/*
* 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.catalina.realm;

import java.security.Principal;

import org.junit.Assert;
import org.junit.Test;

public class TestMemoryRealm {

    /**
     * Unknown user triggers NPE.
     */
    @Test
    public void testBug56246() {
        MemoryRealm memoryRealm = new MemoryRealm();

        Principal p = memoryRealm.authenticate("foo", "bar");

        Assert.assertNull(p);
    }
}

/*
* 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.catalina.realm;

import java.security.Principal;

import org.junit.Assert;
import org.junit.Test;

public class TestMemoryRealm {

    /**
     * Unknown user triggers NPE.
     */
    @Test
    public void testBug56246() {
        MemoryRealm memoryRealm = new MemoryRealm();
        memoryRealm.setCredentialHandler(new MessageDigestCredentialHandler());

        Principal p = memoryRealm.authenticate("foo", "bar");

        Assert.assertNull(p);
    }
}

Fix test, a plain realm now needs a credentials handler since it's only set in startInternal.