Merge "Added External Display settings page" into main

2024-06-25 15:01:01 +00:00
parent d303afbbd7 a6016e6552
commit b3926bdf35
20 changed files with 2708 additions and 16 deletions
--- a/tests/robotests/src/com/android/settings/connecteddevice/ConnectedDeviceGroupControllerTest.java
+++ b/tests/robotests/src/com/android/settings/connecteddevice/ConnectedDeviceGroupControllerTest.java
@@ -17,6 +17,8 @@ package com.android.settings.connecteddevice;

 import static com.android.settings.core.BasePreferenceController.AVAILABLE_UNSEARCHABLE;
 import static com.android.settings.core.BasePreferenceController.UNSUPPORTED_ON_DEVICE;
+import static com.android.settings.flags.Flags.FLAG_RESOLUTION_AND_ENABLE_CONNECTED_DISPLAY_SETTING;
+import static com.android.settings.flags.Flags.FLAG_ROTATION_CONNECTED_DISPLAY_SETTING;

 import static com.google.common.truth.Truth.assertThat;

@@ -30,6 +32,7 @@ import static org.mockito.Mockito.when;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.content.pm.PackageManager;
+import android.content.res.Resources;
 import android.hardware.input.InputManager;
 import android.platform.test.annotations.EnableFlags;
 import android.platform.test.flag.junit.SetFlagsRule;
@@ -40,13 +43,16 @@ import androidx.preference.Preference;
 import androidx.preference.PreferenceGroup;
 import androidx.preference.PreferenceManager;
 import androidx.preference.PreferenceScreen;
+import androidx.test.core.app.ApplicationProvider;

 import com.android.settings.bluetooth.ConnectedBluetoothDeviceUpdater;
 import com.android.settings.bluetooth.Utils;
+import com.android.settings.connecteddevice.display.ExternalDisplayUpdater;
 import com.android.settings.connecteddevice.dock.DockUpdater;
 import com.android.settings.connecteddevice.stylus.StylusDeviceUpdater;
 import com.android.settings.connecteddevice.usb.ConnectedUsbDeviceUpdater;
 import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.flags.FakeFeatureFlagsImpl;
 import com.android.settings.flags.Flags;
 import com.android.settings.testutils.shadow.ShadowBluetoothAdapter;
 import com.android.settings.testutils.shadow.ShadowBluetoothUtils;
@@ -65,7 +71,6 @@ import org.mockito.Answers;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
-import org.robolectric.RuntimeEnvironment;
 import org.robolectric.Shadows;
 import org.robolectric.annotation.Config;
 import org.robolectric.shadows.ShadowApplicationPackageManager;
@@ -84,6 +89,8 @@ public class ConnectedDeviceGroupControllerTest {
    @Mock
    private DashboardFragment mDashboardFragment;
    @Mock
+    private ExternalDisplayUpdater mExternalDisplayUpdater;
+    @Mock
    private ConnectedBluetoothDeviceUpdater mConnectedBluetoothDeviceUpdater;
    @Mock
    private ConnectedUsbDeviceUpdater mConnectedUsbDeviceUpdater;
@@ -105,6 +112,9 @@ public class ConnectedDeviceGroupControllerTest {
    private CachedBluetoothDevice mCachedDevice;
    @Mock
    private BluetoothDevice mDevice;
+    @Mock
+    private Resources mResources;
+    private final FakeFeatureFlagsImpl mFakeFeatureFlags = new FakeFeatureFlagsImpl();

    private ShadowApplicationPackageManager mPackageManager;
    private PreferenceGroup mPreferenceGroup;
@@ -118,8 +128,10 @@ public class ConnectedDeviceGroupControllerTest {
    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
+        mFakeFeatureFlags.setFlag(FLAG_ROTATION_CONNECTED_DISPLAY_SETTING, true);
+        mFakeFeatureFlags.setFlag(FLAG_RESOLUTION_AND_ENABLE_CONNECTED_DISPLAY_SETTING, true);

-        mContext = spy(RuntimeEnvironment.application);
+        mContext = spy(ApplicationProvider.getApplicationContext());
        mPreference = new Preference(mContext);
        mPreference.setKey(PREFERENCE_KEY_1);
        mPackageManager = (ShadowApplicationPackageManager) Shadows.shadowOf(
@@ -129,15 +141,19 @@ public class ConnectedDeviceGroupControllerTest {
        doReturn(mContext).when(mDashboardFragment).getContext();
        mPackageManager.setSystemFeature(PackageManager.FEATURE_BLUETOOTH, true);
        when(mContext.getSystemService(InputManager.class)).thenReturn(mInputManager);
+        when(mContext.getResources()).thenReturn(mResources);
        when(mInputManager.getInputDeviceIds()).thenReturn(new int[]{});

        ShadowBluetoothUtils.sLocalBluetoothManager = mLocalBluetoothManager;
        mLocalBluetoothManager = Utils.getLocalBtManager(mContext);
        when(mLocalBluetoothManager.getCachedDeviceManager()).thenReturn(mCachedDeviceManager);

-        mConnectedDeviceGroupController = new ConnectedDeviceGroupController(mContext);
-        mConnectedDeviceGroupController.init(mConnectedBluetoothDeviceUpdater,
-                mConnectedUsbDeviceUpdater, mConnectedDockUpdater, mStylusDeviceUpdater);
+        mConnectedDeviceGroupController = spy(new ConnectedDeviceGroupController(mContext));
+        when(mConnectedDeviceGroupController.getFeatureFlags()).thenReturn(mFakeFeatureFlags);
+
+        mConnectedDeviceGroupController.init(mExternalDisplayUpdater,
+                mConnectedBluetoothDeviceUpdater, mConnectedUsbDeviceUpdater, mConnectedDockUpdater,
+                mStylusDeviceUpdater);
        mConnectedDeviceGroupController.mPreferenceGroup = mPreferenceGroup;

        when(mCachedDevice.getName()).thenReturn(DEVICE_NAME);
@@ -147,6 +163,7 @@ public class ConnectedDeviceGroupControllerTest {

        FeatureFlagUtils.setEnabled(mContext, FeatureFlagUtils.SETTINGS_SHOW_STYLUS_PREFERENCES,
                true);
+        when(mPreferenceScreen.getContext()).thenReturn(mContext);
    }

    @Test
@@ -193,6 +210,7 @@ public class ConnectedDeviceGroupControllerTest {
        // register the callback in onStart()
        mConnectedDeviceGroupController.onStart();

+        verify(mExternalDisplayUpdater).registerCallback();
        verify(mConnectedBluetoothDeviceUpdater).registerCallback();
        verify(mConnectedUsbDeviceUpdater).registerCallback();
        verify(mConnectedDockUpdater).registerCallback();
@@ -204,6 +222,7 @@ public class ConnectedDeviceGroupControllerTest {
    public void onStop_shouldUnregisterUpdaters() {
        // unregister the callback in onStop()
        mConnectedDeviceGroupController.onStop();
+        verify(mExternalDisplayUpdater).unregisterCallback();
        verify(mConnectedBluetoothDeviceUpdater).unregisterCallback();
        verify(mConnectedUsbDeviceUpdater).unregisterCallback();
        verify(mConnectedDockUpdater).unregisterCallback();
@@ -212,22 +231,36 @@ public class ConnectedDeviceGroupControllerTest {

    @Test
    public void getAvailabilityStatus_noBluetoothUsbDockFeature_returnUnSupported() {
+        mFakeFeatureFlags.setFlag(FLAG_ROTATION_CONNECTED_DISPLAY_SETTING, false);
+        mFakeFeatureFlags.setFlag(FLAG_RESOLUTION_AND_ENABLE_CONNECTED_DISPLAY_SETTING, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_BLUETOOTH, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_ACCESSORY, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_HOST, false);
-        mConnectedDeviceGroupController.init(mConnectedBluetoothDeviceUpdater,
+        mConnectedDeviceGroupController.init(null, mConnectedBluetoothDeviceUpdater,
                mConnectedUsbDeviceUpdater, null, null);

        assertThat(mConnectedDeviceGroupController.getAvailabilityStatus()).isEqualTo(
                UNSUPPORTED_ON_DEVICE);
    }

+    @Test
+    public void getAvailabilityStatus_connectedDisplay_returnSupported() {
+        mPackageManager.setSystemFeature(PackageManager.FEATURE_BLUETOOTH, false);
+        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_ACCESSORY, false);
+        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_HOST, false);
+        mConnectedDeviceGroupController.init(null, mConnectedBluetoothDeviceUpdater,
+                mConnectedUsbDeviceUpdater, null, null);
+
+        assertThat(mConnectedDeviceGroupController.getAvailabilityStatus()).isEqualTo(
+                AVAILABLE_UNSEARCHABLE);
+    }
+
    @Test
    public void getAvailabilityStatus_BluetoothFeature_returnSupported() {
        mPackageManager.setSystemFeature(PackageManager.FEATURE_BLUETOOTH, true);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_ACCESSORY, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_HOST, false);
-        mConnectedDeviceGroupController.init(mConnectedBluetoothDeviceUpdater,
+        mConnectedDeviceGroupController.init(null, mConnectedBluetoothDeviceUpdater,
                mConnectedUsbDeviceUpdater, null, null);

        assertThat(mConnectedDeviceGroupController.getAvailabilityStatus()).isEqualTo(
@@ -239,7 +272,7 @@ public class ConnectedDeviceGroupControllerTest {
        mPackageManager.setSystemFeature(PackageManager.FEATURE_BLUETOOTH, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_ACCESSORY, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_HOST, true);
-        mConnectedDeviceGroupController.init(mConnectedBluetoothDeviceUpdater,
+        mConnectedDeviceGroupController.init(null, mConnectedBluetoothDeviceUpdater,
                mConnectedUsbDeviceUpdater, null, null);

        assertThat(mConnectedDeviceGroupController.getAvailabilityStatus()).isEqualTo(
@@ -251,7 +284,7 @@ public class ConnectedDeviceGroupControllerTest {
        mPackageManager.setSystemFeature(PackageManager.FEATURE_BLUETOOTH, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_ACCESSORY, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_HOST, false);
-        mConnectedDeviceGroupController.init(mConnectedBluetoothDeviceUpdater,
+        mConnectedDeviceGroupController.init(null, mConnectedBluetoothDeviceUpdater,
                mConnectedUsbDeviceUpdater, mConnectedDockUpdater, null);

        assertThat(mConnectedDeviceGroupController.getAvailabilityStatus()).isEqualTo(
@@ -261,6 +294,8 @@ public class ConnectedDeviceGroupControllerTest {

    @Test
    public void getAvailabilityStatus_noUsiStylusFeature_returnUnSupported() {
+        mFakeFeatureFlags.setFlag(FLAG_ROTATION_CONNECTED_DISPLAY_SETTING, false);
+        mFakeFeatureFlags.setFlag(FLAG_RESOLUTION_AND_ENABLE_CONNECTED_DISPLAY_SETTING, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_BLUETOOTH, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_ACCESSORY, false);
        mPackageManager.setSystemFeature(PackageManager.FEATURE_USB_HOST, false);
@@ -268,7 +303,7 @@ public class ConnectedDeviceGroupControllerTest {
        when(mInputManager.getInputDevice(0)).thenReturn(new InputDevice.Builder().setSources(
                InputDevice.SOURCE_DPAD).setExternal(false).build());

-        mConnectedDeviceGroupController.init(mConnectedBluetoothDeviceUpdater,
+        mConnectedDeviceGroupController.init(null, mConnectedBluetoothDeviceUpdater,
                mConnectedUsbDeviceUpdater, null, mStylusDeviceUpdater);

        assertThat(mConnectedDeviceGroupController.getAvailabilityStatus()).isEqualTo(
@@ -284,7 +319,7 @@ public class ConnectedDeviceGroupControllerTest {
        when(mInputManager.getInputDevice(0)).thenReturn(new InputDevice.Builder().setSources(
                InputDevice.SOURCE_STYLUS).setExternal(false).build());

-        mConnectedDeviceGroupController.init(mConnectedBluetoothDeviceUpdater,
+        mConnectedDeviceGroupController.init(null, mConnectedBluetoothDeviceUpdater,
                mConnectedUsbDeviceUpdater, mConnectedDockUpdater, mStylusDeviceUpdater);

        assertThat(mConnectedDeviceGroupController.getAvailabilityStatus()).isEqualTo(
--- a/tests/unit/Android.bp
+++ b/tests/unit/Android.bp
@@ -33,6 +33,7 @@ android_test {
        "kotlinx_coroutines_test",
        "Settings-testutils2",
        "MediaDrmSettingsFlagsLib",
+        "servicestests-utils",
        // Don't add SettingsLib libraries here - you can use them directly as they are in the
        // instrumented Settings app.
    ],
--- a/tests/unit/src/com/android/settings/connecteddevice/display/ExternalDisplayPreferenceFragmentTest.java
+++ b/tests/unit/src/com/android/settings/connecteddevice/display/ExternalDisplayPreferenceFragmentTest.java
@@ -0,0 +1,409 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+package com.android.settings.connecteddevice.display;
+
+
+import static android.view.Display.INVALID_DISPLAY;
+
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.PREVIOUSLY_SHOWN_LIST_KEY;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.DISPLAYS_LIST_PREFERENCE_KEY;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_CHANGE_RESOLUTION_FOOTER_RESOURCE;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_NOT_FOUND_FOOTER_RESOURCE;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_RESOLUTION_PREFERENCE_KEY;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_RESOLUTION_TITLE_RESOURCE;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_ROTATION_KEY;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_ROTATION_TITLE_RESOURCE;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_SETTINGS_RESOURCE;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_USE_PREFERENCE_KEY;
+import static com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.EXTERNAL_DISPLAY_USE_TITLE_RESOURCE;
+import static com.android.settingslib.widget.FooterPreference.KEY_FOOTER;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.Display;
+import android.view.View;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceScreen;
+import androidx.test.annotation.UiThreadTest;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.settings.connecteddevice.display.ExternalDisplayPreferenceFragment.DisplayPreference;
+import com.android.settingslib.widget.FooterPreference;
+import com.android.settingslib.widget.MainSwitchPreference;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+
+/** Unit tests for {@link ExternalDisplayPreferenceFragment}.  */
+@RunWith(AndroidJUnit4.class)
+public class ExternalDisplayPreferenceFragmentTest extends ExternalDisplayTestBase {
+    @Nullable
+    private ExternalDisplayPreferenceFragment mFragment;
+    private int mPreferenceIdFromResource;
+    private int mDisplayIdArg = INVALID_DISPLAY;
+    private int mResolutionSelectorDisplayId = INVALID_DISPLAY;
+    @Mock
+    private MetricsLogger mMockedMetricsLogger;
+
+    @Test
+    @UiThreadTest
+    public void testCreateAndStart() {
+        initFragment();
+        assertThat(mPreferenceIdFromResource).isEqualTo(EXTERNAL_DISPLAY_SETTINGS_RESOURCE);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testShowDisplayList() {
+        var fragment = initFragment();
+        var outState = new Bundle();
+        fragment.onSaveInstanceStateCallback(outState);
+        assertThat(outState.getBoolean(PREVIOUSLY_SHOWN_LIST_KEY)).isFalse();
+        assertThat(mHandler.getPendingMessages().size()).isEqualTo(1);
+        PreferenceCategory pref = mPreferenceScreen.findPreference(DISPLAYS_LIST_PREFERENCE_KEY);
+        assertThat(pref).isNull();
+        verify(mMockedInjector, never()).getAllDisplays();
+        mHandler.flush();
+        assertThat(mHandler.getPendingMessages().size()).isEqualTo(0);
+        verify(mMockedInjector).getAllDisplays();
+        pref = mPreferenceScreen.findPreference(DISPLAYS_LIST_PREFERENCE_KEY);
+        assertThat(pref).isNotNull();
+        assertThat(pref.getPreferenceCount()).isEqualTo(2);
+        fragment.onSaveInstanceStateCallback(outState);
+        assertThat(outState.getBoolean(PREVIOUSLY_SHOWN_LIST_KEY)).isTrue();
+    }
+
+    @Test
+    @UiThreadTest
+    public void testLaunchDisplaySettingFromList() {
+        initFragment();
+        mHandler.flush();
+        PreferenceCategory pref = mPreferenceScreen.findPreference(DISPLAYS_LIST_PREFERENCE_KEY);
+        assertThat(pref).isNotNull();
+        DisplayPreference display1Pref = (DisplayPreference) pref.getPreference(0);
+        DisplayPreference display2Pref = (DisplayPreference) pref.getPreference(1);
+        assertThat(display1Pref.getKey()).isEqualTo("display_id_" + 1);
+        assertThat("" + display1Pref.getTitle()).isEqualTo("HDMI");
+        assertThat("" + display1Pref.getSummary()).isEqualTo("1920 x 1080");
+        display1Pref.onPreferenceClick(display1Pref);
+        assertThat(mDisplayIdArg).isEqualTo(1);
+        verify(mMockedMetricsLogger).writePreferenceClickMetric(display1Pref);
+        assertThat(display2Pref.getKey()).isEqualTo("display_id_" + 2);
+        assertThat("" + display2Pref.getTitle()).isEqualTo("Overlay #1");
+        assertThat("" + display2Pref.getSummary()).isEqualTo("1240 x 780");
+        display2Pref.onPreferenceClick(display2Pref);
+        assertThat(mDisplayIdArg).isEqualTo(2);
+        verify(mMockedMetricsLogger).writePreferenceClickMetric(display2Pref);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testShowDisplayListForOnlyOneDisplay_PreviouslyShownList() {
+        var fragment = initFragment();
+        // Previously shown list of displays
+        fragment.onActivityCreatedCallback(createBundleForPreviouslyShownList());
+        // Only one display available
+        doReturn(new Display[] {mDisplays[1]}).when(mMockedInjector).getAllDisplays();
+        mHandler.flush();
+        PreferenceCategory pref = mPreferenceScreen.findPreference(DISPLAYS_LIST_PREFERENCE_KEY);
+        assertThat(pref).isNotNull();
+        assertThat(pref.getPreferenceCount()).isEqualTo(1);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testShowEnabledDisplay_OnlyOneDisplayAvailable() {
+        doReturn(true).when(mMockedInjector).isDisplayEnabled(any());
+        // Only one display available
+        doReturn(new Display[] {mDisplays[1]}).when(mMockedInjector).getAllDisplays();
+        // Init
+        initFragment();
+        mHandler.flush();
+        PreferenceCategory list = mPreferenceScreen.findPreference(DISPLAYS_LIST_PREFERENCE_KEY);
+        assertThat(list).isNull();
+        var pref = mPreferenceScreen.findPreference(EXTERNAL_DISPLAY_RESOLUTION_PREFERENCE_KEY);
+        assertThat(pref).isNotNull();
+        pref = mPreferenceScreen.findPreference(EXTERNAL_DISPLAY_ROTATION_KEY);
+        assertThat(pref).isNotNull();
+        var footerPref = (FooterPreference) mPreferenceScreen.findPreference(KEY_FOOTER);
+        assertThat(footerPref).isNotNull();
+        verify(footerPref).setTitle(EXTERNAL_DISPLAY_CHANGE_RESOLUTION_FOOTER_RESOURCE);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testShowOneEnabledDisplay_FewAvailable() {
+        mDisplayIdArg = 1;
+        doReturn(true).when(mMockedInjector).isDisplayEnabled(any());
+        initFragment();
+        verify(mMockedInjector, never()).getDisplay(anyInt());
+        mHandler.flush();
+        verify(mMockedInjector).getDisplay(mDisplayIdArg);
+        var pref = mPreferenceScreen.findPreference(EXTERNAL_DISPLAY_RESOLUTION_PREFERENCE_KEY);
+        assertThat(pref).isNotNull();
+        pref = mPreferenceScreen.findPreference(EXTERNAL_DISPLAY_ROTATION_KEY);
+        assertThat(pref).isNotNull();
+        var footerPref = (FooterPreference) mPreferenceScreen.findPreference(KEY_FOOTER);
+        assertThat(footerPref).isNotNull();
+        verify(footerPref).setTitle(EXTERNAL_DISPLAY_CHANGE_RESOLUTION_FOOTER_RESOURCE);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testShowDisabledDisplay() {
+        mDisplayIdArg = 1;
+        initFragment();
+        verify(mMockedInjector, never()).getDisplay(anyInt());
+        mHandler.flush();
+        verify(mMockedInjector).getDisplay(mDisplayIdArg);
+        var mainPref = (MainSwitchPreference) mPreferenceScreen.findPreference(
+                EXTERNAL_DISPLAY_USE_PREFERENCE_KEY);
+        assertThat(mainPref).isNotNull();
+        assertThat("" + mainPref.getTitle()).isEqualTo(
+                getText(EXTERNAL_DISPLAY_USE_TITLE_RESOURCE));
+        assertThat(mainPref.isChecked()).isFalse();
+        assertThat(mainPref.isEnabled()).isTrue();
+        assertThat(mainPref.getOnPreferenceChangeListener()).isNotNull();
+        var pref = mPreferenceScreen.findPreference(EXTERNAL_DISPLAY_RESOLUTION_PREFERENCE_KEY);
+        assertThat(pref).isNull();
+        pref = mPreferenceScreen.findPreference(EXTERNAL_DISPLAY_ROTATION_KEY);
+        assertThat(pref).isNull();
+        var footerPref = (FooterPreference) mPreferenceScreen.findPreference(KEY_FOOTER);
+        assertThat(footerPref).isNull();
+    }
+
+    @Test
+    @UiThreadTest
+    public void testNoDisplays() {
+        doReturn(new Display[0]).when(mMockedInjector).getAllDisplays();
+        initFragment();
+        mHandler.flush();
+        var mainPref = (MainSwitchPreference) mPreferenceScreen.findPreference(
+                EXTERNAL_DISPLAY_USE_PREFERENCE_KEY);
+        assertThat(mainPref).isNotNull();
+        assertThat("" + mainPref.getTitle()).isEqualTo(
+                getText(EXTERNAL_DISPLAY_USE_TITLE_RESOURCE));
+        assertThat(mainPref.isChecked()).isFalse();
+        assertThat(mainPref.isEnabled()).isFalse();
+        assertThat(mainPref.getOnPreferenceChangeListener()).isNull();
+        var footerPref = (FooterPreference) mPreferenceScreen.findPreference(KEY_FOOTER);
+        assertThat(footerPref).isNotNull();
+        verify(footerPref).setTitle(EXTERNAL_DISPLAY_NOT_FOUND_FOOTER_RESOURCE);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testDisplayRotationPreference() {
+        mDisplayIdArg = 1;
+        doReturn(true).when(mMockedInjector).isDisplayEnabled(any());
+        var fragment = initFragment();
+        mHandler.flush();
+        var pref = fragment.getRotationPreference(mContext);
+        assertThat(pref.getKey()).isEqualTo(EXTERNAL_DISPLAY_ROTATION_KEY);
+        assertThat("" + pref.getTitle()).isEqualTo(
+                getText(EXTERNAL_DISPLAY_ROTATION_TITLE_RESOURCE));
+        assertThat(pref.getEntries().length).isEqualTo(4);
+        assertThat(pref.getEntryValues().length).isEqualTo(4);
+        assertThat(pref.getEntryValues()[0].toString()).isEqualTo("0");
+        assertThat(pref.getEntryValues()[1].toString()).isEqualTo("1");
+        assertThat(pref.getEntryValues()[2].toString()).isEqualTo("2");
+        assertThat(pref.getEntryValues()[3].toString()).isEqualTo("3");
+        assertThat(pref.getEntries()[0].length()).isGreaterThan(0);
+        assertThat(pref.getEntries()[1].length()).isGreaterThan(0);
+        assertThat("" + pref.getSummary()).isEqualTo(pref.getEntries()[0].toString());
+        assertThat(pref.getValue()).isEqualTo("0");
+        assertThat(pref.getOnPreferenceChangeListener()).isNotNull();
+        assertThat(pref.isEnabled()).isTrue();
+        var rotation = 1;
+        doReturn(true).when(mMockedInjector).freezeDisplayRotation(mDisplayIdArg, rotation);
+        assertThat(pref.getOnPreferenceChangeListener().onPreferenceChange(pref, rotation + ""))
+                .isTrue();
+        verify(mMockedInjector).freezeDisplayRotation(mDisplayIdArg, rotation);
+        assertThat(pref.getValue()).isEqualTo(rotation + "");
+        verify(mMockedMetricsLogger).writePreferenceClickMetric(pref);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testDisplayResolutionPreference() {
+        mDisplayIdArg = 1;
+        doReturn(true).when(mMockedInjector).isDisplayEnabled(any());
+        var fragment = initFragment();
+        mHandler.flush();
+        var pref = fragment.getResolutionPreference(mContext);
+        assertThat(pref.getKey()).isEqualTo(EXTERNAL_DISPLAY_RESOLUTION_PREFERENCE_KEY);
+        assertThat("" + pref.getTitle()).isEqualTo(
+                getText(EXTERNAL_DISPLAY_RESOLUTION_TITLE_RESOURCE));
+        assertThat("" + pref.getSummary()).isEqualTo("1920 x 1080");
+        assertThat(pref.isEnabled()).isTrue();
+        assertThat(pref.getOnPreferenceClickListener()).isNotNull();
+        assertThat(pref.getOnPreferenceClickListener().onPreferenceClick(pref)).isTrue();
+        assertThat(mResolutionSelectorDisplayId).isEqualTo(mDisplayIdArg);
+        verify(mMockedMetricsLogger).writePreferenceClickMetric(pref);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testUseDisplayPreference_EnabledDisplay() {
+        mDisplayIdArg = 1;
+        doReturn(true).when(mMockedInjector).isDisplayEnabled(any());
+        doReturn(true).when(mMockedInjector).enableConnectedDisplay(mDisplayIdArg);
+        doReturn(true).when(mMockedInjector).disableConnectedDisplay(mDisplayIdArg);
+        var fragment = initFragment();
+        mHandler.flush();
+        var pref = fragment.getUseDisplayPreference(mContext);
+        assertThat(pref.getKey()).isEqualTo(EXTERNAL_DISPLAY_USE_PREFERENCE_KEY);
+        assertThat("" + pref.getTitle()).isEqualTo(getText(EXTERNAL_DISPLAY_USE_TITLE_RESOURCE));
+        assertThat(pref.isEnabled()).isTrue();
+        assertThat(pref.isChecked()).isTrue();
+        assertThat(pref.getOnPreferenceChangeListener()).isNotNull();
+        assertThat(pref.getOnPreferenceChangeListener().onPreferenceChange(pref, false)).isTrue();
+        verify(mMockedInjector).disableConnectedDisplay(mDisplayIdArg);
+        assertThat(pref.isChecked()).isFalse();
+        assertThat(pref.getOnPreferenceChangeListener().onPreferenceChange(pref, true)).isTrue();
+        verify(mMockedInjector).enableConnectedDisplay(mDisplayIdArg);
+        assertThat(pref.isChecked()).isTrue();
+        verify(mMockedMetricsLogger, times(2)).writePreferenceClickMetric(pref);
+    }
+
+    @NonNull
+    private ExternalDisplayPreferenceFragment initFragment() {
+        if (mFragment != null) {
+            return mFragment;
+        }
+        mFragment = new TestableExternalDisplayPreferenceFragment();
+        mFragment.onCreateCallback(null);
+        mFragment.onActivityCreatedCallback(null);
+        mFragment.onStartCallback();
+        return mFragment;
+    }
+
+    @NonNull
+    private Bundle createBundleForPreviouslyShownList() {
+        var state = new Bundle();
+        state.putBoolean(PREVIOUSLY_SHOWN_LIST_KEY, true);
+        return state;
+    }
+
+    @NonNull
+    private String getText(int id) {
+        return mContext.getResources().getText(id).toString();
+    }
+
+    private class TestableExternalDisplayPreferenceFragment extends
+            ExternalDisplayPreferenceFragment {
+        private final View mMockedRootView;
+        private final TextView mEmptyView;
+        private final Activity mMockedActivity;
+        private final FooterPreference mMockedFooterPreference;
+        private final MetricsLogger mLogger;
+
+        TestableExternalDisplayPreferenceFragment() {
+            super(mMockedInjector);
+            mMockedActivity = mock(Activity.class);
+            mMockedRootView = mock(View.class);
+            mMockedFooterPreference = mock(FooterPreference.class);
+            doReturn(KEY_FOOTER).when(mMockedFooterPreference).getKey();
+            mEmptyView = new TextView(mContext);
+            doReturn(mEmptyView).when(mMockedRootView).findViewById(android.R.id.empty);
+            mLogger = mMockedMetricsLogger;
+        }
+
+        @Override
+        public PreferenceScreen getPreferenceScreen() {
+            return mPreferenceScreen;
+        }
+
+        @Override
+        protected Activity getCurrentActivity() {
+            return mMockedActivity;
+        }
+
+        @Override
+        public View getView() {
+            return mMockedRootView;
+        }
+
+        @Override
+        public void setEmptyView(View view) {
+            assertThat(view).isEqualTo(mEmptyView);
+        }
+
+        @Override
+        public View getEmptyView() {
+            return mEmptyView;
+        }
+
+        @Override
+        public void addPreferencesFromResource(int resource) {
+            mPreferenceIdFromResource = resource;
+        }
+
+        @Override
+        @NonNull
+        FooterPreference getFooterPreference(@NonNull Context context) {
+            return mMockedFooterPreference;
+        }
+
+        @Override
+        protected int getDisplayIdArg() {
+            return mDisplayIdArg;
+        }
+
+        @Override
+        protected void launchResolutionSelector(@NonNull Context context, int displayId) {
+            mResolutionSelectorDisplayId = displayId;
+        }
+
+        @Override
+        protected void launchDisplaySettings(final int displayId) {
+            mDisplayIdArg = displayId;
+        }
+
+        @Override
+        protected void writePreferenceClickMetric(Preference preference) {
+            mLogger.writePreferenceClickMetric(preference);
+        }
+    }
+
+    /**
+     * Interface allowing to mock and spy on log events.
+     */
+    public interface MetricsLogger {
+
+        /**
+         * On preference click metric
+         */
+        void writePreferenceClickMetric(Preference preference);
+    }
+}
--- a/tests/unit/src/com/android/settings/connecteddevice/display/ExternalDisplayTestBase.java
+++ b/tests/unit/src/com/android/settings/connecteddevice/display/ExternalDisplayTestBase.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+package com.android.settings.connecteddevice.display;
+
+import static com.android.settings.connecteddevice.display.ExternalDisplaySettingsConfiguration.VIRTUAL_DISPLAY_PACKAGE_NAME_SYSTEM_PROPERTY;
+import static com.android.settings.flags.Flags.FLAG_ROTATION_CONNECTED_DISPLAY_SETTING;
+import static com.android.settings.flags.Flags.FLAG_RESOLUTION_AND_ENABLE_CONNECTED_DISPLAY_SETTING;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.hardware.display.DisplayManagerGlobal;
+import android.hardware.display.IDisplayManager;
+import android.os.RemoteException;
+import android.view.Display;
+import android.view.DisplayAdjustments;
+import android.view.DisplayInfo;
+
+import androidx.preference.PreferenceManager;
+import androidx.preference.PreferenceScreen;
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.server.testutils.TestHandler;
+import com.android.settings.connecteddevice.display.ExternalDisplaySettingsConfiguration.DisplayListener;
+import com.android.settings.flags.FakeFeatureFlagsImpl;
+
+import org.junit.Before;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+public class ExternalDisplayTestBase {
+    @Mock
+    ExternalDisplaySettingsConfiguration.Injector mMockedInjector;
+    @Mock
+    IDisplayManager mMockedIDisplayManager;
+    Resources mResources;
+    DisplayManagerGlobal mDisplayManagerGlobal;
+    FakeFeatureFlagsImpl mFlags = new FakeFeatureFlagsImpl();
+    Context mContext;
+    DisplayListener mListener;
+    TestHandler mHandler = new TestHandler(null);
+    PreferenceManager mPreferenceManager;
+    PreferenceScreen mPreferenceScreen;
+    Display[] mDisplays;
+
+    /**
+     * Setup.
+     */
+    @Before
+    public void setUp() throws RemoteException {
+        MockitoAnnotations.initMocks(this);
+        mContext = spy(ApplicationProvider.getApplicationContext());
+        mResources = spy(mContext.getResources());
+        doReturn(mResources).when(mContext).getResources();
+        mPreferenceManager = new PreferenceManager(mContext);
+        mPreferenceScreen = mPreferenceManager.createPreferenceScreen(mContext);
+        doReturn(0).when(mMockedIDisplayManager).getPreferredWideGamutColorSpaceId();
+        mDisplayManagerGlobal = new DisplayManagerGlobal(mMockedIDisplayManager);
+        mFlags.setFlag(FLAG_ROTATION_CONNECTED_DISPLAY_SETTING, true);
+        mFlags.setFlag(FLAG_RESOLUTION_AND_ENABLE_CONNECTED_DISPLAY_SETTING, true);
+        mDisplays = new Display[] {
+                createDefaultDisplay(), createExternalDisplay(), createOverlayDisplay()};
+        doReturn(mDisplays).when(mMockedInjector).getAllDisplays();
+        doReturn(mDisplays).when(mMockedInjector).getEnabledDisplays();
+        for (var display : mDisplays) {
+            doReturn(display).when(mMockedInjector).getDisplay(display.getDisplayId());
+        }
+        doReturn(mFlags).when(mMockedInjector).getFlags();
+        doReturn(mHandler).when(mMockedInjector).getHandler();
+        doReturn("").when(mMockedInjector).getSystemProperty(
+                VIRTUAL_DISPLAY_PACKAGE_NAME_SYSTEM_PROPERTY);
+        doAnswer((arg) -> {
+            mListener = arg.getArgument(0);
+            return null;
+        }).when(mMockedInjector).registerDisplayListener(any());
+        doReturn(0).when(mMockedInjector).getDisplayUserRotation(anyInt());
+        doReturn(mContext).when(mMockedInjector).getContext();
+    }
+
+    Display createDefaultDisplay() throws RemoteException {
+        int displayId = 0;
+        var displayInfo = new DisplayInfo();
+        doReturn(displayInfo).when(mMockedIDisplayManager).getDisplayInfo(displayId);
+        displayInfo.displayId = displayId;
+        displayInfo.name = "Built-in";
+        displayInfo.type = Display.TYPE_INTERNAL;
+        displayInfo.supportedModes = new Display.Mode[]{
+                new Display.Mode(0, 2048, 1024, 60, 60, new float[0],
+                    new int[0])};
+        displayInfo.appsSupportedModes = displayInfo.supportedModes;
+        return createDisplay(displayInfo);
+    }
+
+    Display createExternalDisplay() throws RemoteException {
+        int displayId = 1;
+        var displayInfo = new DisplayInfo();
+        doReturn(displayInfo).when(mMockedIDisplayManager).getDisplayInfo(displayId);
+        displayInfo.displayId = displayId;
+        displayInfo.name = "HDMI";
+        displayInfo.type = Display.TYPE_EXTERNAL;
+        displayInfo.supportedModes = new Display.Mode[]{
+                new Display.Mode(0, 1920, 1080, 60, 60, new float[0], new int[0]),
+                new Display.Mode(1, 800, 600, 60, 60, new float[0], new int[0]),
+                new Display.Mode(2, 320, 240, 70, 70, new float[0], new int[0]),
+                new Display.Mode(3, 640, 480, 60, 60, new float[0], new int[0]),
+                new Display.Mode(4, 640, 480, 50, 60, new float[0], new int[0]),
+                new Display.Mode(5, 2048, 1024, 60, 60, new float[0], new int[0]),
+                new Display.Mode(6, 720, 480, 60, 60, new float[0], new int[0])};
+        displayInfo.appsSupportedModes = displayInfo.supportedModes;
+        return createDisplay(displayInfo);
+    }
+
+    Display createOverlayDisplay() throws RemoteException {
+        int displayId = 2;
+        var displayInfo = new DisplayInfo();
+        doReturn(displayInfo).when(mMockedIDisplayManager).getDisplayInfo(displayId);
+        displayInfo.displayId = displayId;
+        displayInfo.name = "Overlay #1";
+        displayInfo.type = Display.TYPE_OVERLAY;
+        displayInfo.supportedModes = new Display.Mode[]{
+                new Display.Mode(0, 1240, 780, 60, 60, new float[0],
+                    new int[0])};
+        displayInfo.appsSupportedModes = displayInfo.supportedModes;
+        return createDisplay(displayInfo);
+    }
+
+    Display createDisplay(DisplayInfo displayInfo) {
+        return new Display(mDisplayManagerGlobal, displayInfo.displayId, displayInfo,
+                (DisplayAdjustments) null);
+    }
+}
--- a/tests/unit/src/com/android/settings/connecteddevice/display/ExternalDisplayUpdaterTest.java
+++ b/tests/unit/src/com/android/settings/connecteddevice/display/ExternalDisplayUpdaterTest.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+package com.android.settings.connecteddevice.display;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.doReturn;
+
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.os.RemoteException;
+import android.view.Display;
+
+import androidx.annotation.Nullable;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.settings.connecteddevice.DevicePreferenceCallback;
+import com.android.settingslib.RestrictedLockUtils;
+import com.android.settingslib.RestrictedPreference;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+
+/** Unit tests for {@link ExternalDisplayUpdater}.  */
+@RunWith(AndroidJUnit4.class)
+public class ExternalDisplayUpdaterTest extends ExternalDisplayTestBase {
+
+    private ExternalDisplayUpdater mUpdater;
+    @Mock
+    private DevicePreferenceCallback mMockedCallback;
+    @Mock
+    private Drawable mMockedDrawable;
+    private RestrictedPreference mPreferenceAdded;
+    private RestrictedPreference mPreferenceRemoved;
+
+    @Before
+    public void setUp() throws RemoteException {
+        super.setUp();
+        mUpdater = new TestableExternalDisplayUpdater(mMockedCallback, /*metricsCategory=*/ 0);
+    }
+
+    @Test
+    public void testPreferenceAdded() {
+        doAnswer((v) -> {
+            mPreferenceAdded = v.getArgument(0);
+            return null;
+        }).when(mMockedCallback).onDeviceAdded(any());
+        mUpdater.initPreference(mContext, mMockedInjector);
+        mUpdater.registerCallback();
+        mHandler.flush();
+        assertThat(mPreferenceAdded).isNotNull();
+        var summary = mPreferenceAdded.getSummary();
+        assertThat(summary).isNotNull();
+        assertThat(summary.length()).isGreaterThan(0);
+        var title = mPreferenceAdded.getTitle();
+        assertThat(title).isNotNull();
+        assertThat(title.length()).isGreaterThan(0);
+    }
+
+    @Test
+    public void testPreferenceRemoved() {
+        doAnswer((v) -> {
+            mPreferenceAdded = v.getArgument(0);
+            return null;
+        }).when(mMockedCallback).onDeviceAdded(any());
+        doAnswer((v) -> {
+            mPreferenceRemoved = v.getArgument(0);
+            return null;
+        }).when(mMockedCallback).onDeviceRemoved(any());
+        mUpdater.initPreference(mContext, mMockedInjector);
+        mUpdater.registerCallback();
+        mHandler.flush();
+        assertThat(mPreferenceAdded).isNotNull();
+        assertThat(mPreferenceRemoved).isNull();
+        // Remove display
+        doReturn(new Display[0]).when(mMockedInjector).getAllDisplays();
+        doReturn(new Display[0]).when(mMockedInjector).getEnabledDisplays();
+        mListener.onDisplayRemoved(1);
+        mHandler.flush();
+        assertThat(mPreferenceRemoved).isEqualTo(mPreferenceAdded);
+    }
+
+    class TestableExternalDisplayUpdater extends ExternalDisplayUpdater {
+        TestableExternalDisplayUpdater(
+                DevicePreferenceCallback callback,
+                int metricsCategory) {
+            super(callback, metricsCategory);
+        }
+
+        @Override
+        @Nullable
+        protected RestrictedLockUtils.EnforcedAdmin checkIfUsbDataSignalingIsDisabled(
+                Context context) {
+            // if null is returned - usb signalling is enabled
+            return null;
+        }
+
+        @Override
+        @Nullable
+        protected Drawable getDrawable(Context context) {
+            return mMockedDrawable;
+        }
+    }
+}
--- a/tests/unit/src/com/android/settings/connecteddevice/display/ResolutionPreferenceFragmentTest.java
+++ b/tests/unit/src/com/android/settings/connecteddevice/display/ResolutionPreferenceFragmentTest.java
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+package com.android.settings.connecteddevice.display;
+
+import static android.view.Display.INVALID_DISPLAY;
+
+import static com.android.settings.connecteddevice.display.ResolutionPreferenceFragment.EXTERNAL_DISPLAY_RESOLUTION_SETTINGS_RESOURCE;
+import static com.android.settings.connecteddevice.display.ResolutionPreferenceFragment.MORE_OPTIONS_KEY;
+import static com.android.settings.connecteddevice.display.ResolutionPreferenceFragment.TOP_OPTIONS_KEY;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.view.View;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceScreen;
+import androidx.test.annotation.UiThreadTest;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.settingslib.widget.SelectorWithWidgetPreference;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+
+/** Unit tests for {@link ResolutionPreferenceFragment}.  */
+@RunWith(AndroidJUnit4.class)
+public class ResolutionPreferenceFragmentTest extends ExternalDisplayTestBase {
+    @Nullable
+    private ResolutionPreferenceFragment mFragment;
+    private int mPreferenceIdFromResource;
+    private int mDisplayIdArg = INVALID_DISPLAY;
+    @Mock
+    private MetricsLogger mMockedMetricsLogger;
+
+    @Test
+    @UiThreadTest
+    public void testCreateAndStart() {
+        initFragment();
+        mHandler.flush();
+        assertThat(mPreferenceIdFromResource).isEqualTo(
+                EXTERNAL_DISPLAY_RESOLUTION_SETTINGS_RESOURCE);
+        var pref = mPreferenceScreen.findPreference(TOP_OPTIONS_KEY);
+        assertThat(pref).isNull();
+        pref = mPreferenceScreen.findPreference(MORE_OPTIONS_KEY);
+        assertThat(pref).isNull();
+    }
+
+    @Test
+    @UiThreadTest
+    public void testCreateAndStartDefaultDisplayNotAllowed() {
+        mDisplayIdArg = 0;
+        initFragment();
+        mHandler.flush();
+        var pref = mPreferenceScreen.findPreference(TOP_OPTIONS_KEY);
+        assertThat(pref).isNull();
+        pref = mPreferenceScreen.findPreference(MORE_OPTIONS_KEY);
+        assertThat(pref).isNull();
+    }
+
+    @Test
+    @UiThreadTest
+    public void testModePreferences() {
+        mDisplayIdArg = 1;
+        initFragment();
+        mHandler.flush();
+        PreferenceCategory topPref = mPreferenceScreen.findPreference(TOP_OPTIONS_KEY);
+        assertThat(topPref).isNotNull();
+        PreferenceCategory morePref = mPreferenceScreen.findPreference(MORE_OPTIONS_KEY);
+        assertThat(morePref).isNotNull();
+        assertThat(topPref.getPreferenceCount()).isEqualTo(3);
+        assertThat(morePref.getPreferenceCount()).isEqualTo(1);
+    }
+
+    @Test
+    @UiThreadTest
+    public void testModeChange() {
+        mDisplayIdArg = 1;
+        initFragment();
+        mHandler.flush();
+        PreferenceCategory topPref = mPreferenceScreen.findPreference(TOP_OPTIONS_KEY);
+        assertThat(topPref).isNotNull();
+        var modePref = (SelectorWithWidgetPreference) topPref.getPreference(1);
+        modePref.onClick();
+        var mode = mDisplays[mDisplayIdArg].getSupportedModes()[1];
+        verify(mMockedInjector).setUserPreferredDisplayMode(mDisplayIdArg, mode);
+    }
+
+    private void initFragment() {
+        if (mFragment != null) {
+            return;
+        }
+        mFragment = new TestableResolutionPreferenceFragment();
+        mFragment.onCreateCallback(null);
+        mFragment.onActivityCreatedCallback(null);
+        mFragment.onStartCallback();
+    }
+
+    private class TestableResolutionPreferenceFragment extends ResolutionPreferenceFragment {
+        private final View mMockedRootView;
+        private final TextView mEmptyView;
+        private final Resources mMockedResources;
+        private final MetricsLogger mLogger;
+        TestableResolutionPreferenceFragment() {
+            super(mMockedInjector);
+            mMockedResources = mock(Resources.class);
+            doReturn(61).when(mMockedResources).getInteger(
+                    com.android.internal.R.integer.config_externalDisplayPeakRefreshRate);
+            doReturn(1920).when(mMockedResources).getInteger(
+                    com.android.internal.R.integer.config_externalDisplayPeakWidth);
+            doReturn(1080).when(mMockedResources).getInteger(
+                    com.android.internal.R.integer.config_externalDisplayPeakHeight);
+            doReturn(true).when(mMockedResources).getBoolean(
+                    com.android.internal.R.bool.config_refreshRateSynchronizationEnabled);
+            mMockedRootView = mock(View.class);
+            mEmptyView = new TextView(mContext);
+            doReturn(mEmptyView).when(mMockedRootView).findViewById(android.R.id.empty);
+            mLogger = mMockedMetricsLogger;
+        }
+
+        @Override
+        public PreferenceScreen getPreferenceScreen() {
+            return mPreferenceScreen;
+        }
+
+        @Override
+        public View getView() {
+            return mMockedRootView;
+        }
+
+        @Override
+        public void setEmptyView(View view) {
+            assertThat(view).isEqualTo(mEmptyView);
+        }
+
+        @Override
+        public View getEmptyView() {
+            return mEmptyView;
+        }
+
+        @Override
+        public void addPreferencesFromResource(int resource) {
+            mPreferenceIdFromResource = resource;
+        }
+
+        @Override
+        protected int getDisplayIdArg() {
+            return mDisplayIdArg;
+        }
+
+        @Override
+        protected void writePreferenceClickMetric(Preference preference) {
+            mLogger.writePreferenceClickMetric(preference);
+        }
+
+        @Override
+        @NonNull
+        protected Resources getResources(@NonNull Context context) {
+            return mMockedResources;
+        }
+    }
+
+    /**
+     * Interface allowing to mock and spy on log events.
+     */
+    public interface MetricsLogger {
+        /**
+         * On preference click metric
+         */
+        void writePreferenceClickMetric(Preference preference);
+    }
+}