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Java example source code file (MultimapPutIterableTester.java)
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The MultimapPutIterableTester.java Java example source code
/*
* Copyright (C) 2012 The Guava 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 com.google.common.collect.testing.google;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.collect.testing.Helpers.assertContainsAllOf;
import static com.google.common.collect.testing.features.CollectionSize.ZERO;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
/**
* Tests for {@link Multimap#putAll(Object, Iterable)}.
*
* @author Louis Wasserman
*/
@GwtCompatible
public class MultimapPutIterableTester<K, V> extends AbstractMultimapTester> {
@CollectionSize.Require(absent = ZERO)
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllNonEmptyIterableOnPresentKey() {
assertTrue(
multimap()
.putAll(
k0(),
new Iterable<V>() {
@Override
public Iterator<V> iterator() {
return Lists.newArrayList(v3(), v4()).iterator();
}
}));
assertGet(k0(), v0(), v3(), v4());
}
@CollectionSize.Require(absent = ZERO)
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllNonEmptyCollectionOnPresentKey() {
assertTrue(multimap().putAll(k0(), Lists.newArrayList(v3(), v4())));
assertGet(k0(), v0(), v3(), v4());
}
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllNonEmptyIterableOnAbsentKey() {
assertTrue(
multimap()
.putAll(
k3(),
new Iterable<V>() {
@Override
public Iterator<V> iterator() {
return Lists.newArrayList(v3(), v4()).iterator();
}
}));
assertGet(k3(), v3(), v4());
}
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllNonEmptyCollectionOnAbsentKey() {
assertTrue(multimap().putAll(k3(), Lists.newArrayList(v3(), v4())));
assertGet(k3(), v3(), v4());
}
@CollectionSize.Require(absent = ZERO)
@MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
public void testPutAllNullValueOnPresentKey_supported() {
assertTrue(multimap().putAll(k0(), Lists.newArrayList(v3(), null)));
assertGet(k0(), v0(), v3(), null);
}
@MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
public void testPutAllNullValueOnAbsentKey_supported() {
assertTrue(multimap().putAll(k3(), Lists.newArrayList(v3(), null)));
assertGet(k3(), v3(), null);
}
@MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
public void testPutAllNullValueSingle_unsupported() {
multimap().putAll(k1(), Lists.newArrayList((V) null));
expectUnchanged();
}
// In principle, it would be nice to apply these two tests to keys with existing values, too.
@MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
public void testPutAllNullValueNullLast_unsupported() {
int size = getNumElements();
try {
multimap().putAll(k3(), Lists.newArrayList(v3(), null));
fail();
} catch (NullPointerException expected) {
}
Collection<V> values = multimap().get(k3());
if (values.size() == 0) {
expectUnchanged();
// Be extra thorough in case internal state was corrupted by the expected null.
assertEquals(Lists.newArrayList(), Lists.newArrayList(values));
assertEquals(size, multimap().size());
} else {
assertEquals(Lists.newArrayList(v3()), Lists.newArrayList(values));
assertEquals(size + 1, multimap().size());
}
}
@MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
public void testPutAllNullValueNullFirst_unsupported() {
int size = getNumElements();
try {
multimap().putAll(k3(), Lists.newArrayList(null, v3()));
fail();
} catch (NullPointerException expected) {
}
/*
* In principle, a Multimap implementation could add e3 first before failing on the null. But
* that seems unlikely enough to be worth complicating the test over, especially if there's any
* chance that a permissive test could mask a bug.
*/
expectUnchanged();
// Be extra thorough in case internal state was corrupted by the expected null.
assertEquals(Lists.newArrayList(), Lists.newArrayList(multimap().get(k3())));
assertEquals(size, multimap().size());
}
@MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
public void testPutAllOnPresentNullKey() {
assertTrue(multimap().putAll(null, Lists.newArrayList(v3(), v4())));
assertGet(null, v3(), v4());
}
@MapFeature.Require(absent = ALLOWS_NULL_KEYS)
public void testPutAllNullForbidden() {
try {
multimap().putAll(null, Collections.singletonList(v3()));
fail("Expected NullPointerException");
} catch (NullPointerException expected) {
// success
}
}
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllEmptyCollectionOnAbsentKey() {
assertFalse(multimap().putAll(k3(), Collections.<V>emptyList()));
expectUnchanged();
}
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllEmptyIterableOnAbsentKey() {
Iterable<V> iterable =
new Iterable<V>() {
@Override
public Iterator<V> iterator() {
return ImmutableSet.<V>of().iterator();
}
};
assertFalse(multimap().putAll(k3(), iterable));
expectUnchanged();
}
@CollectionSize.Require(absent = ZERO)
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllEmptyIterableOnPresentKey() {
multimap().putAll(k0(), Collections.<V>emptyList());
expectUnchanged();
}
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllOnlyCallsIteratorOnce() {
Iterable<V> iterable =
new Iterable<V>() {
private boolean calledIteratorAlready = false;
@Override
public Iterator<V> iterator() {
checkState(!calledIteratorAlready);
calledIteratorAlready = true;
return Iterators.forArray(v3());
}
};
multimap().putAll(k3(), iterable);
}
@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllPropagatesToGet() {
Collection<V> getCollection = multimap().get(k0());
int getCollectionSize = getCollection.size();
assertTrue(multimap().putAll(k0(), Lists.newArrayList(v3(), v4())));
assertEquals(getCollectionSize + 2, getCollection.size());
assertContainsAllOf(getCollection, v3(), v4());
}
}
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