1 package org.hamcrest.core; 2 3 import org.hamcrest.Description; 4 import org.hamcrest.Matcher; 5 import org.hamcrest.TypeSafeDiagnosingMatcher; 6 7 public class Every<T> extends TypeSafeDiagnosingMatcher<Iterable<? extends T>> { 8 private final Matcher<? super T> matcher; 9 10 public Every(Matcher<? super T> matcher) { 11 this.matcher= matcher; 12 } 13 14 @Override 15 public boolean matchesSafely(Iterable<? extends T> collection, Description mismatchDescription) { 16 for (T t : collection) { 17 if (!matcher.matches(t)) { 18 mismatchDescription.appendText("an item "); 19 matcher.describeMismatch(t, mismatchDescription); 20 return false; 21 } 22 } 23 return true; 24 } 25 26 @Override 27 public void describeTo(Description description) { 28 description.appendText("every item is ").appendDescriptionOf(matcher); 29 } 30 31 /** 32 * Creates a matcher for {@link Iterable}s that only matches when a single pass over the 33 * examined {@link Iterable} yields items that are all matched by the specified 34 * <code>itemMatcher</code>. 35 * For example: 36 * <pre>assertThat(Arrays.asList("bar", "baz"), everyItem(startsWith("ba")))</pre> 37 * 38 * @param itemMatcher 39 * the matcher to apply to every item provided by the examined {@link Iterable} 40 */ 41 public static <U> Matcher<Iterable<? extends U>> everyItem(final Matcher<U> itemMatcher) { 42 return new Every<U>(itemMatcher); 43 } 44 } 45
