Merge "Convert the rest of encryption page into pref controller"

res/xml/encryption_and_credential.xml

@@ -16,6 +16,7 @@
 
 <PreferenceScreen
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:settings="http://schemas.android.com/apk/res/com.android.settings"
     android:title="@string/encryption_and_credential_settings_title"
     android:key="encryption_and_credentials_screen">
 
@@ -39,7 +40,9 @@
 
         <com.android.settingslib.RestrictedPreference
             android:key="credential_storage_type"
-            android:title="@string/credential_storage_type" />
+            android:title="@string/credential_storage_type"
+            android:summary="@string/summary_placeholder"
+            settings:userRestriction="no_config_credentials" />
 
         <Preference
             android:key="trusted_credentials"
@@ -51,12 +54,14 @@
             android:key="user_credentials"
             android:title="@string/user_credentials"
             android:summary="@string/user_credentials_summary"
-            android:fragment="com.android.settings.UserCredentialsSettings" />
+            android:fragment="com.android.settings.UserCredentialsSettings"
+            settings:userRestriction="no_config_credentials" />
 
         <com.android.settingslib.RestrictedPreference
             android:key="credentials_install"
             android:title="@string/credentials_install"
-            android:summary="@string/credentials_install_summary">
+            android:summary="@string/credentials_install_summary"
+            settings:userRestriction="no_config_credentials">
 
             <intent
                 android:action="android.credentials.INSTALL"
@@ -68,7 +73,8 @@
         <com.android.settingslib.RestrictedPreference
             android:key="credentials_reset"
             android:title="@string/credentials_reset"
-            android:summary="@string/credentials_reset_summary">
+            android:summary="@string/credentials_reset_summary"
+            settings:userRestriction="no_config_credentials">
 
             <intent
                 android:action="com.android.credentials.RESET"

src/com/android/settings/security/CredentialStoragePreferenceController.java

@@ -0,0 +1,48 @@
+/*
+ * 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.security;
+
+import android.content.Context;
+import android.os.UserManager;
+import android.security.KeyStore;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.R;
+
+public class CredentialStoragePreferenceController extends
+        RestrictedEncryptionPreferenceController {
+
+    private static final String KEY_CREDENTIAL_STORAGE_TYPE = "credential_storage_type";
+    private final KeyStore mKeyStore;
+
+    public CredentialStoragePreferenceController(Context context) {
+        super(context, UserManager.DISALLOW_CONFIG_CREDENTIALS);
+        mKeyStore = KeyStore.getInstance();
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_CREDENTIAL_STORAGE_TYPE;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        preference.setSummary(mKeyStore.isHardwareBacked()
+                ? R.string.credential_storage_type_hardware
+                : R.string.credential_storage_type_software);
+    }
+}

src/com/android/settings/security/EncryptionAndCredential.java

@@ -17,22 +17,16 @@
 package com.android.settings.security;
 
 import android.content.Context;
-import android.content.Intent;
-import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.SearchIndexableResource;
-import android.security.KeyStore;
-import android.support.v7.preference.PreferenceGroup;
-import android.support.v7.preference.PreferenceScreen;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settings.widget.PreferenceCategoryController;
-import com.android.settingslib.RestrictedLockUtils;
-import com.android.settingslib.RestrictedPreference;
 import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.Lifecycle;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -40,24 +34,11 @@ import java.util.List;
 
 /**
  * Encryption and Credential settings.
- * TODO: Extends this from {@link DashboardFragment} instead
  */
 public class EncryptionAndCredential extends DashboardFragment {
 
     private static final String TAG = "EncryptionAndCredential";
 
-    // Misc Settings
-    private static final String KEY_CREDENTIAL_STORAGE_TYPE = "credential_storage_type";
-    private static final String KEY_USER_CREDENTIALS = "user_credentials";
-    private static final String KEY_RESET_CREDENTIALS = "credentials_reset";
-    private static final String KEY_CREDENTIALS_INSTALL = "credentials_install";
-    private static final String KEY_CREDENTIALS_MANAGER = "credentials_management";
-
-    private static final int MY_USER_ID = UserHandle.myUserId();
-
-    private KeyStore mKeyStore;
-    private RestrictedPreference mResetCredentials;
-
     @Override
     public int getMetricsCategory() {
         return MetricsEvent.ENCRYPTION_AND_CREDENTIAL;
@@ -70,7 +51,7 @@ public class EncryptionAndCredential extends DashboardFragment {
 
     @Override
     protected List<AbstractPreferenceController> getPreferenceControllers(Context context) {
-        return buildPreferenceControllers(context);
+        return buildPreferenceControllers(context, getLifecycle());
     }
 
     @Override
@@ -78,7 +59,8 @@ public class EncryptionAndCredential extends DashboardFragment {
         return R.xml.encryption_and_credential;
     }
 
-    private static List<AbstractPreferenceController> buildPreferenceControllers(Context context) {
+    private static List<AbstractPreferenceController> buildPreferenceControllers(Context context,
+            Lifecycle lifecycle) {
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
         final EncryptionStatusPreferenceController encryptStatusController =
                 new EncryptionStatusPreferenceController(context);
@@ -86,76 +68,13 @@ public class EncryptionAndCredential extends DashboardFragment {
         controllers.add(new PreferenceCategoryController(context,
                 "encryption_and_credentials_status_category",
                 Arrays.asList(encryptStatusController)));
+        controllers.add(new CredentialStoragePreferenceController(context));
+        controllers.add(new UserCredentialsPreferenceController(context));
+        controllers.add(new ResetCredentialsPreferenceController(context, lifecycle));
+        controllers.add(new InstallCredentialsPreferenceController(context));
         return controllers;
     }
 
-    /**
-     * Important!
-     *
-     * Don't forget to update the SecuritySearchIndexProvider if you are doing any change in the
-     * logic or adding/removing preferences here.
-     */
-    private PreferenceScreen createPreferenceHierarchy() {
-        final PreferenceScreen root = getPreferenceScreen();
-        // Credential storage
-        mKeyStore = KeyStore.getInstance(); // needs to be initialized for onResume()
-
-        if (!RestrictedLockUtils.hasBaseUserRestriction(getActivity(),
-                UserManager.DISALLOW_CONFIG_CREDENTIALS, MY_USER_ID)) {
-            RestrictedPreference userCredentials = (RestrictedPreference) root.findPreference(
-                    KEY_USER_CREDENTIALS);
-            userCredentials.checkRestrictionAndSetDisabled(
-                    UserManager.DISALLOW_CONFIG_CREDENTIALS);
-            RestrictedPreference credentialStorageType = (RestrictedPreference) root.findPreference(
-                    KEY_CREDENTIAL_STORAGE_TYPE);
-            credentialStorageType.checkRestrictionAndSetDisabled(
-                    UserManager.DISALLOW_CONFIG_CREDENTIALS);
-            RestrictedPreference installCredentials = (RestrictedPreference) root.findPreference(
-                    KEY_CREDENTIALS_INSTALL);
-            installCredentials.checkRestrictionAndSetDisabled(
-                    UserManager.DISALLOW_CONFIG_CREDENTIALS);
-            mResetCredentials = (RestrictedPreference) root.findPreference(KEY_RESET_CREDENTIALS);
-            mResetCredentials.checkRestrictionAndSetDisabled(
-                    UserManager.DISALLOW_CONFIG_CREDENTIALS);
-
-            final int storageSummaryRes =
-                    mKeyStore.isHardwareBacked() ? R.string.credential_storage_type_hardware
-                            : R.string.credential_storage_type_software;
-            credentialStorageType.setSummary(storageSummaryRes);
-        } else {
-            PreferenceGroup credentialsManager = (PreferenceGroup)
-                    root.findPreference(KEY_CREDENTIALS_MANAGER);
-            credentialsManager.removePreference(root.findPreference(KEY_RESET_CREDENTIALS));
-            credentialsManager.removePreference(root.findPreference(KEY_CREDENTIALS_INSTALL));
-            credentialsManager.removePreference(root.findPreference(KEY_CREDENTIAL_STORAGE_TYPE));
-            credentialsManager.removePreference(root.findPreference(KEY_USER_CREDENTIALS));
-        }
-
-        return root;
-    }
-
-    @Override
-    public void onResume() {
-        super.onResume();
-
-        // Make sure we reload the preference hierarchy since some of these settings
-        // depend on others...
-        createPreferenceHierarchy();
-
-        if (mResetCredentials != null && !mResetCredentials.isDisabledByAdmin()) {
-            mResetCredentials.setEnabled(!mKeyStore.isEmpty());
-        }
-    }
-
-    /**
-     * see confirmPatternThenDisableAndClear
-     */
-    @Override
-    public void onActivityResult(int requestCode, int resultCode, Intent data) {
-        super.onActivityResult(requestCode, resultCode, data);
-        createPreferenceHierarchy();
-    }
-
     @Override
     protected int getHelpResource() {
         return R.string.help_url_encryption;
@@ -179,7 +98,7 @@ public class EncryptionAndCredential extends DashboardFragment {
 
         @Override
         public List<AbstractPreferenceController> getPreferenceControllers(Context context) {
-            return buildPreferenceControllers(context);
+            return buildPreferenceControllers(context, null /* lifecycle */);
         }
 
         @Override
@@ -187,25 +106,5 @@ public class EncryptionAndCredential extends DashboardFragment {
             final UserManager um = (UserManager) context.getSystemService(Context.USER_SERVICE);
             return um.isAdminUser();
         }
-
-        @Override
-        public List<String> getNonIndexableKeys(Context context) {
-            final List<String> keys = super.getNonIndexableKeys(context);
-            if (!isPageSearchEnabled(context)) {
-                return keys;
-            }
-            final UserManager um = (UserManager) context.getSystemService(Context.USER_SERVICE);
-
-            if (um.hasUserRestriction(UserManager.DISALLOW_CONFIG_CREDENTIALS)) {
-                keys.add(KEY_CREDENTIALS_MANAGER);
-                keys.add(KEY_RESET_CREDENTIALS);
-                keys.add(KEY_CREDENTIALS_INSTALL);
-                keys.add(KEY_CREDENTIAL_STORAGE_TYPE);
-                keys.add(KEY_USER_CREDENTIALS);
-            }
-
-            return keys;
-        }
     }
-
 }

src/com/android/settings/security/InstallCredentialsPreferenceController.java

@@ -0,0 +1,35 @@
+/*
+ * 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.security;
+
+import android.content.Context;
+import android.os.UserManager;
+
+public class InstallCredentialsPreferenceController extends
+        RestrictedEncryptionPreferenceController {
+
+    private static final String KEY_CREDENTIALS_INSTALL = "credentials_install";
+
+    public InstallCredentialsPreferenceController(Context context) {
+        super(context, UserManager.DISALLOW_CONFIG_CREDENTIALS);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_CREDENTIALS_INSTALL;
+    }
+}

src/com/android/settings/security/ResetCredentialsPreferenceController.java

@@ -0,0 +1,63 @@
+/*
+ * 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.security;
+
+import android.content.Context;
+import android.os.UserManager;
+import android.security.KeyStore;
+import android.support.v7.preference.PreferenceScreen;
+
+import com.android.settingslib.RestrictedPreference;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnResume;
+
+public class ResetCredentialsPreferenceController extends RestrictedEncryptionPreferenceController
+        implements LifecycleObserver, OnResume {
+
+    private static final String KEY_RESET_CREDENTIALS = "credentials_reset";
+
+    private final KeyStore mKeyStore;
+
+    private RestrictedPreference mPreference;
+
+    public ResetCredentialsPreferenceController(Context context, Lifecycle lifecycle) {
+        super(context, UserManager.DISALLOW_CONFIG_CREDENTIALS);
+        mKeyStore = KeyStore.getInstance();
+        if (lifecycle != null) {
+            lifecycle.addObserver(this);
+        }
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_RESET_CREDENTIALS;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = (RestrictedPreference) screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void onResume() {
+        if (mPreference != null && !mPreference.isDisabledByAdmin()) {
+            mPreference.setEnabled(!mKeyStore.isEmpty());
+        }
+    }
+}

src/com/android/settings/security/RestrictedEncryptionPreferenceController.java

@@ -0,0 +1,45 @@
+/*
+ * 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.security;
+
+import android.content.Context;
+import android.os.UserHandle;
+import android.os.UserManager;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.AbstractPreferenceController;
+
+public abstract class RestrictedEncryptionPreferenceController extends
+        AbstractPreferenceController implements PreferenceControllerMixin {
+
+    protected final UserManager mUserManager;
+
+    private final UserHandle mUserHandle;
+    private final String mUserRestriction;
+
+    public RestrictedEncryptionPreferenceController(Context context, String userRestriction) {
+        super(context);
+        mUserHandle = UserHandle.of(UserHandle.myUserId());
+        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
+        mUserRestriction = userRestriction;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return !mUserManager.hasBaseUserRestriction(mUserRestriction, mUserHandle);
+    }
+}

src/com/android/settings/security/UserCredentialsPreferenceController.java

@@ -0,0 +1,35 @@
+/*
+ * 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.security;
+
+import android.content.Context;
+import android.os.UserManager;
+
+public class UserCredentialsPreferenceController extends
+        RestrictedEncryptionPreferenceController {
+
+    private static final String KEY_USER_CREDENTIALS = "user_credentials";
+
+    public UserCredentialsPreferenceController(Context context) {
+        super(context, UserManager.DISALLOW_CONFIG_CREDENTIALS);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_USER_CREDENTIALS;
+    }
+}

tests/robotests/src/com/android/settings/security/CredentialStoragePreferenceControllerTest.java

@@ -0,0 +1,72 @@
+/*
+ * 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.security;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.R;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.ShadowKeyStore;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION_O,
+        shadows = {
+                ShadowKeyStore.class
+        })
+public class CredentialStoragePreferenceControllerTest {
+
+    private Context mContext;
+    private CredentialStoragePreferenceController mController;
+    private Preference mPreference;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mController = new CredentialStoragePreferenceController(mContext);
+        mPreference = new Preference(mContext);
+    }
+
+    @Test
+    public void updateState_hardwareBacked_showHardwareSummary() {
+        ShadowKeyStore.setHardwareBacked(true);
+
+        mController.updateState(mPreference);
+
+        assertThat(mPreference.getSummary())
+                .isEqualTo(mContext.getText(R.string.credential_storage_type_hardware));
+    }
+
+    @Test
+    public void updateState_hardwareBacked_showSoftwareSummary() {
+        ShadowKeyStore.setHardwareBacked(false);
+
+        mController.updateState(mPreference);
+
+        assertThat(mPreference.getSummary())
+                .isEqualTo(mContext.getText(R.string.credential_storage_type_software));
+    }
+}

tests/robotests/src/com/android/settings/security/EncryptionStatusPreferenceControllerTest.java

@@ -34,7 +34,7 @@ import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 
 @RunWith(SettingsRobolectricTestRunner.class)
-@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION,
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION_O,
         shadows = {
                 ShadowUserManager.class,
                 ShadowLockPatternUtils.class

tests/robotests/src/com/android/settings/security/RestrictedEncryptionPreferenceControllerTest.java

@@ -0,0 +1,86 @@
+/*
+ * 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.security;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.os.UserManager;
+
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.ShadowUserManager;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION_O,
+        shadows = {
+                ShadowUserManager.class
+        })
+public class RestrictedEncryptionPreferenceControllerTest {
+
+    private Context mContext;
+    private ShadowUserManager mUserManager;
+    private CredentialStoragePreferenceController mCredentialStoragePreferenceController;
+    private InstallCredentialsPreferenceController mInstallCredentialsPreferenceController;
+    private ResetCredentialsPreferenceController mResetCredentialsPreferenceController;
+    private UserCredentialsPreferenceController mUserCredentialsPreferenceController;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mCredentialStoragePreferenceController =
+                new CredentialStoragePreferenceController(mContext);
+        mInstallCredentialsPreferenceController =
+                new InstallCredentialsPreferenceController(mContext);
+        mResetCredentialsPreferenceController =
+                new ResetCredentialsPreferenceController(mContext, new Lifecycle());
+        mUserCredentialsPreferenceController =
+                new UserCredentialsPreferenceController(mContext);
+        mUserManager = ShadowUserManager.getShadow();
+    }
+
+    @After
+    public void tearDown() {
+        mUserManager.reset();
+    }
+
+    @Test
+    public void isAvailable_noRestriction_shouldReturnTrue() {
+        assertThat(mCredentialStoragePreferenceController.isAvailable()).isTrue();
+        assertThat(mInstallCredentialsPreferenceController.isAvailable()).isTrue();
+        assertThat(mResetCredentialsPreferenceController.isAvailable()).isTrue();
+        assertThat(mUserCredentialsPreferenceController.isAvailable()).isTrue();
+    }
+
+    @Test
+    public void isAvailable_hasRestriction_shouldReturnFalse() {
+        mUserManager.addBaseUserRestriction(UserManager.DISALLOW_CONFIG_CREDENTIALS);
+
+        assertThat(mCredentialStoragePreferenceController.isAvailable()).isFalse();
+        assertThat(mInstallCredentialsPreferenceController.isAvailable()).isFalse();
+        assertThat(mResetCredentialsPreferenceController.isAvailable()).isFalse();
+        assertThat(mUserCredentialsPreferenceController.isAvailable()).isFalse();
+    }
+}

tests/robotests/src/com/android/settings/testutils/shadow/ShadowKeyStore.java

@@ -0,0 +1,43 @@
+/*
+ * 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.testutils.shadow;
+
+import android.security.KeyStore;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.annotation.Resetter;
+
+@Implements(KeyStore.class)
+public class ShadowKeyStore {
+
+    private static boolean sIsHardwareBacked;
+
+    @Resetter
+    public void reset() {
+        sIsHardwareBacked = false;
+    }
+
+    @Implementation
+    public boolean isHardwareBacked() {
+        return sIsHardwareBacked;
+    }
+
+    public static void setHardwareBacked(boolean hardwareBacked) {
+        sIsHardwareBacked = hardwareBacked;
+    }
+}

tests/robotests/src/com/android/settings/testutils/shadow/ShadowUserManager.java

@@ -19,30 +19,36 @@ package com.android.settings.testutils.shadow;
 import android.annotation.UserIdInt;
 import android.content.Context;
 import android.content.pm.UserInfo;
+import android.os.UserHandle;
 import android.os.UserManager;
 import android.util.SparseArray;
 
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Implementation;
 import org.robolectric.annotation.Implements;
+import org.robolectric.annotation.Resetter;
 import org.robolectric.shadow.api.Shadow;
 
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-/**
- * This class provides the API 24 implementation of UserManager.get(Context).
- */
 @Implements(UserManager.class)
 public class ShadowUserManager extends org.robolectric.shadows.ShadowUserManager {
 
     private SparseArray<UserInfo> mUserInfos = new SparseArray<>();
     private boolean mAdminUser;
+    private List<String> mRestrictions = new ArrayList<>();
 
     public void setIsAdminUser(boolean isAdminUser) {
         mAdminUser = isAdminUser;
     }
 
+    @Resetter
+    public void reset() {
+        mRestrictions.clear();
+    }
+
     @Implementation
     public boolean isAdminUser() {
         return mAdminUser;
@@ -72,6 +78,15 @@ public class ShadowUserManager extends org.robolectric.shadows.ShadowUserManager
         return (UserManager) context.getSystemService(Context.USER_SERVICE);
     }
 
+    @Implementation
+    public boolean hasBaseUserRestriction(String restrictionKey, UserHandle userHandle) {
+        return mRestrictions.contains(restrictionKey);
+    }
+
+    public void addBaseUserRestriction(String restriction) {
+        mRestrictions.add(restriction);
+    }
+
     public static ShadowUserManager getShadow() {
         return (ShadowUserManager) Shadow.extract(
                 RuntimeEnvironment.application.getSystemService(UserManager.class));