Merge "Add a unit test for TouchpadInputMapper" into udc-dev am: 1930f60ddf

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/23267663

Change-Id: I3c3d4b54c17f0c82fbdfe6e6ea0000cba8b684c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

7 files changed, 521 insertions, 0 deletions

diff --git a/include/input/Input.h b/include/input/Input.h
index fe0c775fd3..527a47741c 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -242,6 +242,19 @@ enum class ToolType {
     ftl_last = PALM,
 };
 
+/**
+ * The state of the key. This should have 1:1 correspondence with the values of anonymous enum
+ * defined in input.h
+ */
+enum class KeyState {
+    UNKNOWN = AKEY_STATE_UNKNOWN,
+    UP = AKEY_STATE_UP,
+    DOWN = AKEY_STATE_DOWN,
+    VIRTUAL = AKEY_STATE_VIRTUAL,
+    ftl_first = UNKNOWN,
+    ftl_last = VIRTUAL,
+};
+
 bool isStylusToolType(ToolType toolType);
 
 /*
diff --git a/services/inputflinger/tests/Android.bp b/services/inputflinger/tests/Android.bp
index 52277ff078..569690ab78 100644
--- a/services/inputflinger/tests/Android.bp
+++ b/services/inputflinger/tests/Android.bp
@@ -40,6 +40,7 @@ cc_test {
         "AnrTracker_test.cpp",
         "BlockingQueue_test.cpp",
         "CapturedTouchpadEventConverter_test.cpp",
+        "CursorInputMapper_test.cpp",
         "EventHub_test.cpp",
         "FakeEventHub.cpp",
         "FakeInputReaderPolicy.cpp",
@@ -58,6 +59,7 @@ cc_test {
         "PreferStylusOverTouch_test.cpp",
         "PropertyProvider_test.cpp",
         "TestInputListener.cpp",
+        "TouchpadInputMapper_test.cpp",
         "UinputDevice.cpp",
         "UnwantedInteractionBlocker_test.cpp",
     ],
diff --git a/services/inputflinger/tests/CursorInputMapper_test.cpp b/services/inputflinger/tests/CursorInputMapper_test.cpp
new file mode 100644
index 0000000000..6774b1793f
--- /dev/null
+++ b/services/inputflinger/tests/CursorInputMapper_test.cpp
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2023 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 "CursorInputMapper.h"
+
+#include <android-base/logging.h>
+#include <gtest/gtest.h>
+
+#include "FakePointerController.h"
+#include "InputMapperTest.h"
+#include "InterfaceMocks.h"
+#include "TestInputListenerMatchers.h"
+
+#define TAG "CursorInputMapper_test"
+
+namespace android {
+
+using testing::Return;
+using testing::VariantWith;
+constexpr auto ACTION_DOWN = AMOTION_EVENT_ACTION_DOWN;
+constexpr auto ACTION_MOVE = AMOTION_EVENT_ACTION_MOVE;
+constexpr auto ACTION_UP = AMOTION_EVENT_ACTION_UP;
+constexpr auto BUTTON_PRESS = AMOTION_EVENT_ACTION_BUTTON_PRESS;
+constexpr auto BUTTON_RELEASE = AMOTION_EVENT_ACTION_BUTTON_RELEASE;
+constexpr auto HOVER_MOVE = AMOTION_EVENT_ACTION_HOVER_MOVE;
+
+/**
+ * Unit tests for CursorInputMapper.
+ * This class is named 'CursorInputMapperUnitTest' to avoid name collision with the existing
+ * 'CursorInputMapperTest'. If all of the CursorInputMapper tests are migrated here, the name
+ * can be simplified to 'CursorInputMapperTest'.
+ * TODO(b/283812079): move CursorInputMapper tests here.
+ */
+class CursorInputMapperUnitTest : public InputMapperUnitTest {
+protected:
+    void SetUp() override {
+        InputMapperUnitTest::SetUp();
+
+        // Current scan code state - all keys are UP by default
+        setScanCodeState(KeyState::UP,
+                         {BTN_LEFT, BTN_RIGHT, BTN_MIDDLE, BTN_BACK, BTN_SIDE, BTN_FORWARD,
+                          BTN_EXTRA, BTN_TASK});
+        EXPECT_CALL(mMockEventHub, hasRelativeAxis(EVENTHUB_ID, REL_WHEEL))
+                .WillRepeatedly(Return(false));
+        EXPECT_CALL(mMockEventHub, hasRelativeAxis(EVENTHUB_ID, REL_HWHEEL))
+                .WillRepeatedly(Return(false));
+
+        EXPECT_CALL(mMockInputReaderContext, bumpGeneration()).WillRepeatedly(Return(1));
+
+        mMapper = createInputMapper<CursorInputMapper>(*mDeviceContext, mReaderConfiguration);
+    }
+};
+
+/**
+ * Move the mouse and then click the button. Check whether HOVER_EXIT is generated when hovering
+ * ends. Currently, it is not.
+ */
+TEST_F(CursorInputMapperUnitTest, HoverAndLeftButtonPress) {
+    std::list<NotifyArgs> args;
+
+    // Move the cursor a little
+    args += process(EV_REL, REL_X, 10);
+    args += process(EV_REL, REL_Y, 20);
+    args += process(EV_SYN, SYN_REPORT, 0);
+    ASSERT_THAT(args, ElementsAre(VariantWith<NotifyMotionArgs>(WithMotionAction(HOVER_MOVE))));
+
+    // Now click the mouse button
+    args.clear();
+    args += process(EV_KEY, BTN_LEFT, 1);
+    args += process(EV_SYN, SYN_REPORT, 0);
+    ASSERT_THAT(args,
+                ElementsAre(VariantWith<NotifyMotionArgs>(WithMotionAction(ACTION_DOWN)),
+                            VariantWith<NotifyMotionArgs>(WithMotionAction(BUTTON_PRESS))));
+
+    // Move some more.
+    args.clear();
+    args += process(EV_REL, REL_X, 10);
+    args += process(EV_REL, REL_Y, 20);
+    args += process(EV_SYN, SYN_REPORT, 0);
+    ASSERT_THAT(args, ElementsAre(VariantWith<NotifyMotionArgs>(WithMotionAction(ACTION_MOVE))));
+
+    // Release the button
+    args.clear();
+    args += process(EV_KEY, BTN_LEFT, 0);
+    args += process(EV_SYN, SYN_REPORT, 0);
+    ASSERT_THAT(args,
+                ElementsAre(VariantWith<NotifyMotionArgs>(WithMotionAction(BUTTON_RELEASE)),
+                            VariantWith<NotifyMotionArgs>(WithMotionAction(ACTION_UP)),
+                            VariantWith<NotifyMotionArgs>(WithMotionAction(HOVER_MOVE))));
+}
+
+} // namespace android
diff --git a/services/inputflinger/tests/InputMapperTest.cpp b/services/inputflinger/tests/InputMapperTest.cpp
index ad48a79731..0eee2b9be4 100644
--- a/services/inputflinger/tests/InputMapperTest.cpp
+++ b/services/inputflinger/tests/InputMapperTest.cpp
@@ -22,6 +22,74 @@
 
 namespace android {
 
+using testing::Return;
+
+void InputMapperUnitTest::SetUp() {
+    mFakePointerController = std::make_shared<FakePointerController>();
+    mFakePointerController->setBounds(0, 0, 800 - 1, 480 - 1);
+    mFakePointerController->setPosition(400, 240);
+
+    EXPECT_CALL(mMockInputReaderContext, getPointerController(DEVICE_ID))
+            .WillRepeatedly(Return(mFakePointerController));
+
+    EXPECT_CALL(mMockInputReaderContext, getEventHub()).WillRepeatedly(Return(&mMockEventHub));
+    InputDeviceIdentifier identifier;
+    identifier.name = "device";
+    identifier.location = "USB1";
+    identifier.bus = 0;
+
+    EXPECT_CALL(mMockEventHub, getDeviceIdentifier(EVENTHUB_ID)).WillRepeatedly(Return(identifier));
+    mDevice = std::make_unique<InputDevice>(&mMockInputReaderContext, DEVICE_ID,
+                                            /*generation=*/2, identifier);
+    mDeviceContext = std::make_unique<InputDeviceContext>(*mDevice, EVENTHUB_ID);
+}
+
+void InputMapperUnitTest::setupAxis(int axis, bool valid, int32_t min, int32_t max,
+                                    int32_t resolution) {
+    EXPECT_CALL(mMockEventHub, getAbsoluteAxisInfo(EVENTHUB_ID, axis, testing::_))
+            .WillRepeatedly([=](int32_t, int32_t, RawAbsoluteAxisInfo* outAxisInfo) {
+                outAxisInfo->valid = valid;
+                outAxisInfo->minValue = min;
+                outAxisInfo->maxValue = max;
+                outAxisInfo->flat = 0;
+                outAxisInfo->fuzz = 0;
+                outAxisInfo->resolution = resolution;
+                return valid ? OK : -1;
+            });
+}
+
+void InputMapperUnitTest::expectScanCodes(bool present, std::set<int> scanCodes) {
+    for (const auto& scanCode : scanCodes) {
+        EXPECT_CALL(mMockEventHub, hasScanCode(EVENTHUB_ID, scanCode))
+                .WillRepeatedly(testing::Return(present));
+    }
+}
+
+void InputMapperUnitTest::setScanCodeState(KeyState state, std::set<int> scanCodes) {
+    for (const auto& scanCode : scanCodes) {
+        EXPECT_CALL(mMockEventHub, getScanCodeState(EVENTHUB_ID, scanCode))
+                .WillRepeatedly(testing::Return(static_cast<int>(state)));
+    }
+}
+
+void InputMapperUnitTest::setKeyCodeState(KeyState state, std::set<int> keyCodes) {
+    for (const auto& keyCode : keyCodes) {
+        EXPECT_CALL(mMockEventHub, getKeyCodeState(EVENTHUB_ID, keyCode))
+                .WillRepeatedly(testing::Return(static_cast<int>(state)));
+    }
+}
+
+std::list<NotifyArgs> InputMapperUnitTest::process(int32_t type, int32_t code, int32_t value) {
+    RawEvent event;
+    event.when = systemTime(SYSTEM_TIME_MONOTONIC);
+    event.readTime = event.when;
+    event.deviceId = mMapper->getDeviceContext().getEventHubId();
+    event.type = type;
+    event.code = code;
+    event.value = value;
+    return mMapper->process(&event);
+}
+
 const char* InputMapperTest::DEVICE_NAME = "device";
 const char* InputMapperTest::DEVICE_LOCATION = "USB1";
 const ftl::Flags<InputDeviceClass> InputMapperTest::DEVICE_CLASSES =
diff --git a/services/inputflinger/tests/InputMapperTest.h b/services/inputflinger/tests/InputMapperTest.h
index 2b6655c45e..909bd9c056 100644
--- a/services/inputflinger/tests/InputMapperTest.h
+++ b/services/inputflinger/tests/InputMapperTest.h
@@ -23,16 +23,48 @@
 #include <InputMapper.h>
 #include <NotifyArgs.h>
 #include <ftl/flags.h>
+#include <gmock/gmock.h>
 #include <utils/StrongPointer.h>
 
 #include "FakeEventHub.h"
 #include "FakeInputReaderPolicy.h"
 #include "InstrumentedInputReader.h"
+#include "InterfaceMocks.h"
 #include "TestConstants.h"
 #include "TestInputListener.h"
 
 namespace android {
 
+class InputMapperUnitTest : public testing::Test {
+protected:
+    static constexpr int32_t EVENTHUB_ID = 1;
+    static constexpr int32_t DEVICE_ID = END_RESERVED_ID + 1000;
+    virtual void SetUp() override;
+
+    void setupAxis(int axis, bool valid, int32_t min, int32_t max, int32_t resolution);
+
+    void expectScanCodes(bool present, std::set<int> scanCodes);
+
+    void setScanCodeState(KeyState state, std::set<int> scanCodes);
+
+    void setKeyCodeState(KeyState state, std::set<int> keyCodes);
+
+    std::list<NotifyArgs> process(int32_t type, int32_t code, int32_t value);
+
+    MockEventHubInterface mMockEventHub;
+    std::shared_ptr<FakePointerController> mFakePointerController;
+    MockInputReaderContext mMockInputReaderContext;
+    std::unique_ptr<InputDevice> mDevice;
+
+    std::unique_ptr<InputDeviceContext> mDeviceContext;
+    InputReaderConfiguration mReaderConfiguration;
+    // The mapper should be created by the subclasses.
+    std::unique_ptr<InputMapper> mMapper;
+};
+
+/**
+ * Deprecated - use InputMapperUnitTest instead.
+ */
 class InputMapperTest : public testing::Test {
 protected:
     static const char* DEVICE_NAME;
diff --git a/services/inputflinger/tests/InterfaceMocks.h b/services/inputflinger/tests/InterfaceMocks.h
new file mode 100644
index 0000000000..d720a902dc
--- /dev/null
+++ b/services/inputflinger/tests/InterfaceMocks.h
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2023 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.
+ */
+
+#pragma once
+
+#include <android-base/logging.h>
+#include <gmock/gmock.h>
+
+namespace android {
+
+class MockInputReaderContext : public InputReaderContext {
+public:
+    MOCK_METHOD(void, updateGlobalMetaState, (), (override));
+    int32_t getGlobalMetaState() override { return 0; };
+
+    MOCK_METHOD(void, disableVirtualKeysUntil, (nsecs_t time), (override));
+    MOCK_METHOD(bool, shouldDropVirtualKey, (nsecs_t now, int32_t keyCode, int32_t scanCode),
+                (override));
+
+    MOCK_METHOD(void, fadePointer, (), (override));
+    MOCK_METHOD(std::shared_ptr<PointerControllerInterface>, getPointerController,
+                (int32_t deviceId), (override));
+
+    MOCK_METHOD(void, requestTimeoutAtTime, (nsecs_t when), (override));
+    MOCK_METHOD(int32_t, bumpGeneration, (), (override));
+
+    MOCK_METHOD(void, getExternalStylusDevices, (std::vector<InputDeviceInfo> & outDevices),
+                (override));
+    MOCK_METHOD(std::list<NotifyArgs>, dispatchExternalStylusState, (const StylusState& outState),
+                (override));
+
+    MOCK_METHOD(InputReaderPolicyInterface*, getPolicy, (), (override));
+    MOCK_METHOD(EventHubInterface*, getEventHub, (), (override));
+
+    int32_t getNextId() override { return 1; };
+
+    MOCK_METHOD(void, updateLedMetaState, (int32_t metaState), (override));
+    MOCK_METHOD(int32_t, getLedMetaState, (), (override));
+};
+
+class MockEventHubInterface : public EventHubInterface {
+public:
+    MOCK_METHOD(ftl::Flags<InputDeviceClass>, getDeviceClasses, (int32_t deviceId), (const));
+    MOCK_METHOD(InputDeviceIdentifier, getDeviceIdentifier, (int32_t deviceId), (const));
+    MOCK_METHOD(int32_t, getDeviceControllerNumber, (int32_t deviceId), (const));
+    MOCK_METHOD(std::optional<PropertyMap>, getConfiguration, (int32_t deviceId), (const));
+    MOCK_METHOD(status_t, getAbsoluteAxisInfo,
+                (int32_t deviceId, int axis, RawAbsoluteAxisInfo* outAxisInfo), (const));
+    MOCK_METHOD(bool, hasRelativeAxis, (int32_t deviceId, int axis), (const));
+    MOCK_METHOD(bool, hasInputProperty, (int32_t deviceId, int property), (const));
+    MOCK_METHOD(bool, hasMscEvent, (int32_t deviceId, int mscEvent), (const));
+    MOCK_METHOD(void, addKeyRemapping, (int32_t deviceId, int fromKeyCode, int toKeyCode), (const));
+    MOCK_METHOD(status_t, mapKey,
+                (int32_t deviceId, int scanCode, int usageCode, int32_t metaState,
+                 int32_t* outKeycode, int32_t* outMetaState, uint32_t* outFlags),
+                (const));
+    MOCK_METHOD(status_t, mapAxis, (int32_t deviceId, int scanCode, AxisInfo* outAxisInfo),
+                (const));
+    MOCK_METHOD(void, setExcludedDevices, (const std::vector<std::string>& devices));
+    MOCK_METHOD(std::vector<RawEvent>, getEvents, (int timeoutMillis));
+    MOCK_METHOD(std::vector<TouchVideoFrame>, getVideoFrames, (int32_t deviceId));
+    MOCK_METHOD((base::Result<std::pair<InputDeviceSensorType, int32_t>>), mapSensor,
+                (int32_t deviceId, int32_t absCode), (const, override));
+    MOCK_METHOD(std::vector<int32_t>, getRawBatteryIds, (int32_t deviceId), (const, override));
+    MOCK_METHOD(std::optional<RawBatteryInfo>, getRawBatteryInfo,
+                (int32_t deviceId, int32_t BatteryId), (const, override));
+    MOCK_METHOD(std::vector<int32_t>, getRawLightIds, (int32_t deviceId), (const, override));
+    MOCK_METHOD(std::optional<RawLightInfo>, getRawLightInfo, (int32_t deviceId, int32_t lightId),
+                (const, override));
+    MOCK_METHOD(std::optional<int32_t>, getLightBrightness, (int32_t deviceId, int32_t lightId),
+                (const, override));
+    MOCK_METHOD(void, setLightBrightness, (int32_t deviceId, int32_t lightId, int32_t brightness),
+                (override));
+    MOCK_METHOD((std::optional<std::unordered_map<LightColor, int32_t>>), getLightIntensities,
+                (int32_t deviceId, int32_t lightId), (const, override));
+    MOCK_METHOD(void, setLightIntensities,
+                (int32_t deviceId, int32_t lightId,
+                 (std::unordered_map<LightColor, int32_t>)intensities),
+                (override));
+
+    MOCK_METHOD(std::optional<RawLayoutInfo>, getRawLayoutInfo, (int32_t deviceId),
+                (const, override));
+    MOCK_METHOD(int32_t, getScanCodeState, (int32_t deviceId, int32_t scanCode), (const, override));
+    MOCK_METHOD(int32_t, getKeyCodeState, (int32_t deviceId, int32_t keyCode), (const, override));
+    MOCK_METHOD(int32_t, getSwitchState, (int32_t deviceId, int32_t sw), (const, override));
+
+    MOCK_METHOD(status_t, getAbsoluteAxisValue, (int32_t deviceId, int32_t axis, int32_t* outValue),
+                (const, override));
+    MOCK_METHOD(int32_t, getKeyCodeForKeyLocation, (int32_t deviceId, int32_t locationKeyCode),
+                (const, override));
+    MOCK_METHOD(bool, markSupportedKeyCodes,
+                (int32_t deviceId, const std::vector<int32_t>& keyCodes, uint8_t* outFlags),
+                (const, override));
+
+    MOCK_METHOD(bool, hasScanCode, (int32_t deviceId, int32_t scanCode), (const, override));
+
+    MOCK_METHOD(bool, hasKeyCode, (int32_t deviceId, int32_t keyCode), (const, override));
+
+    MOCK_METHOD(bool, hasLed, (int32_t deviceId, int32_t led), (const, override));
+
+    MOCK_METHOD(void, setLedState, (int32_t deviceId, int32_t led, bool on), (override));
+
+    MOCK_METHOD(void, getVirtualKeyDefinitions,
+                (int32_t deviceId, std::vector<VirtualKeyDefinition>& outVirtualKeys),
+                (const, override));
+
+    MOCK_METHOD(const std::shared_ptr<KeyCharacterMap>, getKeyCharacterMap, (int32_t deviceId),
+                (const, override));
+
+    MOCK_METHOD(bool, setKeyboardLayoutOverlay,
+                (int32_t deviceId, std::shared_ptr<KeyCharacterMap> map), (override));
+
+    MOCK_METHOD(void, vibrate, (int32_t deviceId, const VibrationElement& effect), (override));
+    MOCK_METHOD(void, cancelVibrate, (int32_t deviceId), (override));
+
+    MOCK_METHOD(std::vector<int32_t>, getVibratorIds, (int32_t deviceId), (const, override));
+    MOCK_METHOD(std::optional<int32_t>, getBatteryCapacity, (int32_t deviceId, int32_t batteryId),
+                (const, override));
+
+    MOCK_METHOD(std::optional<int32_t>, getBatteryStatus, (int32_t deviceId, int32_t batteryId),
+                (const, override));
+    MOCK_METHOD(void, requestReopenDevices, (), (override));
+    MOCK_METHOD(void, wake, (), (override));
+
+    MOCK_METHOD(void, dump, (std::string & dump), (const, override));
+    MOCK_METHOD(void, monitor, (), (const, override));
+    MOCK_METHOD(bool, isDeviceEnabled, (int32_t deviceId), (const, override));
+    MOCK_METHOD(status_t, enableDevice, (int32_t deviceId), (override));
+    MOCK_METHOD(status_t, disableDevice, (int32_t deviceId), (override));
+    MOCK_METHOD(void, sysfsNodeChanged, (const std::string& sysfsNodePath), (override));
+};
+
+} // namespace android
diff --git a/services/inputflinger/tests/TouchpadInputMapper_test.cpp b/services/inputflinger/tests/TouchpadInputMapper_test.cpp
new file mode 100644
index 0000000000..92cd462c9a
--- /dev/null
+++ b/services/inputflinger/tests/TouchpadInputMapper_test.cpp
@@ -0,0 +1,155 @@
+/*
+ * Copyright 2023 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 "TouchpadInputMapper.h"
+
+#include <android-base/logging.h>
+#include <gtest/gtest.h>
+
+#include <thread>
+#include "FakePointerController.h"
+#include "InputMapperTest.h"
+#include "InterfaceMocks.h"
+#include "TestInputListenerMatchers.h"
+
+#define TAG "TouchpadInputMapper_test"
+
+namespace android {
+
+using testing::Return;
+using testing::VariantWith;
+constexpr auto ACTION_DOWN = AMOTION_EVENT_ACTION_DOWN;
+constexpr auto ACTION_UP = AMOTION_EVENT_ACTION_UP;
+constexpr auto BUTTON_PRESS = AMOTION_EVENT_ACTION_BUTTON_PRESS;
+constexpr auto BUTTON_RELEASE = AMOTION_EVENT_ACTION_BUTTON_RELEASE;
+constexpr auto HOVER_MOVE = AMOTION_EVENT_ACTION_HOVER_MOVE;
+
+/**
+ * Unit tests for TouchpadInputMapper.
+ */
+class TouchpadInputMapperTest : public InputMapperUnitTest {
+protected:
+    void SetUp() override {
+        InputMapperUnitTest::SetUp();
+
+        // Present scan codes: BTN_TOUCH and BTN_TOOL_FINGER
+        expectScanCodes(/*present=*/true,
+                        {BTN_LEFT, BTN_RIGHT, BTN_TOOL_FINGER, BTN_TOOL_QUINTTAP, BTN_TOUCH,
+                         BTN_TOOL_DOUBLETAP, BTN_TOOL_TRIPLETAP, BTN_TOOL_QUADTAP});
+        // Missing scan codes that the mapper checks for.
+        expectScanCodes(/*present=*/false,
+                        {BTN_TOOL_PEN, BTN_TOOL_RUBBER, BTN_TOOL_BRUSH, BTN_TOOL_PENCIL,
+                         BTN_TOOL_AIRBRUSH});
+
+        // Current scan code state - all keys are UP by default
+        setScanCodeState(KeyState::UP, {BTN_TOUCH,          BTN_STYLUS,
+                                        BTN_STYLUS2,        BTN_0,
+                                        BTN_TOOL_FINGER,    BTN_TOOL_PEN,
+                                        BTN_TOOL_RUBBER,    BTN_TOOL_BRUSH,
+                                        BTN_TOOL_PENCIL,    BTN_TOOL_AIRBRUSH,
+                                        BTN_TOOL_MOUSE,     BTN_TOOL_LENS,
+                                        BTN_TOOL_DOUBLETAP, BTN_TOOL_TRIPLETAP,
+                                        BTN_TOOL_QUADTAP,   BTN_TOOL_QUINTTAP,
+                                        BTN_LEFT,           BTN_RIGHT,
+                                        BTN_MIDDLE,         BTN_BACK,
+                                        BTN_SIDE,           BTN_FORWARD,
+                                        BTN_EXTRA,          BTN_TASK});
+
+        setKeyCodeState(KeyState::UP,
+                        {AKEYCODE_STYLUS_BUTTON_PRIMARY, AKEYCODE_STYLUS_BUTTON_SECONDARY});
+
+        // Key mappings
+        EXPECT_CALL(mMockEventHub,
+                    mapKey(EVENTHUB_ID, BTN_LEFT, /*usageCode=*/0, /*metaState=*/0, testing::_,
+                           testing::_, testing::_))
+                .WillRepeatedly(Return(NAME_NOT_FOUND));
+
+        // Input properties - only INPUT_PROP_BUTTONPAD
+        EXPECT_CALL(mMockEventHub, hasInputProperty(EVENTHUB_ID, INPUT_PROP_BUTTONPAD))
+                .WillRepeatedly(Return(true));
+        EXPECT_CALL(mMockEventHub, hasInputProperty(EVENTHUB_ID, INPUT_PROP_SEMI_MT))
+                .WillRepeatedly(Return(false));
+
+        // Axes that the device has
+        setupAxis(ABS_MT_SLOT, /*valid=*/true, /*min=*/0, /*max=*/4, /*resolution=*/0);
+        setupAxis(ABS_MT_POSITION_X, /*valid=*/true, /*min=*/0, /*max=*/2000, /*resolution=*/24);
+        setupAxis(ABS_MT_POSITION_Y, /*valid=*/true, /*min=*/0, /*max=*/1000, /*resolution=*/24);
+        setupAxis(ABS_MT_PRESSURE, /*valid=*/true, /*min*/ 0, /*max=*/255, /*resolution=*/0);
+        // Axes that the device does not have
+        setupAxis(ABS_MT_ORIENTATION, /*valid=*/false, /*min=*/0, /*max=*/0, /*resolution=*/0);
+        setupAxis(ABS_MT_TOUCH_MAJOR, /*valid=*/false, /*min=*/0, /*max=*/0, /*resolution=*/0);
+        setupAxis(ABS_MT_TOUCH_MINOR, /*valid=*/false, /*min=*/0, /*max=*/0, /*resolution=*/0);
+        setupAxis(ABS_MT_WIDTH_MAJOR, /*valid=*/false, /*min=*/0, /*max=*/0, /*resolution=*/0);
+        setupAxis(ABS_MT_WIDTH_MINOR, /*valid=*/false, /*min=*/0, /*max=*/0, /*resolution=*/0);
+
+        EXPECT_CALL(mMockEventHub, getAbsoluteAxisValue(EVENTHUB_ID, ABS_MT_SLOT, testing::_))
+                .WillRepeatedly([](int32_t eventHubId, int32_t, int32_t* outValue) {
+                    *outValue = 0;
+                    return OK;
+                });
+        mMapper = createInputMapper<TouchpadInputMapper>(*mDeviceContext, mReaderConfiguration);
+    }
+};
+
+/**
+ * Start moving the finger and then click the left touchpad button. Check whether HOVER_EXIT is
+ * generated when hovering stops. Currently, it is not.
+ * In the current implementation, HOVER_MOVE and ACTION_DOWN events are not sent out right away,
+ * but only after the button is released.
+ */
+TEST_F(TouchpadInputMapperTest, HoverAndLeftButtonPress) {
+    std::list<NotifyArgs> args;
+
+    args += process(EV_ABS, ABS_MT_TRACKING_ID, 1);
+    args += process(EV_KEY, BTN_TOUCH, 1);
+    setScanCodeState(KeyState::DOWN, {BTN_TOOL_FINGER});
+    args += process(EV_KEY, BTN_TOOL_FINGER, 1);
+    args += process(EV_ABS, ABS_MT_POSITION_X, 50);
+    args += process(EV_ABS, ABS_MT_POSITION_Y, 50);
+    args += process(EV_ABS, ABS_MT_PRESSURE, 1);
+    args += process(EV_SYN, SYN_REPORT, 0);
+    ASSERT_THAT(args, testing::IsEmpty());
+
+    // Without this sleep, the test fails.
+    // TODO(b/284133337): Figure out whether this can be removed
+    std::this_thread::sleep_for(std::chrono::milliseconds(20));
+
+    args += process(EV_KEY, BTN_LEFT, 1);
+    setScanCodeState(KeyState::DOWN, {BTN_LEFT});
+    args += process(EV_SYN, SYN_REPORT, 0);
+
+    args += process(EV_KEY, BTN_LEFT, 0);
+    setScanCodeState(KeyState::UP, {BTN_LEFT});
+    args += process(EV_SYN, SYN_REPORT, 0);
+    ASSERT_THAT(args,
+                ElementsAre(VariantWith<NotifyMotionArgs>(WithMotionAction(HOVER_MOVE)),
+                            VariantWith<NotifyMotionArgs>(WithMotionAction(ACTION_DOWN)),
+                            VariantWith<NotifyMotionArgs>(WithMotionAction(BUTTON_PRESS)),
+                            VariantWith<NotifyMotionArgs>(WithMotionAction(BUTTON_RELEASE)),
+                            VariantWith<NotifyMotionArgs>(WithMotionAction(ACTION_UP))));
+
+    // Liftoff
+    args.clear();
+    args += process(EV_ABS, ABS_MT_PRESSURE, 0);
+    args += process(EV_ABS, ABS_MT_TRACKING_ID, -1);
+    args += process(EV_KEY, BTN_TOUCH, 0);
+    setScanCodeState(KeyState::UP, {BTN_TOOL_FINGER});
+    args += process(EV_KEY, BTN_TOOL_FINGER, 0);
+    args += process(EV_SYN, SYN_REPORT, 0);
+    ASSERT_THAT(args, testing::IsEmpty());
+}
+
+} // namespace android