fixes #803 added test to ColumnValue
diff --git a/modules/api/src/test/java/org/apache/fluo/api/data/ColumnValueTest.java b/modules/api/src/test/java/org/apache/fluo/api/data/ColumnValueTest.java
new file mode 100644
index 0000000..c88d8a3
--- /dev/null
+++ b/modules/api/src/test/java/org/apache/fluo/api/data/ColumnValueTest.java
@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
+ * agreements. See the NOTICE file distributed with this work for additional information regarding
+ * copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License. You may obtain a
+ * copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.apache.fluo.api.data;
+
+import java.util.Arrays;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ColumnValueTest {
+
+
+
+  @Test
+  public void testEquals() {
+    Column c1 = new Column("f1", "q1");
+    Column c2 = new Column("f2", "q1");
+    Column c3 = new Column("f1", "q2");
+    Column c4 = new Column("f2", "q2");
+
+    ColumnValue cv = new ColumnValue(c1, "v1");
+
+    Assert.assertEquals(cv, cv);
+    Assert.assertEquals(cv.hashCode(), cv.hashCode());
+    Assert.assertEquals(new ColumnValue(c1, "v1"), cv);
+    Assert.assertEquals(new ColumnValue(c1, "v1").hashCode(), cv.hashCode());
+    Assert.assertNotEquals(new ColumnValue(c1, "v2"), cv);
+    Assert.assertNotEquals(new ColumnValue(c1, "v2").hashCode(), cv.hashCode());
+
+    for (Column c : Arrays.asList(c2, c3, c4)) {
+      for (String v : Arrays.asList("v1", "v2")) {
+        ColumnValue ocv = new ColumnValue(c, v);
+        Assert.assertNotEquals(ocv, cv);
+        Assert.assertNotEquals(ocv.hashCode(), cv.hashCode());
+      }
+    }
+
+    Assert.assertNotEquals(cv, c1);
+    Assert.assertNotEquals(cv, "v1");
+  }
+
+  @Test
+  public void testCompare() {
+    Column c1 = new Column("f1", "q1");
+    Column c2 = new Column("f2", "q1");
+
+    ColumnValue cv1 = new ColumnValue(c1, "v1");
+    ColumnValue cv2 = new ColumnValue(c2, "v1");
+    ColumnValue cv3 = new ColumnValue(c1, "v2");
+    ColumnValue cv4 = new ColumnValue(c1, "v1");
+
+    Assert.assertTrue(cv1.compareTo(cv1) == 0);
+    Assert.assertTrue(cv1.compareTo(cv4) == 0);
+    Assert.assertTrue(cv1.compareTo(cv2) < 0);
+    Assert.assertTrue(cv2.compareTo(cv1) > 0);
+    Assert.assertTrue(cv1.compareTo(cv3) < 0);
+    Assert.assertTrue(cv3.compareTo(cv1) > 0);
+  }
+
+  @Test
+  public void testGet() {
+    Column c1 = new Column("f1", "q1");
+    ColumnValue cv1 = new ColumnValue(c1, "v1");
+
+    Assert.assertEquals("v1", cv1.getsValue());
+    Assert.assertEquals("v1", cv1.getValue().toString());
+    Assert.assertSame(c1, cv1.getColumn());
+  }
+}