'Free up space' uses CardPreference

For material next style.

Bug: 188599776
Test: make RunSettingsRoboTests ROBOTEST_FILTER=CardPreferenceTest
Change-Id: Ibaf4d11ab44017453498676db00cff1e49c83b9d

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

@@ -18,13 +18,26 @@ package com.android.settings.widget;
 
 import static com.google.common.truth.Truth.assertThat;
 
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+
 import android.content.Context;
+import android.view.View;
+
+import androidx.annotation.ColorInt;
+import androidx.preference.PreferenceViewHolder;
 
 import com.android.settings.R;
 
+import com.google.android.material.card.MaterialCardView;
+
 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;
 import org.robolectric.RuntimeEnvironment;
 
@@ -33,12 +46,20 @@ public class CardPreferenceTest {
 
     private Context mContext;
     private CardPreference mCardPreference;
+    @Mock
+    private PreferenceViewHolder mPreferenceViewHolder;
+    @Mock
+    private MaterialCardView mCardView;
 
     @Before
     public void setUp() {
+        MockitoAnnotations.initMocks(this);
+
         mContext = RuntimeEnvironment.application;
         mContext.setTheme(R.style.SettingsPreferenceTheme);
         mCardPreference = new CardPreference(mContext);
+        mPreferenceViewHolder = spy(PreferenceViewHolder.createInstanceForTests(mock(View.class)));
+        doReturn(mCardView).when(mPreferenceViewHolder).findViewById(R.id.container);
     }
 
     @Test
@@ -46,4 +67,13 @@ public class CardPreferenceTest {
         assertThat(mCardPreference.getLayoutResource()).isEqualTo(R.layout.card_preference_layout);
     }
 
+    @Test
+    public void setCardBackgroundColor_shouldUseCorrectColor() {
+        final @ColorInt int testColor = 0xABCDEF;
+
+        mCardPreference.setCardBackgroundColor(testColor);
+        mCardPreference.onBindViewHolder(mPreferenceViewHolder);
+
+        verify(mCardView).setCardBackgroundColor(testColor);
+    }
 }