Toggle spoken feedback if two fingers are held down.

ui/chromeos/touch_accessibility_enabler_unittest.cc

+// Copyright 2016 The Chromium 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 "ui/chromeos/touch_accessibility_enabler.h"
+
+#include "base/macros.h"
+#include "base/test/simple_test_tick_clock.h"
+#include "base/time/time.h"
+#include "ui/aura/test/aura_test_base.h"
+#include "ui/aura/window.h"
+#include "ui/events/event.h"
+#include "ui/events/event_utils.h"
+#include "ui/events/gestures/gesture_provider_aura.h"
+#include "ui/events/test/event_generator.h"
+#include "ui/events/test/events_test_utils.h"
+#include "ui/gfx/geometry/point.h"
+
+namespace ui {
+
+namespace {
+
+class MockTouchAccessibilityEnablerDelegate
+    : public ui::TouchAccessibilityEnablerDelegate {
+ public:
+  void PlaySpokenFeedbackToggleCountdown(int tick_count) override {
+    ++feedback_progress_sound_count_;
+  }
+  void ToggleSpokenFeedback() override { toggle_spoken_feedback_ = true; }
+
+  size_t feedback_progress_sound_count() const {
+    return feedback_progress_sound_count_;
+  }
+  bool toggle_spoken_feedback() const { return toggle_spoken_feedback_; }
+
+ private:
+  size_t feedback_progress_sound_count_ = 0;
+  bool toggle_spoken_feedback_ = false;
+};
+
+class TouchAccessibilityEnablerTest : public aura::test::AuraTestBase {
+ public:
+  TouchAccessibilityEnablerTest() {}
+  ~TouchAccessibilityEnablerTest() override {}
+
+  void SetUp() override {
+    aura::test::AuraTestBase::SetUp();
+
+    generator_.reset(new test::EventGenerator(root_window()));
+
+    simulated_clock_ = new base::SimpleTestTickClock();
+    // Tests fail if time is ever 0.
+    simulated_clock_->Advance(base::TimeDelta::FromMilliseconds(10));
+    // ui takes ownership of the tick clock.
+    ui::SetEventTickClockForTesting(
+        std::unique_ptr<base::TickClock>(simulated_clock_));
+
+    enabler_.reset(new TouchAccessibilityEnabler(root_window(), &delegate_));
+  }
+
+  void TearDown() override {
+    enabler_.reset(nullptr);
+    ui::SetEventTickClockForTesting(nullptr);
+    aura::test::AuraTestBase::TearDown();
+  }
+
+ protected:
+  base::TimeTicks Now() {
+    // This is the same as what EventTimeForNow() does, but here we do it
+    // with our simulated clock.
+    return simulated_clock_->NowTicks();
+  }
+
+  std::unique_ptr<test::EventGenerator> generator_;
+  // Owned by |ui|.
+  base::SimpleTestTickClock* simulated_clock_ = nullptr;
+  MockTouchAccessibilityEnablerDelegate delegate_;
+  std::unique_ptr<TouchAccessibilityEnabler> enabler_;
+  ui::GestureDetector::Config gesture_detector_config_;
+
+  DISALLOW_COPY_AND_ASSIGN(TouchAccessibilityEnablerTest);
+};
+
+}  // namespace
+
+TEST_F(TouchAccessibilityEnablerTest, EntersOneFingerDownMode) {
+  EXPECT_TRUE(enabler_->IsInNoFingersDownForTesting());
+  EXPECT_FALSE(enabler_->IsInOneFingerDownForTesting());
+  generator_->set_current_location(gfx::Point(11, 12));
+  generator_->PressTouch();
+
+  EXPECT_FALSE(enabler_->IsInNoFingersDownForTesting());
+  EXPECT_TRUE(enabler_->IsInOneFingerDownForTesting());
+}
+
+TEST_F(TouchAccessibilityEnablerTest, EntersTwoFingersDownMode) {
+  EXPECT_TRUE(enabler_->IsInNoFingersDownForTesting());
+  generator_->set_current_location(gfx::Point(11, 12));
+  generator_->PressTouchId(1);
+
+  generator_->set_current_location(gfx::Point(22, 34));
+  generator_->PressTouchId(2);
+
+  EXPECT_TRUE(enabler_->IsInTwoFingersDownForTesting());
+}
+
+TEST_F(TouchAccessibilityEnablerTest, PlaysProgressSound) {
+  EXPECT_TRUE(enabler_->IsInNoFingersDownForTesting());
+  generator_->set_current_location(gfx::Point(11, 12));
+  generator_->PressTouchId(1);
+
+  generator_->set_current_location(gfx::Point(22, 34));
+  generator_->PressTouchId(2);
+
+  EXPECT_TRUE(enabler_->IsInTwoFingersDownForTesting());
+  EXPECT_EQ(0U, delegate_.feedback_progress_sound_count());
+
+  enabler_->TriggerOnTimerForTesting();
+  EXPECT_EQ(0U, delegate_.feedback_progress_sound_count());
+
+  simulated_clock_->Advance(base::TimeDelta::FromMilliseconds(500));
+  enabler_->TriggerOnTimerForTesting();
+  EXPECT_EQ(1U, delegate_.feedback_progress_sound_count());
+}
+
+TEST_F(TouchAccessibilityEnablerTest, TogglesSpokenFeedback) {
+  EXPECT_TRUE(enabler_->IsInNoFingersDownForTesting());
+  generator_->set_current_location(gfx::Point(11, 12));
+  generator_->PressTouchId(1);
+
+  generator_->set_current_location(gfx::Point(22, 34));
+  generator_->PressTouchId(2);
+
+  EXPECT_TRUE(enabler_->IsInTwoFingersDownForTesting());
+  EXPECT_FALSE(delegate_.toggle_spoken_feedback());
+
+  enabler_->TriggerOnTimerForTesting();
+  EXPECT_FALSE(delegate_.toggle_spoken_feedback());
+
+  simulated_clock_->Advance(base::TimeDelta::FromMilliseconds(3500));
+  enabler_->TriggerOnTimerForTesting();
+  EXPECT_TRUE(delegate_.toggle_spoken_feedback());
+}
+
+TEST_F(TouchAccessibilityEnablerTest, ThreeFingersCancelsDetection) {
+  EXPECT_TRUE(enabler_->IsInNoFingersDownForTesting());
+  generator_->set_current_location(gfx::Point(11, 12));
+  generator_->PressTouchId(1);
+
+  generator_->set_current_location(gfx::Point(22, 34));
+  generator_->PressTouchId(2);
+
+  EXPECT_TRUE(enabler_->IsInTwoFingersDownForTesting());
+
+  generator_->set_current_location(gfx::Point(33, 56));
+  generator_->PressTouchId(3);
+
+  EXPECT_TRUE(enabler_->IsInWaitForNoFingersForTesting());
+}
+
+TEST_F(TouchAccessibilityEnablerTest, MovingFingerPastSlopCancelsDetection) {
+  EXPECT_TRUE(enabler_->IsInNoFingersDownForTesting());
+  generator_->set_current_location(gfx::Point(11, 12));
+  generator_->PressTouch();
+
+  int slop = gesture_detector_config_.double_tap_slop;
+  int half_slop = slop / 2;
+
+  generator_->MoveTouch(gfx::Point(11 + half_slop, 12));
+  EXPECT_TRUE(enabler_->IsInOneFingerDownForTesting());
+
+  generator_->MoveTouch(gfx::Point(11 + slop + 1, 12));
+  EXPECT_TRUE(enabler_->IsInWaitForNoFingersForTesting());
+}
+
+}  // namespace ui