src/org/junit/internal/matchers/Each.java

package org.junit.internal.matchers;

import static org.hamcrest.CoreMatchers.not;
import static org.junit.internal.matchers.IsCollectionContaining.hasItem;
import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.hamcrest.Matcher;

public class Each {
	public static <T> Matcher<Iterable<T>> each(final Matcher<T> individual) {
		final Matcher<Iterable<T>> allItemsAre = not(hasItem(not(individual)));
		
		return new BaseMatcher<Iterable<T>>() {
			public boolean matches(Object item) {
				return allItemsAre.matches(item);
			}
			
			public void describeTo(Description description) {
				description.appendText("each ");
				individual.describeTo(description);
			}
		};
	}
}