| /* |
| * Copyright (C) 2020 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.matchers; |
| |
| import android.view.View; |
| import android.view.ViewGroup; |
| |
| import org.hamcrest.Description; |
| import org.hamcrest.Matcher; |
| import org.hamcrest.TypeSafeMatcher; |
| |
| public class NthChildMatcher extends TypeSafeMatcher<View> { |
| |
| private Matcher<View> mParentMatcher; |
| private int mPosition; |
| |
| public NthChildMatcher(Matcher<View> parentMatcher, int position) { |
| mParentMatcher = parentMatcher; |
| mPosition = position; |
| } |
| |
| @Override |
| public void describeTo(Description description) { |
| description.appendText("position " + mPosition + " of parent "); |
| mParentMatcher.describeTo(description); |
| } |
| |
| @Override |
| public boolean matchesSafely(View view) { |
| if (!(view.getParent() instanceof ViewGroup)) { |
| return false; |
| } |
| |
| ViewGroup parent = (ViewGroup) view.getParent(); |
| |
| return mParentMatcher.matches(parent) |
| && parent.getChildCount() > mPosition |
| && view.equals(parent.getChildAt(mPosition)); |
| } |
| } |