Merge "Add DashboardItemAnimator to stop flash"

tests/robotests/src/com/android/settings/dashboard/DashboardItemAnimatorTest.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2016 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.dashboard;
+
+import android.content.Context;
+import android.widget.TextView;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.dashboard.SupportItemAdapter.ViewHolder;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadows.ShadowApplication;
+
+import static com.google.common.truth.Truth.assertThat;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class DashboardItemAnimatorTest {
+
+    private DashboardItemAnimator mDashboardItemAnimator;
+    private ViewHolder mViewHolder;
+
+    @Before
+    public void SetUp() {
+        final Context context = ShadowApplication.getInstance().getApplicationContext();
+        mDashboardItemAnimator = new DashboardItemAnimator();
+        mViewHolder = new ViewHolder(new TextView(context));
+    }
+
+    @Test
+    public void testAnimateChange_NoOffset_NoPendingAnimation() {
+        final boolean hasPendingAnimation = mDashboardItemAnimator
+                .animateChange(mViewHolder, mViewHolder, 0, 1, 0, 1);
+        assertThat(hasPendingAnimation).isFalse();
+    }
+
+    @Test
+    public void testAnimateChange_HasOffset_HasPendingAnimation() {
+        final boolean hasPendingAnimation = mDashboardItemAnimator
+                .animateChange(mViewHolder, mViewHolder, 0, 0, 1, 1);
+        assertThat(hasPendingAnimation).isTrue();
+    }
+
+}