87 lines
2.9 KiB
Java
87 lines
2.9 KiB
Java
/*
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* Copyright (C) 2014 The Dagger Authors.
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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 dagger.internal;
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import static com.google.common.truth.Truth.assertThat;
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import com.google.common.collect.ImmutableSet;
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import java.util.Arrays;
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import java.util.LinkedHashSet;
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import java.util.Set;
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import java.util.concurrent.atomic.AtomicInteger;
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import javax.inject.Provider;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.rules.ExpectedException;
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import org.junit.runner.RunWith;
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import org.junit.runners.JUnit4;
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@RunWith(JUnit4.class)
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@SuppressWarnings("unchecked")
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public class SetFactoryTest {
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@Rule public ExpectedException thrown = ExpectedException.none();
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@Test
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public void providerReturnsNull() {
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Factory<Set<Integer>> factory =
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SetFactory.<Integer>builder(0, 1).addCollectionProvider(() -> null).build();
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thrown.expect(NullPointerException.class);
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factory.get();
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}
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@Test
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public void providerReturnsNullSet() {
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Factory<Set<Integer>> factory =
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SetFactory.<Integer>builder(1, 0).addProvider(() -> null).build();
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thrown.expect(NullPointerException.class);
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factory.get();
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}
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@Test
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public void providerReturnsSetWithNullElement() {
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Set<Integer> set = new LinkedHashSet<>(Arrays.asList(1, null, 3));
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Factory<Set<Integer>> factory =
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SetFactory.<Integer>builder(0, 1).addCollectionProvider(() -> set).build();
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thrown.expect(NullPointerException.class);
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factory.get();
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}
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@Test
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public void invokesProvidersEveryTime() {
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Factory<Set<Integer>> factory =
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SetFactory.<Integer>builder(2, 2)
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.addProvider(incrementingIntegerProvider(0))
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.addProvider(incrementingIntegerProvider(10))
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.addCollectionProvider(incrementingIntegerSetProvider(20))
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.addCollectionProvider(incrementingIntegerSetProvider(30))
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.build();
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assertThat(factory.get()).containsExactly(0, 10, 20, 21, 30, 31);
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assertThat(factory.get()).containsExactly(1, 11, 22, 23, 32, 33);
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assertThat(factory.get()).containsExactly(2, 12, 24, 25, 34, 35);
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}
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private static Provider<Integer> incrementingIntegerProvider(int seed) {
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final AtomicInteger value = new AtomicInteger(seed);
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return value::getAndIncrement;
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}
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private static Provider<Set<Integer>> incrementingIntegerSetProvider(int seed) {
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final AtomicInteger value = new AtomicInteger(seed);
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return () -> ImmutableSet.of(value.getAndIncrement(), value.getAndIncrement());
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}
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}
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