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JUnit5 extension to run tests with classpath customizations

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package com.github.fridujo.junit.extension.classpath;

import java.util.Iterator;
import java.util.function.BiFunction;
import java.util.stream.Stream;

public class Streams {

    public static  U reduce(Stream stream, U initialValue, BiFunction accumulator) {
        U value = initialValue;
        Iterator iterator = stream.iterator();
        while (iterator.hasNext()) {
            value = accumulator.apply(value, iterator.next());
        }
        return value;
    }
}