Add description for Wi-Fi calling mode

Replace the view of dialog with custom view that adds description
as summary.

Test: manual
Bug: 34793636
Change-Id: If9792b0a35c59c1260176b4b2c62107861de73b5
Merged-In: If9792b0a35c59c1260176b4b2c62107861de73b5

tests/robotests/src/com/android/settings/wifi/calling/ListWithEntrySummaryPreferenceTest.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2018 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.calling;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.os.Parcelable;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+
+import com.android.settings.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+import java.io.IOException;
+
+@RunWith(RobolectricTestRunner.class)
+public class ListWithEntrySummaryPreferenceTest {
+
+    private Context mContext;
+    private ListWithEntrySummaryPreference mPreference;
+
+    private CharSequence[] mDefaultEntries =
+            {"default_entry1", "default_entry2", "default_entry3"};
+    private CharSequence[] mDefaultEntryValues = {"0", "1", "2"};
+    private CharSequence[] mDefaultEntrySummaries =
+            {"default_summary1", "default_summary2", "default_summary3"};
+
+    private CharSequence[] mCustomEntries = {"custom_entry1", "custom_entry2"};
+    private CharSequence[] mCustomEntryValues = {"0", "1"};
+    private CharSequence[] mCustomEntrySummaries = {"custom_summary1", "custom_summary2"};
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mPreference = new ListWithEntrySummaryPreference(mContext, null);
+        mPreference.setEntries(mDefaultEntries);
+        mPreference.setEntryValues(mDefaultEntryValues);
+        mPreference.setEntrySummaries(mDefaultEntrySummaries);
+    }
+
+    @Test
+    public void initialize_defaultEntries_shouldDisplayDefalutEntries() {
+        AlertDialog dialog = showDialog(mPreference);
+        ListAdapter adapter = dialog.getListView().getAdapter();
+
+        int len = mDefaultEntries.length;
+        assertThat(adapter.getCount()).isEqualTo(len);
+        for (int i = 0; i < len; i++) {
+            TextView title = adapter.getView(i, null, null).findViewById(R.id.title);
+            TextView summary = adapter.getView(i, null, null).findViewById(R.id.summary);
+            assertThat(title.getText()).isEqualTo(mDefaultEntries[i]);
+            assertThat(summary.getText()).isEqualTo(mDefaultEntrySummaries[i]);
+        }
+    }
+
+    @Test
+    public void setEntries_customEntries_shouldUpdateEntries() {
+        mPreference.setEntries(mCustomEntries);
+        mPreference.setEntryValues(mCustomEntryValues);
+        mPreference.setEntrySummaries(mCustomEntrySummaries);
+
+        AlertDialog dialog = showDialog(mPreference);
+        ListAdapter adapter = dialog.getListView().getAdapter();
+
+        int len = mCustomEntries.length;
+        assertThat(adapter.getCount()).isEqualTo(len);
+        for (int i = 0; i < len; i++) {
+            TextView title = adapter.getView(i, null, null).findViewById(R.id.title);
+            TextView summary = adapter.getView(i, null, null).findViewById(R.id.summary);
+            assertThat(title.getText()).isEqualTo(mCustomEntries[i]);
+            assertThat(summary.getText()).isEqualTo(mCustomEntrySummaries[i]);
+        }
+    }
+
+    @Test
+    public void onSaveAndRestoreInstanceState_resumePreference_shouldNotChangeEntries() {
+        setEntries_customEntries_shouldUpdateEntries();
+
+        final Parcelable parcelable = mPreference.onSaveInstanceState();
+        ListWithEntrySummaryPreference preference
+                = new ListWithEntrySummaryPreference(mContext, null);
+        preference.setEntries(mDefaultEntries);
+        preference.setEntryValues(mDefaultEntryValues);
+        preference.setEntrySummaries(mDefaultEntrySummaries);
+        preference.onRestoreInstanceState(parcelable);
+
+        AlertDialog dialog = showDialog(preference);
+        ListAdapter adapter = dialog.getListView().getAdapter();
+
+        int len = mCustomEntries.length;
+        assertThat(adapter.getCount()).isEqualTo(len);
+        for (int i = 0; i < len; i++) {
+            TextView title = adapter.getView(i, null, null).findViewById(R.id.title);
+            TextView summary = adapter.getView(i, null, null).findViewById(R.id.summary);
+            assertThat(title.getText()).isEqualTo(mCustomEntries[i]);
+            assertThat(summary.getText()).isEqualTo(mCustomEntrySummaries[i]);
+        }
+    }
+
+    private AlertDialog showDialog(ListWithEntrySummaryPreference preference) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
+        preference.onPrepareDialogBuilder(builder, null);
+        return builder.show();
+    }
+}