Merge "Refactor hotspot into a full page"

tests/robotests/src/com/android/settings/core/codeinspection/CodeInspectionTest.java

@@ -16,10 +16,10 @@
 
 package com.android.settings.core.codeinspection;
 
-import com.android.settings.testutils.SettingsRobolectricTestRunner;
 import com.android.settings.TestConfig;
 import com.android.settings.core.instrumentation.InstrumentableFragmentCodeInspector;
 import com.android.settings.search.SearchIndexProviderCodeInspector;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
 
 import org.junit.Before;
 import org.junit.Test;

tests/robotests/src/com/android/settings/widget/ValidatedEditTextPreferenceTest.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2017 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.widget;
+
+
+import android.text.InputType;
+import android.text.TextWatcher;
+import android.view.View;
+import android.widget.EditText;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyZeroInteractions;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class ValidatedEditTextPreferenceTest {
+
+    @Mock
+    private View mView;
+    @Mock
+    private ValidatedEditTextPreference.Validator mValidator;
+
+    private ValidatedEditTextPreference mPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mPreference = new ValidatedEditTextPreference(RuntimeEnvironment.application);
+    }
+
+    @Test
+    public void bindDialogView_noTextWatcher_shouldDoNothing() {
+        mPreference.onBindDialogView(mView);
+
+        verifyZeroInteractions(mView);
+    }
+
+    @Test
+    public void bindDialogView_hasValidator_shouldBindToEditText() {
+        final EditText editText = spy(new EditText(RuntimeEnvironment.application));
+        when(mView.findViewById(android.R.id.edit)).thenReturn(editText);
+
+        mPreference.setValidator(mValidator);
+        mPreference.onBindDialogView(mView);
+
+        verify(editText).addTextChangedListener(any(TextWatcher.class));
+    }
+
+    @Test
+    public void bindDialogView_isPassword_shouldSetInputType() {
+        final EditText editText = spy(new EditText(RuntimeEnvironment.application));
+        when(mView.findViewById(android.R.id.edit)).thenReturn(editText);
+
+        mPreference.setValidator(mValidator);
+        mPreference.setIsPassword(true);
+        mPreference.onBindDialogView(mView);
+
+        assertThat(editText.getInputType()
+                & (InputType.TYPE_TEXT_VARIATION_PASSWORD | InputType.TYPE_CLASS_TEXT))
+                .isNotEqualTo(0);
+    }
+}

tests/robotests/src/com/android/settings/wifi/WifiUtilsTest.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2017 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.wifi;
+
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.annotation.Config;
+
+import static com.google.common.truth.Truth.assertThat;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class WifiUtilsTest {
+
+    @Test
+    public void testSSID() {
+        assertThat(WifiUtils.isSSIDTooLong("123")).isFalse();
+        assertThat(WifiUtils.isSSIDTooLong("☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎☎")).isTrue();
+
+        assertThat(WifiUtils.isSSIDTooShort("123")).isFalse();
+        assertThat(WifiUtils.isSSIDTooShort("")).isTrue();
+    }
+
+    @Test
+    public void testPassword() {
+        final String longPassword = "123456789012345678901234567890"
+                + "1234567890123456789012345678901234567890";
+        assertThat(WifiUtils.isPasswordValid("123")).isFalse();
+        assertThat(WifiUtils.isPasswordValid("12345678")).isTrue();
+        assertThat(WifiUtils.isPasswordValid("1234567890")).isTrue();
+        assertThat(WifiUtils.isPasswordValid(longPassword)).isFalse();
+    }
+
+}

tests/robotests/src/com/android/settings/wifi/tether/WifiTetherApBandPreferenceControllerTest.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2017 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.wifi.tether;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.wifi.WifiManager;
+import android.support.v7.preference.ListPreference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class WifiTetherApBandPreferenceControllerTest {
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock
+    private ConnectivityManager mConnectivityManager;
+    @Mock
+    private WifiManager mWifiManager;
+    @Mock
+    private WifiTetherBasePreferenceController.OnTetherConfigUpdateListener mListener;
+    @Mock
+    private PreferenceScreen mScreen;
+
+    private WifiTetherApBandPreferenceController mController;
+    private ListPreference mListPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mListPreference = new ListPreference(RuntimeEnvironment.application);
+        when(mContext.getSystemService(Context.WIFI_SERVICE)).thenReturn(mWifiManager);
+        when(mContext.getSystemService(Context.CONNECTIVITY_SERVICE))
+                .thenReturn(mConnectivityManager);
+        when(mConnectivityManager.getTetherableWifiRegexs()).thenReturn(new String[]{"1", "2"});
+        when(mContext.getResources()).thenReturn(RuntimeEnvironment.application.getResources());
+        when(mScreen.findPreference(anyString())).thenReturn(mListPreference);
+
+        mController = new WifiTetherApBandPreferenceController(mContext, mListener);
+    }
+
+    @Test
+    public void display_5GhzSupported_shouldDisplayFullList() {
+        when(mWifiManager.is5GHzBandSupported()).thenReturn(true);
+
+        mController.displayPreference(mScreen);
+
+        assertThat(mListPreference.getEntries().length).isEqualTo(2);
+    }
+
+    @Test
+    public void display_5GhzNotSupported_shouldDisable() {
+        when(mWifiManager.is5GHzBandSupported()).thenReturn(false);
+
+        mController.displayPreference(mScreen);
+
+        assertThat(mListPreference.getEntries()).isNull();
+        assertThat(mListPreference.isEnabled()).isFalse();
+        assertThat(mListPreference.getSummary())
+                .isEqualTo(RuntimeEnvironment.application.getString(R.string.wifi_ap_choose_2G));
+    }
+
+    @Test
+    public void changePreference_shouldUpdateValue() {
+        when(mWifiManager.is5GHzBandSupported()).thenReturn(true);
+
+        mController.displayPreference(mScreen);
+        mController.onPreferenceChange(mListPreference, "1");
+        assertThat(mController.getBandIndex()).isEqualTo(1);
+
+        mController.onPreferenceChange(mListPreference, "0");
+        assertThat(mController.getBandIndex()).isEqualTo(0);
+
+        verify(mListener, times(2)).onTetherConfigUpdated();
+    }
+}

tests/robotests/src/com/android/settings/wifi/tether/WifiTetherPasswordPreferenceControllerTest.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2017 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.wifi.tether;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.wifi.WifiConfiguration;
+import android.net.wifi.WifiManager;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.widget.ValidatedEditTextPreference;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class WifiTetherPasswordPreferenceControllerTest {
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock
+    private ConnectivityManager mConnectivityManager;
+    @Mock
+    private WifiManager mWifiManager;
+    @Mock
+    private WifiTetherBasePreferenceController.OnTetherConfigUpdateListener mListener;
+    @Mock
+    private PreferenceScreen mScreen;
+
+    private WifiTetherPasswordPreferenceController mController;
+    private ValidatedEditTextPreference mPreference;
+    private WifiConfiguration mConfig;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mPreference = new ValidatedEditTextPreference(RuntimeEnvironment.application);
+        mConfig = new WifiConfiguration();
+        mConfig.SSID = "test_1234";
+        mConfig.preSharedKey = "test_password";
+
+        when(mContext.getSystemService(Context.WIFI_SERVICE)).thenReturn(mWifiManager);
+        when(mWifiManager.getWifiApConfiguration()).thenReturn(mConfig);
+        when(mContext.getSystemService(Context.CONNECTIVITY_SERVICE))
+                .thenReturn(mConnectivityManager);
+        when(mConnectivityManager.getTetherableWifiRegexs()).thenReturn(new String[]{"1", "2"});
+        when(mContext.getResources()).thenReturn(RuntimeEnvironment.application.getResources());
+        when(mScreen.findPreference(anyString())).thenReturn(mPreference);
+
+        mController = new WifiTetherPasswordPreferenceController(mContext, mListener);
+    }
+
+    @Test
+    public void displayPreference_shouldStylePreference() {
+        mController.displayPreference(mScreen);
+
+        assertThat(mPreference.getText()).isEqualTo(mConfig.preSharedKey);
+        assertThat(mPreference.isPassword()).isTrue();
+    }
+
+    @Test
+    public void changePreference_shouldUpdateValue() {
+        mController.displayPreference(mScreen);
+        mController.onPreferenceChange(mPreference, "1");
+        assertThat(mController.getPassword()).isEqualTo("1");
+
+        mController.onPreferenceChange(mPreference, "0");
+        assertThat(mController.getPassword()).isEqualTo("0");
+
+        verify(mListener, times(2)).onTetherConfigUpdated();
+    }
+}

tests/robotests/src/com/android/settings/wifi/tether/WifiTetherPreferenceControllerTest.java

@@ -0,0 +1,186 @@
+/*
+ * Copyright (C) 2017 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.wifi.tether;
+
+import android.content.BroadcastReceiver;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.ConnectivityManager;
+import android.net.wifi.WifiConfiguration;
+import android.net.wifi.WifiManager;
+import android.provider.Settings;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.R;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.shadows.ShadowSettings;
+import org.robolectric.util.ReflectionHelpers;
+
+import java.util.ArrayList;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION,
+        shadows = {
+                WifiTetherPreferenceControllerTest.ShadowWifiTetherSettings.class
+        })
+public class WifiTetherPreferenceControllerTest {
+
+    @Mock
+    private Context mContext;
+    @Mock
+    private ConnectivityManager mConnectivityManager;
+    @Mock
+    private WifiManager mWifiManager;
+    @Mock
+    private PreferenceScreen mScreen;
+
+    private WifiTetherPreferenceController mController;
+    private Lifecycle mLifecycle;
+    private Preference mPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mLifecycle = new Lifecycle();
+        mPreference = new Preference(RuntimeEnvironment.application);
+        when(mContext.getSystemService(Context.CONNECTIVITY_SERVICE))
+                .thenReturn(mConnectivityManager);
+        when(mContext.getSystemService(Context.WIFI_SERVICE)).thenReturn(mWifiManager);
+        when(mScreen.findPreference(anyString())).thenReturn(mPreference);
+
+        when(mConnectivityManager.getTetherableWifiRegexs()).thenReturn(new String[]{"1", "2"});
+        mController = new WifiTetherPreferenceController(mContext, mLifecycle);
+    }
+
+    @Test
+    public void isAvailable_noTetherRegex_shouldReturnFalse() {
+        when(mConnectivityManager.getTetherableWifiRegexs()).thenReturn(new String[]{});
+        mController = new WifiTetherPreferenceController(mContext, mLifecycle);
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
+
+    @Test
+    public void isAvailable_hasTetherRegex_shouldReturnTrue() {
+        assertThat(mController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void resumeAndPause_shouldRegisterUnregisterReceiver() {
+        final BroadcastReceiver receiver = ReflectionHelpers.getField(mController, "mReceiver");
+
+        mController.displayPreference(mScreen);
+        mLifecycle.onResume();
+        mLifecycle.onPause();
+
+        verify(mContext).registerReceiver(eq(receiver), any(IntentFilter.class));
+        verify(mContext).unregisterReceiver(receiver);
+
+    }
+
+    @Test
+    public void testReceiver_apStateChangedToDisabled_shouldUpdatePreferenceSummary() {
+        mController.displayPreference(mScreen);
+        final BroadcastReceiver receiver = ReflectionHelpers.getField(mController, "mReceiver");
+        final Intent broadcast = new Intent(WifiManager.WIFI_AP_STATE_CHANGED_ACTION);
+        broadcast.putExtra(WifiManager.EXTRA_WIFI_AP_STATE, WifiManager.WIFI_AP_STATE_DISABLED);
+
+        receiver.onReceive(RuntimeEnvironment.application, broadcast);
+
+        assertThat(mPreference.getSummary().toString()).isEqualTo(
+                RuntimeEnvironment.application.getString(R.string.wifi_hotspot_off_subtext));
+    }
+
+    @Test
+    public void testReceiver_apStateChangedToDisabling_shouldUpdatePreferenceSummary() {
+        mController.displayPreference(mScreen);
+        final BroadcastReceiver receiver = ReflectionHelpers.getField(mController, "mReceiver");
+        final Intent broadcast = new Intent(WifiManager.WIFI_AP_STATE_CHANGED_ACTION);
+        broadcast.putExtra(WifiManager.EXTRA_WIFI_AP_STATE, WifiManager.WIFI_AP_STATE_DISABLING);
+
+        receiver.onReceive(RuntimeEnvironment.application, broadcast);
+
+        assertThat(mPreference.getSummary().toString()).isEqualTo(
+                RuntimeEnvironment.application.getString(R.string.wifi_tether_stopping));
+    }
+
+    @Test
+    public void testReceiver_goingToAirplaneMode_shouldClearPreferenceSummary() {
+        final ContentResolver cr = mock(ContentResolver.class);
+        when(mContext.getContentResolver()).thenReturn(cr);
+        ShadowSettings.ShadowGlobal.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, 1);
+        mController.displayPreference(mScreen);
+        final BroadcastReceiver receiver = ReflectionHelpers.getField(mController, "mReceiver");
+        final Intent broadcast = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
+
+        receiver.onReceive(RuntimeEnvironment.application, broadcast);
+
+        assertThat(mPreference.getSummary().toString()).isEqualTo(
+                RuntimeEnvironment.application.getString(R.string.summary_placeholder));
+    }
+
+    @Test
+    public void testReceiver_tetherEnabled_shouldUpdatePreferenceSummary() {
+        mController.displayPreference(mScreen);
+        final BroadcastReceiver receiver = ReflectionHelpers.getField(mController, "mReceiver");
+        final Intent broadcast = new Intent(ConnectivityManager.ACTION_TETHER_STATE_CHANGED);
+        final ArrayList<String> activeTethers = new ArrayList<>();
+        activeTethers.add("1");
+        broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ACTIVE_TETHER, activeTethers);
+        broadcast.putStringArrayListExtra(ConnectivityManager.EXTRA_ERRORED_TETHER,
+                new ArrayList<>());
+        final WifiConfiguration configuration = new WifiConfiguration();
+        configuration.SSID = "test-ap";
+        when(mWifiManager.getWifiApConfiguration()).thenReturn(configuration);
+
+        receiver.onReceive(RuntimeEnvironment.application, broadcast);
+
+        verify(mContext).getString(eq(R.string.wifi_tether_enabled_subtext), any());
+    }
+
+    @Implements(WifiTetherSettings.class)
+    public static final class ShadowWifiTetherSettings {
+
+        @Implementation
+        public static boolean isTetherSettingPageEnabled() {
+            return true;
+        }
+    }
+}

tests/robotests/src/com/android/settings/wifi/tether/WifiTetherSSIDPreferenceControllerTest.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2017 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.wifi.tether;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.wifi.WifiConfiguration;
+import android.net.wifi.WifiManager;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.widget.ValidatedEditTextPreference;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class WifiTetherSSIDPreferenceControllerTest {
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock
+    private ConnectivityManager mConnectivityManager;
+    @Mock
+    private WifiManager mWifiManager;
+    @Mock
+    private WifiTetherBasePreferenceController.OnTetherConfigUpdateListener mListener;
+    @Mock
+    private PreferenceScreen mScreen;
+
+    private WifiTetherSSIDPreferenceController mController;
+    private ValidatedEditTextPreference mPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mPreference = new ValidatedEditTextPreference(RuntimeEnvironment.application);
+
+        when(mContext.getSystemService(Context.WIFI_SERVICE)).thenReturn(mWifiManager);
+        when(mContext.getSystemService(Context.CONNECTIVITY_SERVICE))
+                .thenReturn(mConnectivityManager);
+        when(mConnectivityManager.getTetherableWifiRegexs()).thenReturn(new String[]{"1", "2"});
+        when(mContext.getResources()).thenReturn(RuntimeEnvironment.application.getResources());
+        when(mScreen.findPreference(anyString())).thenReturn(mPreference);
+
+        mController = new WifiTetherSSIDPreferenceController(mContext, mListener);
+    }
+
+    @Test
+    public void displayPreference_noWifiConfig_shouldDisplayDefaultSSID() {
+        when(mWifiManager.getWifiApConfiguration()).thenReturn(null);
+
+        mController.displayPreference(mScreen);
+        assertThat(mController.getSSID())
+                .isEqualTo(WifiTetherSSIDPreferenceController.DEFAULT_SSID);
+    }
+
+    @Test
+    public void displayPreference_hasCustomWifiConfig_shouldDisplayCustomSSID() {
+        final WifiConfiguration config = new WifiConfiguration();
+        config.SSID = "test_1234";
+        when(mWifiManager.getWifiApConfiguration()).thenReturn(config);
+
+        mController.displayPreference(mScreen);
+        assertThat(mController.getSSID()).isEqualTo(config.SSID);
+    }
+
+    @Test
+    public void changePreference_shouldUpdateValue() {
+        mController.displayPreference(mScreen);
+        mController.onPreferenceChange(mPreference, "1");
+        assertThat(mController.getSSID()).isEqualTo("1");
+
+        mController.onPreferenceChange(mPreference, "0");
+        assertThat(mController.getSSID()).isEqualTo("0");
+
+        verify(mListener, times(2)).onTetherConfigUpdated();
+    }
+}