Tuple0Test.java

/*                        __    __  __  __    __  ___
 *                       \  \  /  /    \  \  /  /  __/
 *                        \  \/  /  /\  \  \/  /  /
 *                         \____/__/  \__\____/__/.ɪᴏ
 * ᶜᵒᵖʸʳᶦᵍʰᵗ ᵇʸ ᵛᵃᵛʳ ⁻ ˡᶦᶜᵉⁿˢᵉᵈ ᵘⁿᵈᵉʳ ᵗʰᵉ ᵃᵖᵃᶜʰᵉ ˡᶦᶜᵉⁿˢᵉ ᵛᵉʳˢᶦᵒⁿ ᵗʷᵒ ᵈᵒᵗ ᶻᵉʳᵒ
 */
package io.vavr;

/*-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-*\
   G E N E R A T O R   C R A F T E D
\*-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-*/

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

import io.vavr.collection.List;
import io.vavr.collection.Seq;
import java.util.Comparator;
import java.util.Objects;
import org.junit.Test;

public class Tuple0Test {

    @Test
    public void shouldCreateTuple() {
        final Tuple0 tuple = createTuple();
        assertThat(tuple).isNotNull();
    }

    @Test
    public void shouldGetArity() {
        final Tuple0 tuple = createTuple();
        assertThat(tuple.arity()).isEqualTo(0);
    }

    @Test
    public void shouldConvertToSeq() {
        final Seq<?> actual = createIntTuple().toSeq();
        assertThat(actual).isEqualTo(List.of());
    }

    @Test
    public void shouldCompareEqual() {
        final Tuple0 t0 = createIntTuple();
        assertThat(t0.compareTo(t0)).isZero();
        assertThat(intTupleComparator.compare(t0, t0)).isZero();
    }

    @Test
    public void shouldApplyTuple() {
        final Tuple0 tuple = createTuple();
        final Tuple0 actual = tuple.apply(() -> Tuple0.instance());
        assertThat(actual).isEqualTo(Tuple0.instance());
    }

    @Test
    public void shouldRecognizeEquality() {
        final Tuple0 tuple1 = createTuple();
        final Tuple0 tuple2 = createTuple();
        assertThat((Object) tuple1).isEqualTo(tuple2);
    }

    @Test
    public void shouldRecognizeNonEquality() {
        final Tuple0 tuple = createTuple();
        final Object other = new Object();
        assertThat(tuple).isNotEqualTo(other);
    }

    @Test
    public void shouldComputeCorrectHashCode() {
        final int actual = createTuple().hashCode();
        final int expected = Objects.hash();
        assertThat(actual).isEqualTo(expected);
    }

    @Test
    public void shouldImplementToString() {
        final String actual = createTuple().toString();
        final String expected = "()";
        assertThat(actual).isEqualTo(expected);
    }

    private Comparator<Tuple0> intTupleComparator = Tuple0.comparator();

    private Tuple0 createTuple() {
        return Tuple0.instance();
    }

    private Tuple0 createIntTuple() {
        return Tuple0.instance();
    }
}