fix: 引入Settings的Module

Settings/tests/robotests/src/com/android/settings/DisplaySettingsTest.java

@@ -0,0 +1,38 @@
+package com.android.settings;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.testutils.XmlTestUtils;
+import com.android.settingslib.core.AbstractPreferenceController;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RunWith(RobolectricTestRunner.class)
+public class DisplaySettingsTest {
+
+    @Test
+    public void testPreferenceControllers_getPreferenceKeys_existInPreferenceScreen() {
+        final Context context = ApplicationProvider.getApplicationContext();
+        final DisplaySettings fragment = new DisplaySettings();
+        final List<String> preferenceScreenKeys = XmlTestUtils.getKeysFromPreferenceXml(context,
+                fragment.getPreferenceScreenResId());
+        final List<String> preferenceKeys = new ArrayList<>();
+
+        for (AbstractPreferenceController controller : fragment.createPreferenceControllers(context)) {
+            preferenceKeys.add(controller.getPreferenceKey());
+        }
+        // Nightmode is currently hidden
+        preferenceKeys.remove("night_mode");
+
+        assertThat(preferenceScreenKeys).containsAtLeastElementsIn(preferenceKeys);
+    }
+}