sistema-caja/test/danielcortes/xyz/utils/NaturalOrderComparatorTest.java

package danielcortes.xyz.utils;

import static org.assertj.core.api.Assertions.assertThat;

import java.util.ArrayList;
import java.util.Collections;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInstance;

@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class NaturalOrderComparatorTest {
    private ArrayList<String> original;
    private ArrayList<String> toCompare;
    private ArrayList<String> lexicographic;
    private ArrayList<String> natural;

    @BeforeAll
    void setUp(){
        original = new ArrayList<>();
        original.add("1");
        original.add("10");
        original.add("100");
        original.add("3");
        original.add("101");
        original.add("10000");
        original.add("100000");

        toCompare = new ArrayList<>(original);

        lexicographic = new ArrayList<>();
        lexicographic.add("1");
        lexicographic.add("10");
        lexicographic.add("100");
        lexicographic.add("101");
        lexicographic.add("10000");
        lexicographic.add("100000");
        lexicographic.add("3");

        natural = new ArrayList<>();
        natural.add("1");
        natural.add("3");
        natural.add("10");
        natural.add("100");
        natural.add("101");
        natural.add("10000");
        natural.add("100000");

        Collections.shuffle(toCompare);
    }

    @Test
    void testIfArraySortIsCorrect(){
        NaturalOrderComparator comparator = new NaturalOrderComparator();
        toCompare.sort(comparator);

        assertThat(toCompare)
            .containsSequence(natural)
            .doesNotContainSequence(lexicographic)
            .doesNotContainSequence(original);

    }
}