String horse = "horse";
String cow = "cow";
Ensure.that(horse, m.or(m.eq(horse), m.eq(cow)));
Ensure.that(cow, m.either(m.eq(horse), m.eq(cow)));
Ensure.that(horse, m.and(m.eq(horse), m.contains("ors")));
Ensure.that(cow, m.both(m.eq(cow), m.endsWith("ow")));
}
}