EveryItem hamcrest matcher usage

EveryItemTest.java

import static org.hamcrest.core.Every.everyItem;
import static org.hamcrest.core.Is.is;
import static org.hamcrest.core.IsNot.not;
import static org.junit.Assert.assertThat;

import java.util.Arrays;
import java.util.Collection;

import org.junit.Test;

public class EveryItemTest
{
    @Test
    public void every_item_in_list_is() {
        Collection<String> array = Arrays.asList("a", "a", "a");
        assertThat(array, everyItem(is("a")));
    }

    @Test
    public void not_every_item_in_list_is() {
        Collection<String> array = Arrays.asList("a", "b", "a");
        assertThat(array, not(everyItem(is("a"))));
    }
}