* specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.plugin.descriptor;

/**
 * DuplicateParameterException
 */
public class DuplicateParameterException extends InvalidPluginDescriptorException {

    public DuplicateParameterException(String message) {
        super(message);
    }

     * @param parameter add a new parameter
     * @throws DuplicateParameterException if any
     */
    public void addParameter(Parameter parameter) throws DuplicateParameterException {
        if (parameters.contains(parameter)) {
            throw new DuplicateParameterException(parameter.getName()
                    + " has been declared multiple times in mojo with goal: " + getGoal() + " (implementation: "

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

class MojoDescriptorTest {
    @Test
    void getParameterMap() throws DuplicateParameterException {
        MojoDescriptor mojoDescriptor = new MojoDescriptor();
        Parameter param1 = new Parameter();
        param1.setName("param1");
        param1.setDefaultValue("value1");