@Test
public void printsCoords() {

    final Vect<Double> vect = new RotateVect<>(
        new FixedVector<>(new Scalars<>(2)), Math.random()
    );
    for (final Scalar<Double> scalar : vect.coords()) {
        MatcherAssert.assertThat(
            vect.toString(), Matchers.containsString(scalar.toString())
        );
    }
}