| /* |
| * Copyright (C) 2015 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 androidx.leanback.widget; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import android.support.test.InstrumentationRegistry; |
| import android.support.test.filters.SmallTest; |
| import android.support.test.runner.AndroidJUnit4; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| /** |
| * Tests for {@link PagingIndicator}. |
| */ |
| @SmallTest |
| @RunWith(AndroidJUnit4.class) |
| public class PagingIndicatorTest { |
| private PagingIndicator mIndicator; |
| |
| @Before |
| public void setup() throws Exception { |
| mIndicator = new PagingIndicator(InstrumentationRegistry.getTargetContext()); |
| } |
| |
| @Test |
| public void testDotPosition() { |
| mIndicator.setPageCount(3); |
| assertDotPosition(); |
| mIndicator.setPageCount(6); |
| assertDotPosition(); |
| mIndicator.setPageCount(9); |
| assertDotPosition(); |
| } |
| |
| private void assertDotPosition() { |
| assertSymmetry(); |
| assertDistance(); |
| } |
| |
| private void assertSymmetry() { |
| int pageCount = mIndicator.getPageCount(); |
| int mid = pageCount / 2; |
| int[] selectedX = mIndicator.getDotSelectedX(); |
| int sum = selectedX[0] + selectedX[pageCount - 1]; |
| for (int i = 1; i <= mid; ++i) { |
| assertEquals("Selected dots are not symmetric", sum, |
| selectedX[i] + selectedX[pageCount - i - 1]); |
| } |
| int[] leftX = mIndicator.getDotSelectedLeftX(); |
| int[] rightX = mIndicator.getDotSelectedRightX(); |
| sum = leftX[0] + rightX[pageCount - 1]; |
| for (int i = 1; i < pageCount - 1; ++i) { |
| assertEquals("Deselected dots are not symmetric", sum, |
| leftX[i] + rightX[pageCount - i - 1]); |
| } |
| } |
| |
| private void assertDistance() { |
| int pageCount = mIndicator.getPageCount(); |
| int[] selectedX = mIndicator.getDotSelectedX(); |
| int[] leftX = mIndicator.getDotSelectedLeftX(); |
| int[] rightX = mIndicator.getDotSelectedRightX(); |
| int distance = selectedX[1] - selectedX[0]; |
| for (int i = 2; i < pageCount; ++i) { |
| assertEquals("Gaps between selected dots are not even", distance, |
| selectedX[i] - selectedX[i - 1]); |
| } |
| distance = leftX[1] - leftX[0]; |
| for (int i = 2; i < pageCount - 1; ++i) { |
| assertEquals("Gaps between left dots are not even", distance, |
| leftX[i] - leftX[i - 1]); |
| } |
| distance = rightX[2] - rightX[1]; |
| for (int i = 3; i < pageCount; ++i) { |
| assertEquals("Gaps between right dots are not even", distance, |
| rightX[i] - rightX[i - 1]); |
| } |
| } |
| } |