diff --git a/src/test/java/net/onrc/onos/core/datastore/utils/ByteArrayUtilTest.java b/src/test/java/net/onrc/onos/core/datastore/utils/ByteArrayUtilTest.java
new file mode 100644
index 0000000..926135f
--- /dev/null
+++ b/src/test/java/net/onrc/onos/core/datastore/utils/ByteArrayUtilTest.java
@@ -0,0 +1,70 @@
+package net.onrc.onos.core.datastore.utils;
+
+import org.hamcrest.MatcherAssert;
+import org.junit.Test;
+
+import static net.onrc.onos.core.util.UtilityClassChecker.assertThatClassIsUtility;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+
+/**
+ * Test cases for the ByteArrayUtil class.
+ */
+
+public class ByteArrayUtilTest {
+
+    /**
+     * Make sure that the ByteArrayUtil class is a utility class.
+     */
+    @Test
+    public void testForWellDefinedUtilityClass() throws Exception {
+        assertThatClassIsUtility(ByteArrayUtil.class);
+    }
+
+    /**
+     * Test that when given a null array for the bytes to convert, the hex
+     * conversion routines return an empty StringBuilder.
+     */
+    @Test
+    public void testToHexStringBuilderNullParameter() {
+        final StringBuilder allocatedBuilder =
+                ByteArrayUtil.toHexStringBuilder(null, "");
+        MatcherAssert.assertThat(allocatedBuilder, is(notNullValue()));
+        MatcherAssert.assertThat(allocatedBuilder.toString(), is(equalTo("")));
+
+        final StringBuilder providedBuilder = new StringBuilder();
+        final StringBuilder returnedBuilder = ByteArrayUtil.toHexStringBuilder
+                (null, "", providedBuilder);
+        MatcherAssert.assertThat(providedBuilder, is(notNullValue()));
+        MatcherAssert.assertThat(returnedBuilder, is(equalTo(providedBuilder)));
+        MatcherAssert.assertThat(providedBuilder.toString(), is(equalTo("")));
+    }
+
+    /**
+     * Test the array byte to String conversion routines to be sure the data
+     * is converted properly.
+     */
+    @Test
+    public void testToHexStringBuilder() {
+        final byte[] testData = {0x1,  0x2,  0x3,  0x4,  0x5,
+                                 0x3b, 0x3c, 0x3d, 0x3e, 0x3f};
+        final String expectedResult = "1:2:3:4:5:3b:3c:3d:3e:3f";
+
+        final StringBuilder result =
+                ByteArrayUtil.toHexStringBuilder(testData, ":");
+
+        MatcherAssert.assertThat(result, is(notNullValue()));
+        MatcherAssert.assertThat(result.toString(),
+                is(equalTo(expectedResult)));
+        
+        final StringBuilder providedBuilder = new StringBuilder();
+        final StringBuilder returnedBuilder =
+                ByteArrayUtil.toHexStringBuilder(testData, ":", providedBuilder);
+
+        MatcherAssert.assertThat(returnedBuilder, is(notNullValue()));
+        MatcherAssert.assertThat(returnedBuilder, is(equalTo(providedBuilder)));
+        MatcherAssert.assertThat(returnedBuilder.toString(),
+                is(equalTo(expectedResult)));
+    }
+}