ZombieMatcher.java

package com.tom;

import com.tom.zombie.Zombie;
import org.hamcrest.Matcher;

public class ZombieMatcher {

    public static Matcher<Zombie> is(Zombie.Type type) {
        return new FuncTypeSafeMatcher<Zombie>(z -> z.getType() == type,
                                              (d) -> d.appendText("Zombie should be " + type),
                                              (z, d) -> d.appendText("was " + z.getType()));
    }

    public static Matcher<Zombie> isKilled() {
        return new FuncTypeSafeMatcher<Zombie>(z -> !z.isAlive(),
                                              (d) -> d.appendText("Zombie should be killed"),
                                              (z, d) -> d.appendText("was alive"));
    }

    public static Matcher<Zombie> isAlive() {
        return new FuncTypeSafeMatcher<Zombie>(Zombie::isAlive,
                                               (d) -> d.appendText("Zombie should be alive"),
                                               (z, d) -> d.appendText("was killed"));
    }

}