/*
* 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.deltaspike.core.util;
import org.junit.Assert;
import org.junit.Assume;
import org.junit.Before;
import org.junit.Test;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
public class StreamUtilTest
{
@Before
public void isEnabled()
{
Assume.assumeTrue(StreamUtil.isStreamSupported());
}
@Test
public void shouldIdentifyStreamReturnType() throws Exception
{
Method empty = ArrayList.class.getMethod("stream");
Assert.assertTrue(StreamUtil.isStreamReturned(empty));
}
@Test
public void shouldReturnEmptyWhenGivenNull() throws Exception
{
Object wrapped = StreamUtil.wrap(null);
Assert.assertNull(wrapped);
}
@Test
public void shouldReturnAStreamWhenGivenACollection() throws Exception
{
Object wrapped = StreamUtil.wrap(Arrays.asList("a","b"));
Class<?> streamClass = Class.forName("java.util.stream.Stream");
Assert.assertTrue(streamClass.isAssignableFrom(wrapped.getClass()));
}
}