Adds unit tests.

Switches from cursor() to iterator() for toString(), hashCode() and equals().

Author: brianburton

src/main/java/org/javimmutable/collections/btree_list/JImmutableBtreeList.java

@@ -44,8 +44,8 @@
 import org.javimmutable.collections.SplitableIterator;
 import org.javimmutable.collections.common.ListAdaptor;
 import org.javimmutable.collections.common.StreamConstants;
-import org.javimmutable.collections.cursors.Cursors;
 import org.javimmutable.collections.indexed.IndexedList;
+import org.javimmutable.collections.iterators.IteratorHelper;
 import org.javimmutable.collections.serialization.JImmutableRandomAccessListProxy;
 
 import javax.annotation.Nonnull;
@@ -457,19 +457,19 @@ public void checkInvariants()
     @Override
     public boolean equals(Object o)
     {
-        return (o == this) || ((o instanceof JImmutableList) && Cursors.areEqual(cursor(), ((JImmutableList)o).cursor()));
+        return (o == this) || ((o instanceof JImmutableList) && IteratorHelper.iteratorEquals(iterator(), ((JImmutableList)o).iterator()));
     }
 
     @Override
     public int hashCode()
     {
-        return Cursors.computeHashCode(cursor());
+        return IteratorHelper.iteratorHashCode(iterator());
     }
 
     @Override
     public String toString()
     {
-        return Cursors.makeString(cursor());
+        return IteratorHelper.iteratorToString(iterator());
     }
 
     private Object writeReplace()

src/test/java/org/javimmutable/collections/btree_list/JImmutableBtreeListTest.java

@@ -91,6 +91,8 @@ public void test()
         list.checkInvariants();
         StandardCursorTest.indexedCursorTest(list, list.size(), list.cursor());
         StandardCursorTest.indexedIteratorTest(list, list.size(), list.iterator());
+        assertEquals("[100,200]", list.toString());
+        assertEquals(3300, list.hashCode());
 
         JImmutableBtreeList<Integer> saved = list;