src/test/java/org/apache/bcel/generic/BranchHandleTest.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
 *
 *   https://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.bcel.generic;

import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertThrows;

import org.junit.jupiter.api.Test;

class BranchHandleTest {

    @Test
    void testGetBHnull() {
        assertThrows(ClassGenException.class, () -> BranchHandle.getBranchHandle(null));
    }

    @Test
    void testsetInstructionBI() {
        final BranchHandle bh = BranchHandle.getBranchHandle(new GOTO(null)); // have to start with a valid BI
        assertNotNull(bh);
        bh.setInstruction(new GOTO(null));
        assertNotNull(bh);
    }

    @Test
    void testsetInstructionnotBI() {
        final BranchHandle bh = BranchHandle.getBranchHandle(new GOTO(null)); // have to start with a valid BI
        assertNotNull(bh);
        assertThrows(ClassGenException.class, () -> bh.setInstruction(new NOP()));
    }

    // Test that setInstruction only allows BranchInstructions
    @Test
    void testsetInstructionNull() {
        final BranchHandle bh = BranchHandle.getBranchHandle(new GOTO(null)); // have to start with a valid BI
        assertNotNull(bh);
        assertThrows(ClassGenException.class, () -> bh.setInstruction(null));
    }
}