/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.harmony.tests.java.util;
import java.util.AbstractCollection;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import junit.framework.TestCase;
public class AbstractCollectionTest extends TestCase {
/**
* java.util.AbstractCollection#add(java.lang.Object)
*/
public void test_addLjava_lang_Object() {
AbstractCollection<Object> ac = new AbstractCollection<Object>() {
@Override
public Iterator<Object> iterator() {
fail("iterator should not get called");
return null;
}
@Override
public int size() {
fail("size should not get called");
return 0;
}
};
try {
ac.add(null);
} catch (UnsupportedOperationException e) {
}
}
/**
* java.util.AbstractCollection#addAll(java.util.Collection)
*/
public void test_addAllLjava_util_Collection() {
final Collection<String> fixtures = Arrays.asList("0", "1", "2");
AbstractCollection<String> ac = new AbstractCollection<String>() {
@Override
public boolean add(String object) {
assertTrue(fixtures.contains(object));
return true;
}
@Override
public Iterator<String> iterator() {
fail("iterator should not get called");
return null;
}
@Override
public int size() {
fail("size should not get called");
return 0;
}
};
assertTrue(ac.addAll(fixtures));
}
/**
* java.util.AbstractCollection#containsAll(java.util.Collection)
*/
public void test_containsAllLjava_util_Collection() {
final Collection<String> fixtures = Arrays.asList("0", "1", "2");
AbstractCollection<String> ac = new AbstractCollection<String>() {
@Override
public boolean contains(Object object) {
assertTrue(fixtures.contains(object));
return true;
}
@Override
public Iterator<String> iterator() {
fail("iterator should not get called");
return null;
}
@Override
public int size() {
fail("size should not get called");
return 0;
}
};
assertTrue(ac.containsAll(fixtures));
}
/**
* java.util.AbstractCollection#isEmpty()
*/
public void test_isEmpty() {
final boolean[] sizeCalled = new boolean[1];
AbstractCollection<Object> ac = new AbstractCollection<Object>() {
@Override
public Iterator<Object> iterator() {
fail("iterator should not get called");
return null;
}
@Override
public int size() {
sizeCalled[0] = true;
return 0;
}
};
assertTrue(ac.isEmpty());
assertTrue(sizeCalled[0]);
}
/**
* java.util.AbstractCollection#removeAll(java.util.Collection)
*/
public void test_removeAllLjava_util_Collection() {
final String[] removed = new String[3];
AbstractCollection<String> ac = new AbstractCollection<String>() {
@Override
public Iterator<String> iterator() {
return new Iterator<String>() {
String[] values = new String[] { "0", "1", "2" };
int index;
public boolean hasNext() {
return index < values.length;
}
public String next() {
return values[index++];
}
public void remove() {
removed[index - 1] = values[index - 1];
}
};
}
@Override
public int size() {
fail("size should not get called");
return 0;
}
};
assertTrue(ac.removeAll(Arrays.asList("0", "1", "2")));
for (String r : removed) {
if (!"0".equals(r) && !"1".equals(r) && !"2".equals(r)) {
fail("an unexpected element was removed");
}
}
}
/**
* java.util.AbstractCollection#retainAll(java.util.Collection)
*/
public void test_retainAllLjava_util_Collection() {
final String[] removed = new String[1];
AbstractCollection<String> ac = new AbstractCollection<String>() {
@Override
public Iterator<String> iterator() {
return new Iterator<String>() {
String[] values = new String[] { "0", "1", "2" };
int index;
public boolean hasNext() {
return index < values.length;
}
public String next() {
return values[index++];
}
public void remove() {
removed[index - 1] = values[index - 1];
}
};
}
@Override
public int size() {
fail("size should not get called");
return 0;
}
};
assertTrue(ac.retainAll(Arrays.asList("1", "2")));
assertEquals("0", removed[0]);
}
/**
* java.util.AbstractCollection#toArray()
*/
public void test_toArray() {
AbstractCollection<String> ac = new AbstractCollection<String>() {
@Override
public Iterator<String> iterator() {
return new Iterator<String>() {
String[] values = new String[] { "0", "1", "2" };
int index;
public boolean hasNext() {
return index < values.length;
}
public String next() {
return values[index++];
}
public void remove() {
fail("remove should not get called");
}
};
}
@Override
public int size() {
return 3;
}
};
Object[] array = ac.toArray();
assertEquals(3, array.length);
for (Object o : array) {
if (!"0".equals(o) && !"1".equals(o) && !"2".equals(o)) {
fail("an unexpected element was removed");
}
}
}
/**
* java.util.AbstractCollection#toArray(java.lang.Object[])
*/
public void test_toArray$Ljava_lang_Object() {
AbstractCollection<String> ac = new AbstractCollection<String>() {
@Override
public Iterator<String> iterator() {
return new Iterator<String>() {
String[] values = new String[] { "0", "1", "2" };
int index;
public boolean hasNext() {
return index < values.length;
}
public String next() {
return values[index++];
}
public void remove() {
fail("remove should not get called");
}
};
}
@Override
public int size() {
return 3;
}
};
try {
ac.toArray(null);
fail("No expected NullPointerException");
} catch (NullPointerException e) {
// expected
}
try {
ac.toArray(new StringBuffer[ac.size()]);
fail("No expected ArrayStoreException");
} catch (ArrayStoreException e) {
// expected
}
String[] a = new String[3];
assertSame(a, ac.toArray(a));
a = new String[0];
assertNotSame(a, ac.toArray(a));
a = ac.toArray(a);
assertEquals(3, a.length);
CharSequence[] csa = new CharSequence[3];
ac.toArray(csa);
assertEquals(3, csa.length);
assertEquals("0", csa[0]);
assertEquals("1", csa[1]);
assertEquals("2", csa[2]);
}
/**
* java.util.AbstractCollection#toString()
*/
public void test_toString() {
// see HARMONY-1522
// collection that returns null iterator(this is against the spec.)
AbstractCollection<?> c = new AbstractCollection<Object>() {
@Override
public int size() {
// return non-zero value to pass 'isEmpty' check
return 1;
}
@Override
public Iterator<Object> iterator() {
// this violates the spec.
return null;
}
};
try {
// AbstractCollection.toString() doesn't verify
// whether iterator() returns null value or not
c.toString();
fail("No expected NullPointerException");
} catch (NullPointerException e) {
}
}
}