| /* |
| * 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.documentsui.testing; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.function.Predicate; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * Test {@link Predicate} that can be used to spy on, control responses from, |
| * and make assertions against values tested. |
| */ |
| public class TestPredicate<T> implements Predicate<T> { |
| |
| private @Nullable T lastValue; |
| private boolean nextReturnValue; |
| private boolean called; |
| |
| @Override |
| public boolean test(T t) { |
| called = true; |
| lastValue = t; |
| return nextReturnValue; |
| } |
| |
| public void assertLastArgument(@Nullable T expected) { |
| assertEquals(expected, lastValue); |
| } |
| |
| public void assertCalled() { |
| assertTrue(called); |
| } |
| |
| public void nextReturn(boolean value) { |
| nextReturnValue = value; |
| } |
| } |