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