/*
* 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.tomcat.util.buf;
import java.util.Collection;
import org.junit.Assert;
import org.junit.Test;
/*
* None of these tests should throw a NPE.
*/
public class TestStringUtils {
@Test
public void testNullArray() {
Assert.assertEquals("", StringUtils.join((String[]) null));
}
@Test
public void testNullArrayCharStringBuilder() {
StringBuilder sb = new StringBuilder();
StringUtils.join((String[]) null, ',', sb);
Assert.assertEquals("", sb.toString());
}
@Test
public void testNullCollection() {
Assert.assertEquals("", StringUtils.join((Collection<String>) null));
}
@Test
public void testNullCollectionChar() {
Assert.assertEquals("", StringUtils.join(null, ','));
}
@Test
public void testNullIterableCharStringBuilder() {
StringBuilder sb = new StringBuilder();
StringUtils.join((Iterable<String>) null, ',', sb);
Assert.assertEquals("", sb.toString());
}
@Test
public void testNullArrayCharFunctionStringBuilder() {
StringBuilder sb = new StringBuilder();
StringUtils.join((String[]) null, ',', null, sb);
Assert.assertEquals("", sb.toString());
}
@Test
public void testNullIterableCharFunctionStringBuilder() {
StringBuilder sb = new StringBuilder();
StringUtils.join((Iterable<String>) null, ',', null, sb);
Assert.assertEquals("", sb.toString());
}
}