diff --git a/core/api/src/test/java/org/onlab/onos/net/flow/DefaultTrafficSelectorTest.java b/core/api/src/test/java/org/onlab/onos/net/flow/DefaultTrafficSelectorTest.java
new file mode 100644
index 0000000..b3e2acf
--- /dev/null
+++ b/core/api/src/test/java/org/onlab/onos/net/flow/DefaultTrafficSelectorTest.java
@@ -0,0 +1,195 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * Licensed 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.onlab.onos.net.flow;
+
+import java.util.Set;
+
+import org.hamcrest.Description;
+import org.hamcrest.Factory;
+import org.hamcrest.Matcher;
+import org.hamcrest.TypeSafeMatcher;
+import org.junit.Test;
+import org.onlab.onos.net.PortNumber;
+import org.onlab.onos.net.flow.criteria.Criteria;
+import org.onlab.onos.net.flow.criteria.Criterion;
+import org.onlab.packet.IpPrefix;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+
+import com.google.common.testing.EqualsTester;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
+import static org.onlab.onos.net.flow.criteria.Criterion.Type;
+
+/**
+ * Unit tests for default traffic selector class.
+ */
+public class DefaultTrafficSelectorTest {
+
+    /**
+     * Checks that the DefaultFlowRule class is immutable.
+     */
+    @Test
+    public void testImmutability() {
+        assertThatClassIsImmutable(DefaultTrafficSelector.class);
+    }
+
+    /**
+     * Tests equals(), hashCode() and toString() methods.
+     */
+    @Test
+    public void testEquals() {
+        final short one = 1;
+        final short two = 2;
+
+        final TrafficSelector selector1 =
+                DefaultTrafficSelector.builder().matchLambda(one).build();
+        final TrafficSelector sameAsSelector1 =
+                DefaultTrafficSelector.builder().matchLambda(one).build();
+        final TrafficSelector selector2 =
+                DefaultTrafficSelector.builder().matchLambda(two).build();
+
+        new EqualsTester()
+                .addEqualityGroup(selector1, sameAsSelector1)
+                .addEqualityGroup(selector2)
+                .testEquals();
+    }
+
+    /**
+     * Hamcrest matcher to check that a collection of Intents contains an
+     * Intent with the specified Intent Id.
+     */
+    public static final class CriterionExistsMatcher
+           extends TypeSafeMatcher<TrafficSelector> {
+        private final Criterion.Type type;
+
+        public CriterionExistsMatcher(Criterion.Type typeValue) {
+            type = typeValue;
+        }
+
+        @Override
+        public boolean matchesSafely(TrafficSelector selector) {
+            final Set<Criterion> criteria = selector.criteria();
+
+            return notNullValue().matches(criteria) &&
+                   hasSize(1).matches(criteria) &&
+                   notNullValue().matches(selector.getCriterion(type));
+        }
+
+        @Override
+        public void describeTo(Description description) {
+            description.appendText("a criterion with type \" ").
+                    appendText(type.toString()).
+                    appendText("\"");
+        }
+    }
+
+
+    /**
+     * Factory method to create a criterion type matcher.  Returns a matcher
+     * for a criterion with the given type.
+     *
+     * @param type type of Criterion to match
+     * @return Matcher object
+     */
+    @Factory
+    public static Matcher<TrafficSelector> hasCriterionWithType(Criterion.Type type) {
+        return new CriterionExistsMatcher(type);
+    }
+
+
+    /**
+     * Tests the builder functions that add specific criteria.
+     */
+    @Test
+    public void testCriteriaCreation() {
+        TrafficSelector selector;
+
+        final short shortValue = 33;
+        final byte byteValue = 44;
+        final IpPrefix ipPrefixValue = IpPrefix.valueOf("192.168.1.0/24");
+
+        selector = DefaultTrafficSelector.builder()
+                .matchInport(PortNumber.portNumber(11)).build();
+        assertThat(selector, hasCriterionWithType(Type.IN_PORT));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchEthSrc(MacAddress.BROADCAST).build();
+        assertThat(selector, hasCriterionWithType(Type.ETH_SRC));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchEthDst(MacAddress.BROADCAST).build();
+        assertThat(selector, hasCriterionWithType(Type.ETH_DST));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchEthType(shortValue).build();
+        assertThat(selector, hasCriterionWithType(Type.ETH_TYPE));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchVlanId(VlanId.vlanId(shortValue)).build();
+        assertThat(selector, hasCriterionWithType(Type.VLAN_VID));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchVlanPcp(byteValue).build();
+        assertThat(selector, hasCriterionWithType(Type.VLAN_PCP));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchIPProtocol(byteValue).build();
+        assertThat(selector, hasCriterionWithType(Type.IP_PROTO));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchIPSrc(ipPrefixValue).build();
+        assertThat(selector, hasCriterionWithType(Type.IPV4_SRC));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchIPDst(ipPrefixValue).build();
+        assertThat(selector, hasCriterionWithType(Type.IPV4_DST));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchTcpSrc(shortValue).build();
+        assertThat(selector, hasCriterionWithType(Type.TCP_SRC));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchTcpDst(shortValue).build();
+        assertThat(selector, hasCriterionWithType(Type.TCP_DST));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchMplsLabel(3).build();
+        assertThat(selector, hasCriterionWithType(Type.MPLS_LABEL));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchLambda(shortValue).build();
+        assertThat(selector, hasCriterionWithType(Type.OCH_SIGID));
+
+        selector = DefaultTrafficSelector.builder()
+                .matchOpticalSignalType(shortValue).build();
+        assertThat(selector, hasCriterionWithType(Type.OCH_SIGTYPE));
+
+        final TrafficSelector baseSelector = DefaultTrafficSelector.builder()
+                .matchOpticalSignalType(shortValue).build();
+        selector = DefaultTrafficSelector.builder(baseSelector)
+                .build();
+        assertThat(selector, hasCriterionWithType(Type.OCH_SIGTYPE));
+
+        final Criterion criterion = Criteria.matchLambda(shortValue);
+        selector = DefaultTrafficSelector.builder()
+                .add(criterion).build();
+        assertThat(selector, hasCriterionWithType(Type.OCH_SIGID));
+    }
+}