[DO NOT MERGE] Modify Wi-Fi details settings to restricted style

- Show restricted text in guest mode

- Screenshot:
  https://screenshot.googleplex.com/6nYcmazMM46TxaB

Bug: 177573895
Test: manual test
make RunSettingsRoboTests \
       ROBOTEST_FILTER=WifiNetworkDetailsFragmentTest

Change-Id: I5f857b2079e0f550e4be601d27dd54dac56b2f57
Merged-In: I5f857b2079e0f550e4be601d27dd54dac56b2f57

tests/robotests/src/com/android/settings/wifi/details/WifiNetworkDetailsFragmentTest.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2021 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.details;
+
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.widget.TextView;
+
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+
+@RunWith(RobolectricTestRunner.class)
+public class WifiNetworkDetailsFragmentTest {
+
+    @Mock
+    Menu mMenu;
+    private WifiNetworkDetailsFragment mFragment;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mFragment = new WifiNetworkDetailsFragment();
+    }
+
+    @Test
+    public void onCreateOptionsMenu_uiRestricted_shouldNotAddEditMenu() {
+        mFragment.mIsUiRestricted = true;
+
+        mFragment.onCreateOptionsMenu(mMenu, mock(MenuInflater.class));
+
+        verify(mMenu, never()).add(anyInt(), anyInt(), anyInt(), eq(R.string.wifi_modify));
+    }
+
+    @Test
+    public void restrictUi_shouldShowRestrictedText() {
+        final WifiNetworkDetailsFragmentTest.FakeFragment
+                fragment = spy(new WifiNetworkDetailsFragmentTest.FakeFragment());
+        final PreferenceScreen screen = mock(PreferenceScreen.class);
+        final TextView restrictedText = mock(TextView.class);
+        doReturn(screen).when(fragment).getPreferenceScreen();
+        doReturn(false).when(fragment).isUiRestrictedByOnlyAdmin();
+        doReturn(restrictedText).when(fragment).getEmptyTextView();
+
+        fragment.restrictUi();
+
+        verify(restrictedText).setText(anyInt());
+    }
+
+    @Test
+    public void restrictUi_shouldRemoveAllPreferences() {
+        final WifiNetworkDetailsFragmentTest.FakeFragment
+                fragment = spy(new WifiNetworkDetailsFragmentTest.FakeFragment());
+        final PreferenceScreen screen = mock(PreferenceScreen.class);
+        doReturn(screen).when(fragment).getPreferenceScreen();
+        doReturn(true).when(fragment).isUiRestrictedByOnlyAdmin();
+
+        fragment.restrictUi();
+
+        verify(screen).removeAll();
+    }
+
+    // Fake WifiNetworkDetailsFragment to override the protected method as public.
+    public class FakeFragment extends WifiNetworkDetailsFragment {
+        @Override
+        public boolean isUiRestrictedByOnlyAdmin() {
+            return super.isUiRestrictedByOnlyAdmin();
+        }
+    }
+}