src/test/java/org/apache/commons/codec/digest/Blake3Test.java

/*
 * 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.commons.codec.digest;

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

public class Blake3Test {
    @Test
    public void shouldThrowIllegalArgumentExceptionWhenIncorrectKeySize() {
        for (int i = 0; i < 32; i++) {
            assertThrowsProperExceptionWithKeySize(i);
        }
        assertThrowsProperExceptionWithKeySize(33);
    }

    private static void assertThrowsProperExceptionWithKeySize(int keySize) {
        try {
            Blake3.initKeyedHash(new byte[keySize]);
            fail("Should have thrown exception");
        } catch (IllegalArgumentException expected) {
            assertEquals("Blake3 keys must be 32 bytes", expected.getMessage());
        }
    }
}