QueuedIterators

QueuedIterators are iterators that can have other iterators interleaved
into their iteration sequences. This was implemented as a decent idea,
and because it may help get the iterative topDownTransform working again
(if it ever worked in the first place...)

1 files changed, 79 insertions, 0 deletions

diff --git a/base/src/test/java/bjc/utils/data/QueuedIteratorTest.java b/base/src/test/java/bjc/utils/data/QueuedIteratorTest.java
new file mode 100644
index 0000000..573d218
--- /dev/null
+++ b/base/src/test/java/bjc/utils/data/QueuedIteratorTest.java
@@ -0,0 +1,79 @@
+package bjc.utils.data;
+
+import static org.junit.Assert.*;
+
+import java.util.Iterator;
+
+import static java.util.Arrays.asList;
+
+import org.junit.Test;
+
+import bjc.utils.funcutils.TestUtils;
+
+import static bjc.utils.data.QueuedIterator.*;
+import static bjc.utils.funcutils.TestUtils.*;
+import static bjc.utils.funcutils.IteratorUtils.*;
+
+/**
+ * Test of QueuedIterator.
+ * 
+ * @author bjculkin
+ *
+ */
+public class QueuedIteratorTest {
+
+	/**
+	 * Test of functionality.
+	 */
+	@Test
+	public void test() {
+		assertIteratorEquals(false, queued());
+
+		assertIteratorEquals(false, queued(asList(1, 2, 3)), 1, 2, 3);
+		assertIteratorEquals(false, queued(asList(1, 2, 3), asList(3, 2, 1)), 1, 2, 3, 3, 2, 1);
+
+	}
+
+	/**
+	 * Test of before() method.
+	 */
+	@Test
+	public void testBefore() {
+		QueuedIterator<Integer> itr = queued(asList(1, 2, 3));
+
+		assertIteratorEquals(true, itr, 1, 2);
+
+		itr.before(asList(1, 2, 3));
+
+		assertIteratorEquals(false, itr, 1, 2, 3, 3);
+	}
+
+	/**
+	 * Test of after() method.
+	 */
+	@Test
+	public void testAfter() {
+		QueuedIterator<Integer> itr = queued(asList(1, 2, 3));
+
+		assertIteratorEquals(true, itr, 1, 2);
+
+		itr.after(asList(1, 2, 3));
+
+		assertIteratorEquals(false, itr, 3, 1, 2, 3);
+	}
+	
+	/**
+	 * Test of last() method.
+	 */
+	@Test
+	public void testLast() {
+		QueuedIterator<Integer> itr = queued(asList(1, 2, 3));
+
+		assertIteratorEquals(true, itr, 1, 2);
+
+		itr.after(asList(4));
+		itr.last(asList(1, 2, 3));
+
+		assertIteratorEquals(false, itr, 3, 4, 1, 2, 3);
+	}
+}