@Test
public void errorsWhenNoMetricSpace() {

    this.thrown.expect(UnsupportedOperationException.class);
    final int dim = 6;
    final Vect<Object> first = new FixedVector<>(new Scalars<>(dim));
    final Vect<Object> second = new FixedVector<>(new Scalars<>(dim));
    new Product<>(first, second).value(new SpyField<>(new Object(), new Object()));
}