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A modern testing and behavioural specification framework for Java 8

There is a newer version: 0.4

package com.insightfullogic.lambdabehave.specifications;

import com.insightfullogic.lambdabehave.expectations.Expect;

/**
 * Implement this interface to specify a behaviour that requires
 * two data values.
 */
@FunctionalInterface
public interface TwoColumnDataSpecification {

    /**
     * Callback method which specifies the actual behaviour.
     *
     * @param expect the callback object used to describe expectations
     * @param first the first parameter value
     * @param second the second parameter value
     */
    public void specifyBehaviour(Expect expect, F first, S second) throws Exception;

}