[SetupWizardLib] Add tests for BottomScrollView
Test that BottomScrollView callbacks are called correctly. Change-Id: Ia2e9e4149057b06794cdf85ba07c44efc0aec579
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@ -21,6 +21,8 @@ import android.util.AttributeSet;
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import android.view.View;
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import android.widget.ScrollView;
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import com.android.annotations.VisibleForTesting;
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/**
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* An extension of ScrollView that will invoke a listener callback when the ScrollView needs
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* scrolling, and when the ScrollView is being scrolled to the bottom. This is often used in Setup
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@ -60,13 +62,17 @@ public class BottomScrollView extends ScrollView {
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mListener = l;
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}
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@VisibleForTesting
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public int getScrollThreshold() {
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return mScrollThreshold;
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}
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@Override
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protected void onLayout(boolean changed, int l, int t, int r, int b) {
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super.onLayout(changed, l, t, r, b);
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View child = getChildAt(0);
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final View child = getChildAt(0);
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if (child != null) {
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mScrollThreshold = Math.max(0, getChildAt(0).getHeight() - b + t
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- getPaddingBottom());
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mScrollThreshold = Math.max(0, child.getMeasuredHeight() - b + t - getPaddingBottom());
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}
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if (b - t > 0) {
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// Post check scroll in the next run loop, so that the callback methods will be invoked
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@ -0,0 +1,125 @@
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.setupwizardlib.test;
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import android.content.Context;
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import android.test.AndroidTestCase;
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import android.test.suitebuilder.annotation.SmallTest;
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import android.view.View;
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import com.android.setupwizardlib.view.BottomScrollView;
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public class BottomScrollViewTest extends AndroidTestCase {
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private TestBottomScrollListener mListener;
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@Override
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protected void setUp() throws Exception {
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super.setUp();
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mListener = new TestBottomScrollListener();
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}
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@SmallTest
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public void testNoNeedScroll() {
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createScrollView(20);
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assertTrue("Scroll should not be required", mListener.scrolledToBottom);
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}
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@SmallTest
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public void testNeedScroll() {
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createScrollView(110);
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assertFalse("Scroll should be required", mListener.scrolledToBottom);
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}
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@SmallTest
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public void testScrollToBottom() {
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final BottomScrollView bottomScrollView = createScrollView(110);
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assertFalse("Scroll should be required", mListener.scrolledToBottom);
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bottomScrollView.scrollTo(0, 10);
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assertTrue("Should already be scrolled to bottom", mListener.scrolledToBottom);
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}
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@SmallTest
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public void testScrollThreshold() {
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final BottomScrollView bottomScrollView = createScrollView(110);
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assertEquals("Scroll threshold should be 10", 10, bottomScrollView.getScrollThreshold());
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}
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private BottomScrollView createScrollView(final int childHeight) {
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final BottomScrollView bottomScrollView = new TestBottomScrollView(getContext());
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bottomScrollView.setBottomScrollListener(mListener);
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final View child = new TestChildView(getContext(), childHeight);
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child.measure(0, 0); // TestChildView's measured dimensions doesn't depend on the arguments
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bottomScrollView.addView(child);
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bottomScrollView.layout(0, 0, 100, 100);
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return bottomScrollView;
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}
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private static class TestChildView extends View {
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private static final int WIDTH = 10;
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private int mHeight;
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public TestChildView(Context context, int height) {
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super(context);
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mHeight = height;
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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setMeasuredDimension(WIDTH, mHeight);
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}
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public void setHeight(int height) {
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mHeight = height;
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}
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}
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private static class TestBottomScrollView extends BottomScrollView {
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public TestBottomScrollView(Context context) {
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super(context);
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}
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@Override
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public boolean post(Runnable action) {
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// Post all runnables synchronously so that tests can check the callbacks.
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action.run();
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return true;
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}
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}
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private static class TestBottomScrollListener implements BottomScrollView.BottomScrollListener {
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boolean scrolledToBottom = true;
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@Override
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public void onScrolledToBottom() {
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scrolledToBottom = true;
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}
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@Override
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public void onRequiresScroll() {
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scrolledToBottom = false;
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}
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}
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}
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