/*
* 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 org.jdbi.v3.core.internal;
import static org.assertj.core.api.Assertions.assertThat;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Set;
import org.junit.Test;
public class ReflectionArrayIteratorTest {
@Test
public void testIntArray() {
final Iterator<Object> it = IterableLike.of(new int[]{1, 2, 3});
assertThat(it).containsExactly(1, 2, 3);
}
@Test
public void testEmptyArray() {
final Iterator<Object> it = IterableLike.of(new int[]{});
assertThat(it).isEmpty();
}
@Test(expected = NoSuchElementException.class)
public void testOverflow() {
final Iterator<?> it = IterableLike.of(new int[]{1});
assertThat(it.hasNext()).isTrue();
assertThat(it.next()).isEqualTo(1);
it.next();
}
@Test(expected = NoSuchElementException.class)
public void testOverflowOnEmpty() {
final Iterator<?> it = IterableLike.of(new int[]{});
it.next();
}
@Test(expected = IllegalArgumentException.class)
public void testObjectToIterator()
{
IterableLike.of(new Object());
}
@Test(expected = IllegalArgumentException.class)
public void testOtherClassToIterator()
{
IterableLike.of("bla"); // or any other kind of object that isn't a java.lang.Object
}
@Test(expected = IllegalArgumentException.class)
public void testPrimitiveToIterator()
{
IterableLike.of(1);
}
@Test(expected = IllegalArgumentException.class)
public void testNullToIterator()
{
IterableLike.of(null);
}
@Test
public void testEmptyArrayToIterator()
{
final Object[] out = toArray(IterableLike.of(new int[]{}));
assertThat(out).isEmpty();
}
@Test
public void testEmptyListToIterator()
{
final Object[] out = toArray(IterableLike.of(new ArrayList<Integer>()));
assertThat(out).isEmpty();
}
@Test
public void testListToIterator()
{
final List<String> in = new ArrayList<String>(2);
in.add("1");
in.add("2");
final Object[] out = toArray(IterableLike.of(in));
assertThat(out).containsExactly("1", "2");
}
@Test
public void testSetToIterator()
{
final Set<String> in = new HashSet<String>(2);
in.add("1");
in.add("2");
final Object[] out = toArray(IterableLike.of(in));
assertThat(out).containsExactly("1", "2");
}
@Test
public void testIterableToIterator()
{
final Iterable<String> in = new Iterable<String>()
{
@Override
public Iterator<String> iterator()
{
final List<String> tmp = new ArrayList<String>();
tmp.add("1");
tmp.add("2");
return tmp.iterator();
}
};
final Object[] out = toArray(IterableLike.of(in));
assertThat(out).containsExactly("1", "2");
}
@Test
public void testStringArrayToIterator()
{
final String[] in = new String[]{"1", "2"};
final Object[] out = toArray(IterableLike.of(in));
assertThat(out).containsExactly("1", "2");
}
@Test
public void testPrimitiveArrayToIterator()
{
final int[] in = new int[]{1, 2};
final Object[] out = toArray(IterableLike.of(in));
assertThat(out).containsExactly(1, 2);
}
private static Object[] toArray(final Iterator<?> iterator)
{
final List<Object> out = new ArrayList<Object>();
while (iterator.hasNext())
{
out.add(iterator.next());
}
return out.toArray();
}
@Test
public void testIsEmptyPrimitiveArray()
{
assertThat(IterableLike.isEmpty(new int[]{1, 2, 3})).isFalse();
}
@Test
public void testIsEmptyEmptyPrimitiveArray()
{
assertThat(IterableLike.isEmpty(new int[]{})).isTrue();
}
@Test
public void testIsEmptyObjectArray()
{
assertThat(IterableLike.isEmpty(new Object[]{"1", "2", "3"})).isFalse();
}
@Test
public void testIsEmptyEmptyObjectArray()
{
assertThat(IterableLike.isEmpty(new Object[]{})).isTrue();
}
@Test
public void testIsEmptyList()
{
final List<String> in = new ArrayList<String>();
in.add("1");
in.add("2");
in.add("3");
assertThat(IterableLike.isEmpty(in)).isFalse();
}
@Test
public void testIsEmptyEmptyList()
{
assertThat(IterableLike.isEmpty(new ArrayList<String>())).isTrue();
}
@Test(expected = IllegalArgumentException.class)
public void testIsEmptyObject()
{
IterableLike.isEmpty(new Object());
}
@Test(expected = IllegalArgumentException.class)
public void testIsEmptyPrimitive()
{
IterableLike.isEmpty(5);
}
@Test(expected = IllegalArgumentException.class)
public void testIsEmptyNull()
{
IterableLike.isEmpty(null);
}
}