1*f585d8a3SJacky Wang /* 2*f585d8a3SJacky Wang * Copyright (C) 2014 The Dagger Authors. 3*f585d8a3SJacky Wang * 4*f585d8a3SJacky Wang * Licensed under the Apache License, Version 2.0 (the "License"); 5*f585d8a3SJacky Wang * you may not use this file except in compliance with the License. 6*f585d8a3SJacky Wang * You may obtain a copy of the License at 7*f585d8a3SJacky Wang * 8*f585d8a3SJacky Wang * http://www.apache.org/licenses/LICENSE-2.0 9*f585d8a3SJacky Wang * 10*f585d8a3SJacky Wang * Unless required by applicable law or agreed to in writing, software 11*f585d8a3SJacky Wang * distributed under the License is distributed on an "AS IS" BASIS, 12*f585d8a3SJacky Wang * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13*f585d8a3SJacky Wang * See the License for the specific language governing permissions and 14*f585d8a3SJacky Wang * limitations under the License. 15*f585d8a3SJacky Wang */ 16*f585d8a3SJacky Wang 17*f585d8a3SJacky Wang package dagger.internal; 18*f585d8a3SJacky Wang 19*f585d8a3SJacky Wang import static com.google.common.truth.Truth.assertThat; 20*f585d8a3SJacky Wang 21*f585d8a3SJacky Wang import java.util.concurrent.atomic.AtomicInteger; 22*f585d8a3SJacky Wang import javax.inject.Provider; 23*f585d8a3SJacky Wang import org.junit.Test; 24*f585d8a3SJacky Wang import org.junit.runner.RunWith; 25*f585d8a3SJacky Wang import org.junit.runners.JUnit4; 26*f585d8a3SJacky Wang 27*f585d8a3SJacky Wang /** 28*f585d8a3SJacky Wang * Tests {@link SingleCheck}. 29*f585d8a3SJacky Wang */ 30*f585d8a3SJacky Wang @RunWith(JUnit4.class) 31*f585d8a3SJacky Wang public class SingleCheckTest { 32*f585d8a3SJacky Wang @Test(expected = NullPointerException.class) create_nullPointerException()33*f585d8a3SJacky Wang public void create_nullPointerException() { 34*f585d8a3SJacky Wang SingleCheck.provider(null); 35*f585d8a3SJacky Wang } 36*f585d8a3SJacky Wang 37*f585d8a3SJacky Wang @Test get()38*f585d8a3SJacky Wang public void get() { 39*f585d8a3SJacky Wang AtomicInteger integer = new AtomicInteger(); 40*f585d8a3SJacky Wang Provider<Integer> provider = SingleCheck.provider(integer::getAndIncrement); 41*f585d8a3SJacky Wang assertThat(provider.get()).isEqualTo(0); 42*f585d8a3SJacky Wang assertThat(provider.get()).isEqualTo(0); 43*f585d8a3SJacky Wang assertThat(provider.get()).isEqualTo(0); 44*f585d8a3SJacky Wang } 45*f585d8a3SJacky Wang } 46