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More changes for singly-traversable 'contains' assertions (closes #1941)
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46 changes: 46 additions & 0 deletions
46
src/test/java/org/assertj/core/internal/iterables/SinglyIterableFactory.java
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/* | ||
* 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. | ||
* | ||
* Copyright 2012-2020 the original author or authors. | ||
*/ | ||
package org.assertj.core.internal.iterables; | ||
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import java.util.Iterator; | ||
import java.util.List; | ||
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class SinglyIterableFactory { | ||
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static Iterable<String> createSinglyIterable(final List<String> values) { | ||
// can't use Iterable<> for anonymous class in java 8 | ||
return new Iterable<String>() { | ||
private boolean isIteratorCreated = false; | ||
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@Override | ||
public Iterator<String> iterator() { | ||
if (isIteratorCreated) throw new IllegalArgumentException("Cannot create two iterators on a singly-iterable sequence"); | ||
isIteratorCreated = true; | ||
return new Iterator<String>() { | ||
private final Iterator<String> listIterator = values.iterator(); | ||
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@Override | ||
public boolean hasNext() { | ||
return listIterator.hasNext(); | ||
} | ||
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@Override | ||
public String next() { | ||
return listIterator.next(); | ||
} | ||
}; | ||
} | ||
}; | ||
} | ||
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} |