1 files changed, 44 insertions, 0 deletions
diff --git a/hamcrest-core/src/main/java/org/hamcrest/core/Every.java b/hamcrest-core/src/main/java/org/hamcrest/core/Every.java
new file mode 100644
index 0000000..757b7b4
--- /dev/null
+++ b/hamcrest-core/src/main/java/org/hamcrest/core/Every.java
@@ -0,0 +1,44 @@
+package org.hamcrest.core;
+
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+import org.hamcrest.TypeSafeDiagnosingMatcher;
+
+public class Every<T> extends TypeSafeDiagnosingMatcher<Iterable<? extends T>> {
+    private final Matcher<? super T> matcher;
+
+    public Every(Matcher<? super T> matcher) {
+        this.matcher= matcher;
+    }
+
+    @Override
+    public boolean matchesSafely(Iterable<? extends T> collection, Description mismatchDescription) {
+        for (T t : collection) {
+            if (!matcher.matches(t)) {
+                mismatchDescription.appendText("an item ");
+                matcher.describeMismatch(t, mismatchDescription);
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText("every item is ").appendDescriptionOf(matcher);
+    }
+
+    /**
+     * Creates a matcher for {@link Iterable}s that only matches when a single pass over the
+     * examined {@link Iterable} yields items that are all matched by the specified
+     * <code>itemMatcher</code>.
+     * For example:
+     * <pre>assertThat(Arrays.asList("bar", "baz"), everyItem(startsWith("ba")))</pre>
+     * 
+     * @param itemMatcher
+     *     the matcher to apply to every item provided by the examined {@link Iterable}
+     */
+    public static <U> Matcher<Iterable<? extends U>> everyItem(final Matcher<U> itemMatcher) {
+        return new Every<U>(itemMatcher);
+    }
+}