src/gestures_unittest.cc

// Copyright 2012 The ChromiumOS Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <gtest/gtest.h>
#include <memory>
#include <stdio.h>

#include "include/gestures.h"
#include "include/macros.h"
#include "include/unittest_util.h"

namespace gestures {

using std::string;

class GesturesTest : public ::testing::Test {};

TEST(GesturesTest, SameFingersAsTest) {
  FingerState finger_states[] = {
    // TM, Tm, WM, Wm, Press, Orientation, X, Y, TrID
    {0, 0, 0, 0, 1, 0, 0, 0, 1, 0},
    {0, 0, 0, 0, 1, 0, 0, 0, 1, 0},
    {0, 0, 0, 0, 1, 0, 0, 0, 2, 0},
    {0, 0, 0, 0, 1, 0, 0, 0, 3, 0},
    {0, 0, 0, 0, 1, 0, 0, 0, 4, 0},
    {0, 0, 0, 0, 1, 0, 0, 0, 5, 0}
  };
  HardwareState hardware_state[] = {
    // time, buttons, finger count, finger states pointer
    make_hwstate(200000, 0, 1, 1, &finger_states[0]),
    make_hwstate(200001, 0, 1, 1, &finger_states[1]),
    make_hwstate(200001, 0, 2, 2, &finger_states[1]),
    make_hwstate(200001, 0, 2, 2, &finger_states[2]),
  };

  EXPECT_TRUE(hardware_state[0].SameFingersAs(hardware_state[1]));
  EXPECT_FALSE(hardware_state[0].SameFingersAs(hardware_state[2]));
  EXPECT_TRUE(hardware_state[2].SameFingersAs(hardware_state[2]));
  EXPECT_FALSE(hardware_state[2].SameFingersAs(hardware_state[3]));
}

TEST(GesturesTest, GestureStringTest) {
  Gesture null;
  EXPECT_TRUE(strstr(null.String().c_str(), "null"));

  Gesture move(kGestureMove, 1.0, 2.0, 3.0, 4.0);
  EXPECT_TRUE(strstr(move.String().c_str(), "1"));
  EXPECT_TRUE(strstr(move.String().c_str(), "2"));
  EXPECT_TRUE(strstr(move.String().c_str(), "3"));
  EXPECT_TRUE(strstr(move.String().c_str(), "4"));

  Gesture scroll(kGestureScroll, 1.0, 2.0, 3.0, 4.0);
  EXPECT_TRUE(strstr(scroll.String().c_str(), "1"));
  EXPECT_TRUE(strstr(scroll.String().c_str(), "2"));
  EXPECT_TRUE(strstr(scroll.String().c_str(), "3"));
  EXPECT_TRUE(strstr(scroll.String().c_str(), "4"));

  Gesture buttons(kGestureButtonsChange, 1.0, 2.0, 3, 4, false);
  EXPECT_TRUE(strstr(buttons.String().c_str(), "1"));
  EXPECT_TRUE(strstr(buttons.String().c_str(), "2"));
  EXPECT_TRUE(strstr(buttons.String().c_str(), "3"));
  EXPECT_TRUE(strstr(buttons.String().c_str(), "4"));

  Gesture mousewheel(kGestureMouseWheel, 1.0, 2.0, 3.0, 4.0, 3, 4);
  EXPECT_TRUE(strstr(mousewheel.String().c_str(), "1"));
  EXPECT_TRUE(strstr(mousewheel.String().c_str(), "2"));
  EXPECT_TRUE(strstr(mousewheel.String().c_str(), "3"));
  EXPECT_TRUE(strstr(mousewheel.String().c_str(), "4"));

  Gesture pinch(kGesturePinch, 1.0, 2.0, 3.0, 4.0);
  EXPECT_TRUE(strstr(pinch.String().c_str(), "1"));
  EXPECT_TRUE(strstr(pinch.String().c_str(), "2"));
  EXPECT_TRUE(strstr(pinch.String().c_str(), "3"));
  EXPECT_TRUE(strstr(pinch.String().c_str(), "4"));

  Gesture swipe(kGestureSwipe, 1.0, 2.0, 3.0, 4.0);
  EXPECT_TRUE(strstr(swipe.String().c_str(), "1"));
  EXPECT_TRUE(strstr(swipe.String().c_str(), "2"));
  EXPECT_TRUE(strstr(swipe.String().c_str(), "3"));
  EXPECT_TRUE(strstr(swipe.String().c_str(), "4"));

  Gesture swipelift(kGestureSwipeLift, 1.0, 2.0);
  EXPECT_TRUE(strstr(swipelift.String().c_str(), "1"));
  EXPECT_TRUE(strstr(swipelift.String().c_str(), "2"));

  Gesture swipe4f(kGestureFourFingerSwipe, 1.0, 2.0, 3.0, 4.0);
  EXPECT_TRUE(strstr(swipe4f.String().c_str(), "1"));
  EXPECT_TRUE(strstr(swipe4f.String().c_str(), "2"));
  EXPECT_TRUE(strstr(swipe4f.String().c_str(), "3"));
  EXPECT_TRUE(strstr(swipe4f.String().c_str(), "4"));

  Gesture swipe4flift(kGestureFourFingerSwipeLift, 1.0, 2.0);
  EXPECT_TRUE(strstr(swipe4flift.String().c_str(), "1"));
  EXPECT_TRUE(strstr(swipe4flift.String().c_str(), "2"));

  Gesture metrics(kGestureMetrics, 1.0, 2.0,
                  kGestureMetricsTypeMouseMovement, 3.0, 4.0);
  EXPECT_TRUE(strstr(metrics.String().c_str(), "1"));
  EXPECT_TRUE(strstr(metrics.String().c_str(), "2"));

  Gesture contact_initiated;
  contact_initiated.type = kGestureTypeContactInitiated;
  EXPECT_TRUE(strstr(contact_initiated.String().c_str(), "nitiated"));
}

TEST(GesturesTest, GestureEqTest) {
  Gesture null;
  Gesture null2;
  EXPECT_TRUE(null == null2);
  EXPECT_FALSE(null != null2);

  Gesture move(kGestureMove, 1.0, 2.0, 3.0, 4.0);
  Gesture move2(kGestureMove, 1.0, 2.0, 3.0, 4.0);
  Gesture move_ne0(kGestureMove, 9.0, 2.0, 3.0, 4.0);
  Gesture move_ne1(kGestureMove, 1.0, 9.0, 3.0, 4.0);
  Gesture move_ne2(kGestureMove, 1.0, 2.0, 9.0, 4.0);
  Gesture move_ne3(kGestureMove, 1.0, 2.0, 3.0, 9.0);
  EXPECT_TRUE(move == move2);
  EXPECT_FALSE(move == move_ne0);
  EXPECT_FALSE(move == move_ne1);
  EXPECT_FALSE(move == move_ne2);
  EXPECT_FALSE(move == move_ne3);
  EXPECT_FALSE(move != move2);
  EXPECT_TRUE(move != move_ne0);
  EXPECT_TRUE(move != move_ne1);
  EXPECT_TRUE(move != move_ne2);
  EXPECT_TRUE(move != move_ne3);

  Gesture scroll(kGestureScroll, 1.0, 2.0, 3.0, 4.0);
  Gesture scroll2(kGestureScroll, 1.0, 2.0, 3.0, 4.0);
  Gesture scroll_ne0(kGestureScroll, 9.0, 2.0, 3.0, 4.0);
  Gesture scroll_ne1(kGestureScroll, 1.0, 9.0, 3.0, 4.0);
  Gesture scroll_ne2(kGestureScroll, 1.0, 2.0, 9.0, 4.0);
  Gesture scroll_ne3(kGestureScroll, 1.0, 2.0, 3.0, 9.0);
  EXPECT_TRUE(scroll == scroll2);
  EXPECT_FALSE(scroll == scroll_ne0);
  EXPECT_FALSE(scroll == scroll_ne1);
  EXPECT_FALSE(scroll == scroll_ne2);
  EXPECT_FALSE(scroll == scroll_ne3);
  EXPECT_FALSE(scroll != scroll2);
  EXPECT_TRUE(scroll != scroll_ne0);
  EXPECT_TRUE(scroll != scroll_ne1);
  EXPECT_TRUE(scroll != scroll_ne2);
  EXPECT_TRUE(scroll != scroll_ne3);

  Gesture buttons(kGestureButtonsChange, 1.0, 2.0, 3, 4, false);
  Gesture buttons2(kGestureButtonsChange, 1.0, 2.0, 3, 4, false);
  Gesture buttons_ne0(kGestureButtonsChange, 9.0, 2.0, 3, 4, false);
  Gesture buttons_ne1(kGestureButtonsChange, 1.0, 9.0, 3, 4, false);
  Gesture buttons_ne2(kGestureButtonsChange, 1.0, 2.0, 9, 4, false);
  Gesture buttons_ne3(kGestureButtonsChange, 1.0, 2.0, 3, 9, false);
  EXPECT_TRUE(buttons == buttons2);
  EXPECT_FALSE(buttons == buttons_ne0);
  EXPECT_FALSE(buttons == buttons_ne1);
  EXPECT_FALSE(buttons == buttons_ne2);
  EXPECT_FALSE(buttons == buttons_ne3);
  EXPECT_FALSE(buttons != buttons2);
  EXPECT_TRUE(buttons != buttons_ne0);
  EXPECT_TRUE(buttons != buttons_ne1);
  EXPECT_TRUE(buttons != buttons_ne2);
  EXPECT_TRUE(buttons != buttons_ne3);

  Gesture fling(kGestureFling, 1.0, 2.0, 3.0, 4.0, GESTURES_FLING_START);
  Gesture fling2(kGestureFling, 1.0, 2.0, 3.0, 4.0, GESTURES_FLING_TAP_DOWN);
  Gesture fling_ne0(kGestureFling, 1.0, 2.0, 5.0, 4.0, GESTURES_FLING_START);
  Gesture fling_ne1(kGestureFling, 1.0, 2.0, 3.0, 5.0, GESTURES_FLING_START);
  Gesture fling_ne2(kGestureFling, 5.0, 2.0, 3.0, 4.0, GESTURES_FLING_START);
  Gesture fling_ne3(kGestureFling, 1.0, 5.0, 3.0, 4.0, GESTURES_FLING_START);
  EXPECT_TRUE(fling == fling2);
  EXPECT_FALSE(fling == fling_ne0);
  EXPECT_FALSE(fling == fling_ne1);
  EXPECT_FALSE(fling == fling_ne2);
  EXPECT_FALSE(fling == fling_ne3);
  EXPECT_FALSE(fling != fling2);
  EXPECT_TRUE(fling != fling_ne0);
  EXPECT_TRUE(fling != fling_ne1);
  EXPECT_TRUE(fling != fling_ne2);
  EXPECT_TRUE(fling != fling_ne3);

  Gesture contact_initiated;
  contact_initiated.type = kGestureTypeContactInitiated;
  Gesture contact_initiated2;
  contact_initiated2.type = kGestureTypeContactInitiated;
  EXPECT_TRUE(contact_initiated == contact_initiated2);
  EXPECT_FALSE(contact_initiated != contact_initiated2);

  Gesture wheelmouse(kGestureMouseWheel, 1.0, 2.0, 3.0, 4.0, 3, 4);
  Gesture wheelmouse2(kGestureMouseWheel, 1.0, 2.0, 3.0, 4.0, 3, 4);
  Gesture wheelmouse_ne0(kGestureMouseWheel, 9.0, 2.0, 3.0, 4.0, 3, 4);
  Gesture wheelmouse_ne1(kGestureMouseWheel, 1.0, 9.0, 3.0, 4.0, 3, 4);
  Gesture wheelmouse_ne2(kGestureMouseWheel, 1.0, 2.0, 9.0, 4.0, 3, 4);
  Gesture wheelmouse_ne3(kGestureMouseWheel, 1.0, 2.0, 3.0, 9.0, 3, 4);
  Gesture wheelmouse_ne4(kGestureMouseWheel, 1.0, 2.0, 3.0, 4.0, 9, 4);
  Gesture wheelmouse_ne5(kGestureMouseWheel, 1.0, 2.0, 3.0, 4.0, 3, 9);
  EXPECT_TRUE(wheelmouse == wheelmouse2);
  EXPECT_FALSE(wheelmouse == wheelmouse_ne0);
  EXPECT_FALSE(wheelmouse == wheelmouse_ne1);
  EXPECT_FALSE(wheelmouse == wheelmouse_ne2);
  EXPECT_FALSE(wheelmouse == wheelmouse_ne3);
  EXPECT_FALSE(wheelmouse == wheelmouse_ne4);
  EXPECT_FALSE(wheelmouse == wheelmouse_ne5);
  EXPECT_FALSE(wheelmouse != wheelmouse2);
  EXPECT_TRUE(wheelmouse != wheelmouse_ne0);
  EXPECT_TRUE(wheelmouse != wheelmouse_ne1);
  EXPECT_TRUE(wheelmouse != wheelmouse_ne2);
  EXPECT_TRUE(wheelmouse != wheelmouse_ne3);
  EXPECT_TRUE(wheelmouse != wheelmouse_ne4);
  EXPECT_TRUE(wheelmouse != wheelmouse_ne5);

  Gesture pinch(kGesturePinch, 1.0, 2.0, 3.0, 4.0);
  Gesture pinch2(kGesturePinch, 1.0, 2.0, 3.0, 4.0);
  Gesture pinch_ne0(kGesturePinch, 9.0, 2.0, 3.0, 4.0);
  Gesture pinch_ne1(kGesturePinch, 1.0, 9.0, 3.0, 4.0);
  Gesture pinch_ne2(kGesturePinch, 1.0, 2.0, 9.0, 4.0);
  EXPECT_TRUE(pinch == pinch2);
  EXPECT_FALSE(pinch == pinch_ne0);
  EXPECT_FALSE(pinch == pinch_ne1);
  EXPECT_FALSE(pinch == pinch_ne2);
  EXPECT_FALSE(pinch != pinch2);
  EXPECT_TRUE(pinch != pinch_ne0);
  EXPECT_TRUE(pinch != pinch_ne1);
  EXPECT_TRUE(pinch != pinch_ne2);

  Gesture swipe(kGestureSwipe, 1.0, 2.0, 3.0, 4.0);
  Gesture swipe2(kGestureSwipe, 1.0, 2.0, 3.0, 4.0);
  Gesture swipe_ne0(kGestureSwipe, 9.0, 2.0, 3.0, 4.0);
  Gesture swipe_ne1(kGestureSwipe, 1.0, 9.0, 3.0, 4.0);
  Gesture swipe_ne2(kGestureSwipe, 1.0, 2.0, 9.0, 4.0);
  EXPECT_TRUE(swipe == swipe2);
  EXPECT_FALSE(swipe == swipe_ne0);
  EXPECT_FALSE(swipe == swipe_ne1);
  EXPECT_FALSE(swipe == swipe_ne2);
  EXPECT_FALSE(swipe != swipe2);
  EXPECT_TRUE(swipe != swipe_ne0);
  EXPECT_TRUE(swipe != swipe_ne1);
  EXPECT_TRUE(swipe != swipe_ne2);

  Gesture swipelift(kGestureSwipeLift, 1.0, 2.0);
  Gesture swipelift2(kGestureSwipeLift, 1.0, 2.0);
  Gesture swipelift_ne0(kGestureSwipeLift, 9.0, 2.0);
  Gesture swipelift_ne1(kGestureSwipeLift, 1.0, 9.0);
  EXPECT_TRUE(swipelift == swipelift2);
  EXPECT_FALSE(swipelift == swipelift_ne0);
  EXPECT_FALSE(swipelift == swipelift_ne1);
  EXPECT_FALSE(swipelift != swipelift2);
  EXPECT_TRUE(swipelift != swipelift_ne0);
  EXPECT_TRUE(swipelift != swipelift_ne1);

  Gesture swipe4f(kGestureFourFingerSwipe, 1.0, 2.0, 3.0, 4.0);
  Gesture swipe4f2(kGestureFourFingerSwipe, 1.0, 2.0, 3.0, 4.0);
  Gesture swipe4f_ne0(kGestureFourFingerSwipe, 9.0, 2.0, 3.0, 4.0);
  Gesture swipe4f_ne1(kGestureFourFingerSwipe, 1.0, 9.0, 3.0, 4.0);
  Gesture swipe4f_ne2(kGestureFourFingerSwipe, 1.0, 2.0, 9.0, 4.0);
  EXPECT_TRUE(swipe4f == swipe4f2);
  EXPECT_FALSE(swipe4f == swipe4f_ne0);
  EXPECT_FALSE(swipe4f == swipe4f_ne1);
  EXPECT_FALSE(swipe4f == swipe4f_ne2);
  EXPECT_FALSE(swipe4f != swipe4f2);
  EXPECT_TRUE(swipe4f != swipe4f_ne0);
  EXPECT_TRUE(swipe4f != swipe4f_ne1);
  EXPECT_TRUE(swipe4f != swipe4f_ne2);

  Gesture swipe4flift(kGestureFourFingerSwipeLift, 1.0, 2.0);
  Gesture swipe4flift2(kGestureFourFingerSwipeLift, 1.0, 2.0);
  Gesture swipe4flift_ne0(kGestureFourFingerSwipeLift, 9.0, 2.0);
  Gesture swipe4flift_ne1(kGestureFourFingerSwipeLift, 1.0, 9.0);
  EXPECT_TRUE(swipe4flift == swipe4flift2);
  EXPECT_FALSE(swipe4flift == swipe4flift_ne0);
  EXPECT_FALSE(swipe4flift == swipe4flift_ne1);
  EXPECT_FALSE(swipe4flift != swipe4flift2);
  EXPECT_TRUE(swipe4flift != swipe4flift_ne0);
  EXPECT_TRUE(swipe4flift != swipe4flift_ne1);

  Gesture metrics(kGestureMetrics, 1.0, 2.0,
                  kGestureMetricsTypeMouseMovement, 3.0, 4.0);
  Gesture metrics2(kGestureMetrics, 1.0, 2.0,
                  kGestureMetricsTypeMouseMovement, 3.0, 4.0);
  Gesture metrics_ne0(kGestureMetrics, 9.0, 2.0,
                  kGestureMetricsTypeMouseMovement, 3.0, 4.0);
  Gesture metrics_ne1(kGestureMetrics, 1.0, 9.0,
                  kGestureMetricsTypeMouseMovement, 3.0, 4.0);
  Gesture metrics_ne2(kGestureMetrics, 1.0, 2.0,
                  kGestureMetricsTypeNoisyGround, 3.0, 4.0);
  Gesture metrics_ne3(kGestureMetrics, 1.0, 2.0,
                  kGestureMetricsTypeMouseMovement, 9.0, 4.0);
  Gesture metrics_ne4(kGestureMetrics, 1.0, 2.0,
                  kGestureMetricsTypeMouseMovement, 3.0, 9.0);
  EXPECT_TRUE(metrics == metrics2);
  EXPECT_FALSE(metrics == metrics_ne0);
  EXPECT_FALSE(metrics == metrics_ne1);
  EXPECT_FALSE(metrics == metrics_ne2);
  EXPECT_FALSE(metrics == metrics_ne3);
  EXPECT_FALSE(metrics == metrics_ne4);
  EXPECT_FALSE(metrics != metrics2);
  EXPECT_TRUE(metrics != metrics_ne0);
  EXPECT_TRUE(metrics != metrics_ne1);
  EXPECT_TRUE(metrics != metrics_ne2);
  EXPECT_TRUE(metrics != metrics_ne3);
  EXPECT_TRUE(metrics != metrics_ne4);

  // Compare different types, should all fail to equate
  Gesture* gs[] = { &null, &move, &scroll, &buttons, &contact_initiated };
  for (size_t i = 0; i < arraysize(gs); ++i) {
    for (size_t j = 0; j < arraysize(gs); ++j) {
      if (i == j)
        continue;
      EXPECT_FALSE(*gs[i] == *gs[j]) << "i=" << i << ", j=" << j;
      EXPECT_TRUE(*gs[i] != *gs[j]) << "i=" << i << ", j=" << j;
    }
  }
}

TEST(GesturesTest, SimpleTest) {
  // Simple allocate/free test
  std::unique_ptr<GestureInterpreter> gs(NewGestureInterpreter());
  EXPECT_NE(nullptr, gs.get());
  EXPECT_EQ(nullptr, gs.get()->interpreter());

  GestureInterpreter* gs_version_under = NewGestureInterpreterImpl(0);
  EXPECT_EQ(nullptr, gs_version_under);
  GestureInterpreter* gs_version_over = NewGestureInterpreterImpl(1000);
  EXPECT_EQ(nullptr, gs_version_over);

  GestureInterpreter* gs_ptr = NewGestureInterpreter();
  EXPECT_NE(nullptr, gs_ptr);
  gs_ptr->Initialize(GESTURES_DEVCLASS_TOUCHPAD);
  DeleteGestureInterpreter(gs_ptr);

  gs_ptr = NewGestureInterpreter();
  EXPECT_NE(nullptr, gs_ptr);
  gs_ptr->Initialize(GESTURES_DEVCLASS_TOUCHSCREEN);
  DeleteGestureInterpreter(gs_ptr);

  gs_ptr = NewGestureInterpreter();
  EXPECT_NE(nullptr, gs_ptr);
  gs_ptr->Initialize(GESTURES_DEVCLASS_MOUSE);
  DeleteGestureInterpreter(gs_ptr);

  gs_ptr = NewGestureInterpreter();
  EXPECT_NE(nullptr, gs_ptr);
  gs_ptr->Initialize(GESTURES_DEVCLASS_POINTING_STICK);
  DeleteGestureInterpreter(gs_ptr);

  gs_ptr = NewGestureInterpreter();
  EXPECT_NE(nullptr, gs_ptr);
  gs_ptr->Initialize(GESTURES_DEVCLASS_MULTITOUCH_MOUSE);
  std::string activity = gs_ptr->EncodeActivityLog();
  EXPECT_NE(activity.size(), 0);
  DeleteGestureInterpreter(gs_ptr);

  EXPECT_EQ("1073741824", FingerState::FlagsString(1 << 30));
}

TEST(GesturesTest, CtorTest) {
  Gesture move_gs(kGestureMove, 2, 3, 4.0, 5.0);
  EXPECT_EQ(move_gs.type, kGestureTypeMove);
  EXPECT_EQ(move_gs.start_time, 2);
  EXPECT_EQ(move_gs.end_time, 3);
  EXPECT_EQ(move_gs.details.move.dx, 4.0);
  EXPECT_EQ(move_gs.details.move.dy, 5.0);

  Gesture scroll_gs(kGestureScroll, 2, 3, 4.0, 5.0);
  EXPECT_EQ(scroll_gs.type, kGestureTypeScroll);
  EXPECT_EQ(scroll_gs.start_time, 2);
  EXPECT_EQ(scroll_gs.end_time, 3);
  EXPECT_EQ(scroll_gs.details.scroll.dx, 4.0);
  EXPECT_EQ(scroll_gs.details.scroll.dy, 5.0);

  Gesture bdown_gs(kGestureButtonsChange, 2, 3, GESTURES_BUTTON_LEFT, 0, false);
  EXPECT_EQ(bdown_gs.type, kGestureTypeButtonsChange);
  EXPECT_EQ(bdown_gs.start_time, 2);
  EXPECT_EQ(bdown_gs.end_time, 3);
  EXPECT_EQ(bdown_gs.details.buttons.down, GESTURES_BUTTON_LEFT);
  EXPECT_EQ(bdown_gs.details.buttons.up, 0);

  Gesture bup_gs(kGestureButtonsChange, 2, 3, 0, GESTURES_BUTTON_LEFT, false);
  EXPECT_EQ(bup_gs.type, kGestureTypeButtonsChange);
  EXPECT_EQ(bup_gs.start_time, 2);
  EXPECT_EQ(bup_gs.end_time, 3);
  EXPECT_EQ(bup_gs.details.buttons.down, 0);
  EXPECT_EQ(bup_gs.details.buttons.up, GESTURES_BUTTON_LEFT);

  Gesture bdownup_gs(
      kGestureButtonsChange, 2, 3,
      GESTURES_BUTTON_LEFT, GESTURES_BUTTON_LEFT, false);
  EXPECT_EQ(bdownup_gs.type, kGestureTypeButtonsChange);
  EXPECT_EQ(bdownup_gs.start_time, 2);
  EXPECT_EQ(bdownup_gs.end_time, 3);
  EXPECT_EQ(bdownup_gs.details.buttons.down, GESTURES_BUTTON_LEFT);
  EXPECT_EQ(bdownup_gs.details.buttons.up, GESTURES_BUTTON_LEFT);
}

TEST(GesturesTest, StimeFromTimevalTest) {
  struct timeval tv;
  tv.tv_sec = 3;
  tv.tv_usec = 88;
  EXPECT_DOUBLE_EQ(3.000088, StimeFromTimeval(&tv));
  tv.tv_sec = 2000000000;
  tv.tv_usec = 999999;
  EXPECT_DOUBLE_EQ(2000000000.999999, StimeFromTimeval(&tv));
}

TEST(GesturesTest, StimeFromTimespecTest) {
  struct timespec tv;
  tv.tv_sec = 3;
  tv.tv_nsec = 88;
  EXPECT_DOUBLE_EQ(3.000000088, StimeFromTimespec(&tv));
  tv.tv_sec = 2000000000;
  tv.tv_nsec = 999999999;
  EXPECT_DOUBLE_EQ(2000000000.999999999, StimeFromTimespec(&tv));
}

TEST(GesturesTest, HardwareStateGetFingerStateTest) {
  FingerState fs[] = {
    { 0, 0, 0, 0, 1, 0, 150, 4000, 4, 0 },
    { 0, 0, 0, 0, 1, 0, 550, 2000, 2, 0 },
    { 0, 0, 0, 0, 1, 0, 250, 3000, 7, 0 }
  };
  HardwareState hs = make_hwstate(10000, 0, 3, 3, &fs[0]);
  EXPECT_EQ(&fs[0], hs.GetFingerState(4));
  EXPECT_EQ(&fs[1], hs.GetFingerState(2));
  EXPECT_EQ(&fs[2], hs.GetFingerState(7));
  EXPECT_EQ(nullptr, hs.GetFingerState(8));

  const HardwareState& const_hs = hs;
  EXPECT_EQ(&fs[0], const_hs.GetFingerState(4));
  EXPECT_EQ(&fs[1], const_hs.GetFingerState(2));
  EXPECT_EQ(&fs[2], const_hs.GetFingerState(7));
  EXPECT_EQ(nullptr, hs.GetFingerState(8));
}

TEST(GesturesTest, HardwarePropertiesToStringTest) {
  HardwareProperties hp = {
    .left = 1009.5, .top = 1002.4, .right = 1003.9, .bottom = 1004.5,
    .res_x = 1005.4, .res_y = 1006.9,
    .screen_x_dpi = 1007.4,
    .screen_y_dpi = 1008.5,
    .orientation_minimum = -1,
    .orientation_maximum = 2,
    .max_finger_cnt = 12,
    .max_touch_cnt = 11,
    .supports_t5r2 = 0, .support_semi_mt = 1, .is_button_pad = 1,
    .has_wheel = 0, .wheel_is_hi_res = 0,
    .is_haptic_pad = 0,
  };
  string str = hp.String();
  fprintf(stderr, "str: %s\n", str.c_str());
  // expect all these numbers in order
  const char* expected[] = {
    "1009.5",
    "1002.4",
    "1003.9",
    "1004.5",
    "1005.4",
    "1006.9",
    "1007.4",
    "1008.5",
    "12,",
    "11,",
    "0,",
    "1,",
    "1 "
  };
  const char* last_found = str.c_str();
  for (size_t i = 0; i < arraysize(expected); i++) {
    ASSERT_NE(nullptr, last_found);
    const char* found = strstr(last_found, expected[i]);
    EXPECT_GE(found, last_found) << "i=" << i;
    last_found = found;
  }
}

TEST(GesturesTest, HardwareStateToStringTest) {
  FingerState fs[] = {
    { 1.0, 2.0, 3.0, 4.5, 30.0, 11.0, 20.0, 30.0, 14,
      GESTURES_FINGER_WARP_Y_NON_MOVE | GESTURES_FINGER_PALM },
    { 1.5, 2.5, 3.5, 5.0, 30.5, 11.5, 20.5, 30.5, 15,
      GESTURES_FINGER_WARP_X_NON_MOVE }
  };

  HardwareState hs[] = {
    make_hwstate(1.123, 1, 2, 2, fs),
    make_hwstate(2.123, 0, 0, 0, nullptr)
  };

  const char* expected[] = {
    "1.0",
    "2.0",
    "3.0",
    "4.5",
    "30.0",
    "11.0",
    "20.0",
    "30.0",
    "14",
    "GESTURES_FINGER_WARP_Y_NON_MOVE",
    "GESTURES_FINGER_PALM",
    "1.5",
    "2.5",
    "3.5",
    "5.0",
    "30.5",
    "11.5",
    "20.5",
    "30.5",
    "15",
    "GESTURES_FINGER_WARP_X_NON_MOVE",
    "1.123",
    "1, 2, 2"
  };
  const char* short_expected[] = {
    "2.123",
    "0, 0, 0",
    "{}"
  };
  string long_str = hs[0].String();
  string short_str = hs[1].String();

  for (size_t i = 0; i < arraysize(expected); i++)
    EXPECT_NE(nullptr, strstr(long_str.c_str(), expected[i]))
        << " str: " << expected[i];
  for (size_t i = 0; i < arraysize(short_expected); i++)
    EXPECT_NE(nullptr, strstr(short_str.c_str(), short_expected[i]))
        << " str: " << short_expected[i];

  return;
}

}  // namespace gestures