECT_EQ(1, result)
<< "removeFd should return 1 first time because FD was registered";
// Second time.
result = mLooper->removeFd(pipe.receiveFd);
EXPECT_EQ(0, result)
<< "removeFd should return 0 second time because FD was no longer registered";
}
TEST_F(LooperTest, PollOnce_WhenCallbackAddedTwice_OnlySecondCallbackShouldBeInvoked) {
Pipe pipe;
StubCallbackHandler handler1(true);
StubCallbackHandler handler2(true);
handler1.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT);
handler2.setCallback(mLooper, pipe.receiveFd, Looper::EVENT_INPUT); // replace it
pipe.writeSignal(); // would cause FD to be considered signalled
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
ASSERT_EQ(OK, pipe.readSignal())
<< "signal should actually have been written";
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because FD was already signalled";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because FD was signalled";
EXPECT_EQ(0, handler1.callbackCount)
<< "original handler callback should not be invoked because it was replaced";
EXPECT_EQ(1, handler2.callbackCount)
<< "replacement handler callback should be invoked";
}
TEST_F(LooperTest, SendMessage_WhenOneMessageIsEnqueue_ShouldInvokeHandlerDuringNextPoll) {
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessage(handler, Message(MSG_TEST1));
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because message was already sent";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because message was sent";
EXPECT_EQ(size_t(1), handler->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST1, handler->messages[0].what)
<< "handled message";
}
TEST_F(LooperTest, SendMessage_WhenMultipleMessagesAreEnqueued_ShouldInvokeHandlersInOrderDuringNextPoll) {
sp<StubMessageHandler> handler1 = new StubMessageHandler();
sp<StubMessageHandler> handler2 = new StubMessageHandler();
mLooper->sendMessage(handler1, Message(MSG_TEST1));
mLooper->sendMessage(handler2, Message(MSG_TEST2));
mLooper->sendMessage(handler1, Message(MSG_TEST3));
mLooper->sendMessage(handler1, Message(MSG_TEST4));
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(1000);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because message was already sent";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because message was sent";
EXPECT_EQ(size_t(3), handler1->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST1, handler1->messages[0].what)
<< "handled message";
EXPECT_EQ(MSG_TEST3, handler1->messages[1].what)
<< "handled message";
EXPECT_EQ(MSG_TEST4, handler1->messages[2].what)
<< "handled message";
EXPECT_EQ(size_t(1), handler2->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST2, handler2->messages[0].what)
<< "handled message";
}
TEST_F(LooperTest, SendMessageDelayed_WhenSentToTheFuture_ShouldInvokeHandlerAfterDelayTime) {
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessageDelayed(ms2ns(100), handler, Message(MSG_TEST1));
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(1000);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "first poll should end quickly because next message timeout was computed";
EXPECT_EQ(Looper::POLL_WAKE, result)
<< "pollOnce result should be Looper::POLL_WAKE due to wakeup";
EXPECT_EQ(size_t(0), handler->messages.size())
<< "no message handled yet";
result = mLooper->pollOnce(1000);
elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_EQ(size_t(1), handler->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST1, handler->messages[0].what)
<< "handled message";
EXPECT_NEAR(100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "second poll should end around the time of the delayed message dispatch";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because message was sent";
result = mLooper->pollOnce(100);
elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(100 + 100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "third poll should timeout";
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT because there were no messages left";
}
TEST_F(LooperTest, SendMessageDelayed_WhenSentToThePast_ShouldInvokeHandlerDuringNextPoll) {
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessageDelayed(ms2ns(-1000), handler, Message(MSG_TEST1));
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because message was already sent";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because message was sent";
EXPECT_EQ(size_t(1), handler->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST1, handler->messages[0].what)
<< "handled message";
}
TEST_F(LooperTest, SendMessageDelayed_WhenSentToThePresent_ShouldInvokeHandlerDuringNextPoll) {
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessageDelayed(0, handler, Message(MSG_TEST1));
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because message was already sent";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because message was sent";
EXPECT_EQ(size_t(1), handler->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST1, handler->messages[0].what)
<< "handled message";
}
TEST_F(LooperTest, SendMessageAtTime_WhenSentToTheFuture_ShouldInvokeHandlerAfterDelayTime) {
nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessageAtTime(now + ms2ns(100), handler, Message(MSG_TEST1));
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(1000);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "first poll should end quickly because next message timeout was computed";
EXPECT_EQ(Looper::POLL_WAKE, result)
<< "pollOnce result should be Looper::POLL_WAKE due to wakeup";
EXPECT_EQ(size_t(0), handler->messages.size())
<< "no message handled yet";
result = mLooper->pollOnce(1000);
elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_EQ(size_t(1), handler->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST1, handler->messages[0].what)
<< "handled message";
EXPECT_NEAR(100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "second poll should end around the time of the delayed message dispatch";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because message was sent";
result = mLooper->pollOnce(100);
elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(100 + 100, elapsedMillis, TIMING_TOLERANCE_MS)
<< "third poll should timeout";
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT because there were no messages left";
}
TEST_F(LooperTest, SendMessageAtTime_WhenSentToThePast_ShouldInvokeHandlerDuringNextPoll) {
nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessageAtTime(now - ms2ns(1000), handler, Message(MSG_TEST1));
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because message was already sent";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because message was sent";
EXPECT_EQ(size_t(1), handler->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST1, handler->messages[0].what)
<< "handled message";
}
TEST_F(LooperTest, SendMessageAtTime_WhenSentToThePresent_ShouldInvokeHandlerDuringNextPoll) {
nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessageAtTime(now, handler, Message(MSG_TEST1));
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(100);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because message was already sent";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because message was sent";
EXPECT_EQ(size_t(1), handler->messages.size())
<< "handled message";
EXPECT_EQ(MSG_TEST1, handler->messages[0].what)
<< "handled message";
}
TEST_F(LooperTest, RemoveMessage_WhenRemovingAllMessagesForHandler_ShouldRemoveThoseMessage) {
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessage(handler, Message(MSG_TEST1));
mLooper->sendMessage(handler, Message(MSG_TEST2));
mLooper->sendMessage(handler, Message(MSG_TEST3));
mLooper->removeMessages(handler);
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(0);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because message was sent so looper was awoken";
EXPECT_EQ(Looper::POLL_WAKE, result)
<< "pollOnce result should be Looper::POLL_WAKE because looper was awoken";
EXPECT_EQ(size_t(0), handler->messages.size())
<< "no messages to handle";
result = mLooper->pollOnce(0);
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT because there was nothing to do";
EXPECT_EQ(size_t(0), handler->messages.size())
<< "no messages to handle";
}
TEST_F(LooperTest, RemoveMessage_WhenRemovingSomeMessagesForHandler_ShouldRemoveThoseMessage) {
sp<StubMessageHandler> handler = new StubMessageHandler();
mLooper->sendMessage(handler, Message(MSG_TEST1));
mLooper->sendMessage(handler, Message(MSG_TEST2));
mLooper->sendMessage(handler, Message(MSG_TEST3));
mLooper->sendMessage(handler, Message(MSG_TEST4));
mLooper->removeMessages(handler, MSG_TEST3);
mLooper->removeMessages(handler, MSG_TEST1);
StopWatch stopWatch("pollOnce");
int result = mLooper->pollOnce(0);
int32_t elapsedMillis = ns2ms(stopWatch.elapsedTime());
EXPECT_NEAR(0, elapsedMillis, TIMING_TOLERANCE_MS)
<< "elapsed time should approx. zero because message was sent so looper was awoken";
EXPECT_EQ(Looper::POLL_CALLBACK, result)
<< "pollOnce result should be Looper::POLL_CALLBACK because two messages were sent";
EXPECT_EQ(size_t(2), handler->messages.size())
<< "no messages to handle";
EXPECT_EQ(MSG_TEST2, handler->messages[0].what)
<< "handled message";
EXPECT_EQ(MSG_TEST4, handler->messages[1].what)
<< "handled message";
result = mLooper->pollOnce(0);
EXPECT_EQ(Looper::POLL_TIMEOUT, result)
<< "pollOnce result should be Looper::POLL_TIMEOUT because there was nothing to do";
EXPECT_EQ(size_t(2), handler->messages.size())
<< "no more messages to handle";
}
} // namespace android
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