Rename PagedRecyclerView to CarUiRecyclerView

Bug: 141929277
Test: Manual, robolectric
Change-Id: I5651f46408e5771f7f70715ded46b17fe6bfc6f2
diff --git a/car-ui-lib/tests/robotests/src/com/android/car/ui/recyclerview/DefaultScrollBarTest.java b/car-ui-lib/tests/robotests/src/com/android/car/ui/recyclerview/DefaultScrollBarTest.java
new file mode 100644
index 0000000..65b01a8
--- /dev/null
+++ b/car-ui-lib/tests/robotests/src/com/android/car/ui/recyclerview/DefaultScrollBarTest.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2019 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.car.ui.recyclerview;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertThrows;
+
+import android.content.Context;
+import android.widget.FrameLayout;
+
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.android.car.ui.CarUiRobolectricTestRunner;
+import com.android.car.ui.TestConfig;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(CarUiRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class DefaultScrollBarTest {
+
+    private Context mContext;
+    private ScrollBar mScrollBar;
+
+    @Mock
+    private RecyclerView mRecyclerView;
+    @Mock
+    private FrameLayout mParent;
+    @Mock
+    private FrameLayout.LayoutParams mLayoutParams;
+    @Mock
+    private RecyclerView.RecycledViewPool mRecycledViewPool;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+
+        mScrollBar = new DefaultScrollBar();
+    }
+
+    @Test
+    public void initialize_shouldInitializeScrollListener() {
+        when(mRecyclerView.getContext()).thenReturn(mContext);
+        when(mRecyclerView.getParent()).thenReturn(mParent);
+        when(mRecyclerView.getRecycledViewPool()).thenReturn(mRecycledViewPool);
+        when(mParent.generateLayoutParams(any())).thenReturn(mLayoutParams);
+
+        mScrollBar.initialize(mRecyclerView, 10, CarUiRecyclerView.ScrollBarPosition.START, true);
+
+        // called once in DefaultScrollBar and once in SnapHelper while setting up the call backs
+        // when we use attachToRecyclerView(recyclerview)
+        verify(mRecyclerView, times(2)).addOnScrollListener(
+                any(RecyclerView.OnScrollListener.class));
+    }
+
+    @Test
+    public void initialize_shouldSetMaxRecyclerViews() {
+        when(mRecyclerView.getContext()).thenReturn(mContext);
+        when(mRecyclerView.getParent()).thenReturn(mParent);
+        when(mRecyclerView.getRecycledViewPool()).thenReturn(mRecycledViewPool);
+        when(mParent.generateLayoutParams(any())).thenReturn(mLayoutParams);
+
+        mScrollBar.initialize(mRecyclerView, 10, CarUiRecyclerView.ScrollBarPosition.START, true);
+
+        verify(mRecycledViewPool).setMaxRecycledViews(0, 12);
+    }
+
+    @Test
+    public void initialize_shouldNotHaveFlingListener() {
+        when(mRecyclerView.getContext()).thenReturn(mContext);
+        when(mRecyclerView.getParent()).thenReturn(mParent);
+        when(mRecyclerView.getRecycledViewPool()).thenReturn(mRecycledViewPool);
+        when(mParent.generateLayoutParams(any())).thenReturn(mLayoutParams);
+
+        mScrollBar.initialize(mRecyclerView, 10, CarUiRecyclerView.ScrollBarPosition.START, true);
+
+        verify(mRecyclerView).setOnFlingListener(null);
+    }
+
+    @Test
+    public void setPadding_shouldSetStartAndEndPadding() {
+        when(mRecyclerView.getContext()).thenReturn(mContext);
+        when(mRecyclerView.getParent()).thenReturn(mParent);
+        when(mRecyclerView.getRecycledViewPool()).thenReturn(mRecycledViewPool);
+        when(mParent.generateLayoutParams(any())).thenReturn(mLayoutParams);
+
+        mScrollBar.initialize(mRecyclerView, 10, CarUiRecyclerView.ScrollBarPosition.START, true);
+        mScrollBar.setPadding(10, 20);
+
+        DefaultScrollBar defaultScrollBar = (DefaultScrollBar) mScrollBar;
+
+        assertThat(defaultScrollBar.mPaddingStart).isEqualTo(10);
+        assertThat(defaultScrollBar.mPaddingEnd).isEqualTo(20);
+    }
+
+    @Test
+    public void setPadding_shouldThrowErrorWithoutInitialization() {
+        assertThrows(NullPointerException.class, () -> mScrollBar.setPadding(10, 20));
+    }
+
+    @Test
+    public void requestLayout_shouldThrowErrorWithoutInitialization() {
+        assertThrows(NullPointerException.class, () -> mScrollBar.requestLayout());
+    }
+}