/*
* 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;
public class OptionalUtilTest
{
@Before
public void isEnabled()
{
Assume.assumeTrue(OptionalUtil.isOptionalSupported());
}
@Test
public void shouldIdentifyOptionalReturnType() throws Exception
{
Method empty = getOptionalClass().getMethod("empty");
Assert.assertTrue(OptionalUtil.isOptionalReturned(empty));
}
@Test
public void shouldReturnEmptyWhenGivenNull() throws Exception
{
Object wrapped = OptionalUtil.wrap(null);
Method isPresent = getOptionalClass().getMethod("isPresent");
Object invoke = isPresent.invoke(wrapped);
Assert.assertEquals(invoke, Boolean.FALSE);
}
@Test
public void shouldReturnNotEmptyWhenGivenNonnull() throws Exception
{
Object wrapped = OptionalUtil.wrap("String");
Method isPresent = getOptionalClass().getMethod("isPresent");
Object invoke = isPresent.invoke(wrapped);
Assert.assertEquals(invoke, Boolean.TRUE);
}
private static Class<?> getOptionalClass() throws ClassNotFoundException {
return Class.forName("java.util.Optional");
}
}