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/*
* Copyright (C) 2009 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;
import com.google.common.annotations.GwtCompatible;
import java.util.Collections;
import java.util.Iterator;
import java.util.NoSuchElementException;
import junit.framework.TestCase;
/**
* Unit test for {@link MinimalIterable}.
*
* @author Kevin Bourrillion
*/
@GwtCompatible
public class MinimalIterableTest extends TestCase {
public void testOf_empty() {
Iterable<String> iterable = MinimalIterable.<String>of();
Iterator<String> iterator = iterable.iterator();
assertFalse(iterator.hasNext());
try {
iterator.next();
fail();
} catch (NoSuchElementException expected) {
}
try {
iterable.iterator();
fail();
} catch (IllegalStateException expected) {
}
}
public void testOf_one() {
Iterable<String> iterable = MinimalIterable.of("a");
Iterator<String> iterator = iterable.iterator();
assertTrue(iterator.hasNext());
assertEquals("a", iterator.next());
assertFalse(iterator.hasNext());
try {
iterator.next();
fail();
} catch (NoSuchElementException expected) {
}
try {
iterable.iterator();
fail();
} catch (IllegalStateException expected) {
}
}
public void testFrom_empty() {
Iterable<String> iterable = MinimalIterable.from(Collections.<String>emptySet());
Iterator<String> iterator = iterable.iterator();
assertFalse(iterator.hasNext());
try {
iterator.next();
fail();
} catch (NoSuchElementException expected) {
}
try {
iterable.iterator();
fail();
} catch (IllegalStateException expected) {
}
}
public void testFrom_one() {
Iterable<String> iterable = MinimalIterable.from(Collections.singleton("a"));
Iterator<String> iterator = iterable.iterator();
assertTrue(iterator.hasNext());
assertEquals("a", iterator.next());
try {
iterator.remove();
fail();
} catch (UnsupportedOperationException expected) {
}
assertFalse(iterator.hasNext());
try {
iterator.next();
fail();
} catch (NoSuchElementException expected) {
}
try {
iterable.iterator();
fail();
} catch (IllegalStateException expected) {
}
}
}
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