Added SingletonCursor.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/test/java/com/amazon/carbonado/cursor/TestCursors.java b/src/test/java/com/amazon/carbonado/cursor/TestCursors.java
index f063a59..fa5d8a7 100644
--- a/src/test/java/com/amazon/carbonado/cursor/TestCursors.java
+++ b/src/test/java/com/amazon/carbonado/cursor/TestCursors.java
@@ -20,6 +20,8 @@ package com.amazon.carbonado.cursor;
 

 import java.util.Arrays;

 import java.util.Comparator;

+import java.util.List;

+import java.util.NoSuchElementException;

 

 import junit.framework.TestCase;

 import junit.framework.TestSuite;

@@ -53,6 +55,43 @@ public class TestCursors extends TestCase {
     protected void tearDown() {

     }

 

+    public void testSingleton() throws Exception {

+        try {

+            new SingletonCursor<Object>(null);

+            fail();

+        } catch (IllegalArgumentException e) {

+        }

+

+        Cursor<String> cursor = new SingletonCursor<String>("hello");

+

+        assertTrue(cursor.hasNext());

+        assertEquals("hello", cursor.next());

+        assertFalse(cursor.hasNext());

+        try {

+            cursor.next();

+            fail();

+        } catch (NoSuchElementException e) {

+        }

+

+        assertEquals(0, cursor.skipNext(1));

+

+        cursor = new SingletonCursor<String>("world");

+        List<String> list = cursor.toList(0);

+        assertEquals(0, list.size());

+        list = cursor.toList(10);

+        assertEquals(1, list.size());

+        assertEquals("world", list.get(0));

+

+        cursor = new SingletonCursor<String>("world");

+        cursor.close();

+        assertFalse(cursor.hasNext());

+

+        cursor = new SingletonCursor<String>("world");

+        assertEquals(1, cursor.skipNext(2));

+        assertEquals(0, cursor.skipNext(1));

+        assertFalse(cursor.hasNext());

+    }

+

     public void testUnion() throws Exception {

         Cursor<Element> left, right, union;