From da35bca152768b638cfe356a1881f9f707c03842 Mon Sep 17 00:00:00 2001
From: John Kozlov <orionllmain@gmail.com>
Date: Sun, 22 Sep 2013 15:40:31 +0700
Subject: [PATCH] sameElements

---
 .../com/github/xtension/IterableExtensions.xtend    |  7 +++++++
 .../com/github/xtension/IteratorExtensions.xtend    | 13 +++++++++++++
 .../github/xtension/TestIterableExtensions.xtend    |  9 +++++++++
 3 files changed, 29 insertions(+)

diff --git a/src/main/java/com/github/xtension/IterableExtensions.xtend b/src/main/java/com/github/xtension/IterableExtensions.xtend
index 21b66e9..a526795 100644
--- a/src/main/java/com/github/xtension/IterableExtensions.xtend
+++ b/src/main/java/com/github/xtension/IterableExtensions.xtend
@@ -569,6 +569,13 @@ final class IterableExtensions {
 		}
 	}
 
+	/**
+	 * Checks if the other iterable contains the same elements in the same order as this iterable.
+	 */
+	def static <T> boolean sameElements(Iterable<T> iterable, Iterable<T> other) {
+		iterable.iterator.sameElements(other.iterator)
+	}
+
 	/**
 	 * Sums up the elements of this iterable.
 	 */
diff --git a/src/main/java/com/github/xtension/IteratorExtensions.xtend b/src/main/java/com/github/xtension/IteratorExtensions.xtend
index 81b1531..4c779db 100644
--- a/src/main/java/com/github/xtension/IteratorExtensions.xtend
+++ b/src/main/java/com/github/xtension/IteratorExtensions.xtend
@@ -568,6 +568,19 @@ final class IteratorExtensions {
 		}
 	}
 
+	/**
+	 * Checks if the other iterator contains the same elements in the same order as this iterator.
+	 */
+	def static <T> boolean sameElements(Iterator<T> iterator, Iterator<T> other) {
+		while (iterator.hasNext && other.hasNext) {
+			if (iterator.next != other.next) {
+				return false
+			}
+		}
+
+		!iterator.hasNext && !other.hasNext
+	}
+
 	/**
 	 * Sums up the elements of this iterator.
 	 */
diff --git a/src/test/java/com/github/xtension/TestIterableExtensions.xtend b/src/test/java/com/github/xtension/TestIterableExtensions.xtend
index 75903fe..a2c4aec 100644
--- a/src/test/java/com/github/xtension/TestIterableExtensions.xtend
+++ b/src/test/java/com/github/xtension/TestIterableExtensions.xtend
@@ -192,6 +192,15 @@ class TestIterableExtensions {
 		org.assertj.guava.api.Assertions::assertThat(new ArrayList<Integer>().maxByOptional[-it]).isAbsent
 	}
 
+	@Test
+	def void sameElements() {
+		assertThat(#[].sameElements(#[])).isTrue
+		assertThat(#[1,2,3].sameElements(#[1,2,3])).isTrue
+		assertThat(#[1,2,3].sameElements(#[1,3,2])).isFalse
+		assertThat(#[1,2,3].sameElements(#[1,2,3,4])).isFalse
+		assertThat(#[1,2,3,4].sameElements(#[1,2,3])).isFalse
+	}
+
 	@Test
 	def void sumInt() {
 		assertThat(#[1,2,3].sumInt).isEqualTo(6)