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diff --git a/framework/src/onos/core/common/src/test/java/org/onosproject/codec/impl/InstructionCodecTest.java b/framework/src/onos/core/common/src/test/java/org/onosproject/codec/impl/InstructionCodecTest.java
new file mode 100644
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+++ b/framework/src/onos/core/common/src/test/java/org/onosproject/codec/impl/InstructionCodecTest.java
@@ -0,0 +1,247 @@
+/*
+ * Copyright 2015 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.onosproject.codec.impl;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.Ip6Address;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.MplsLabel;
+import org.onlab.packet.VlanId;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.net.ChannelSpacing;
+import org.onosproject.net.GridType;
+import org.onosproject.net.IndexedLambda;
+import org.onosproject.net.Lambda;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.flow.instructions.Instruction;
+import org.onosproject.net.flow.instructions.Instructions;
+import org.onosproject.net.flow.instructions.L0ModificationInstruction;
+import org.onosproject.net.flow.instructions.L2ModificationInstruction;
+import org.onosproject.net.flow.instructions.L3ModificationInstruction;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.onosproject.codec.impl.InstructionJsonMatcher.matchesInstruction;
+
+/**
+ * Unit tests for Instruction codec.
+ */
+public class InstructionCodecTest {
+    CodecContext context;
+    JsonCodec<Instruction> instructionCodec;
+
+    /**
+     * Sets up for each test.  Creates a context and fetches the instruction
+     * codec.
+     */
+    @Before
+    public void setUp() {
+        context = new MockCodecContext();
+        instructionCodec = context.codec(Instruction.class);
+        assertThat(instructionCodec, notNullValue());
+    }
+
+    /**
+     * Tests the encoding of push header instructions.
+     */
+    @Test
+    public void pushHeaderInstructionsTest() {
+        final L2ModificationInstruction.PushHeaderInstructions instruction =
+                (L2ModificationInstruction.PushHeaderInstructions) Instructions.pushMpls();
+        final ObjectNode instructionJson = instructionCodec.encode(instruction, context);
+
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of drop instructions.
+     */
+    @Test
+    public void dropInstructionTest() {
+        final Instructions.DropInstruction instruction =
+                Instructions.createDrop();
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of output instructions.
+     */
+    @Test
+    public void outputInstructionTest() {
+        final Instructions.OutputInstruction instruction =
+                Instructions.createOutput(PortNumber.portNumber(22));
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod lambda instructions.
+     */
+    @Test
+    public void modLambdaInstructionTest() {
+        final L0ModificationInstruction.ModLambdaInstruction instruction =
+                (L0ModificationInstruction.ModLambdaInstruction)
+                        Instructions.modL0Lambda(new IndexedLambda(55));
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod OCh signal instructions.
+     */
+    @Test
+    public void modOchSignalInstructionTest() {
+        L0ModificationInstruction.ModOchSignalInstruction instruction =
+                (L0ModificationInstruction.ModOchSignalInstruction)
+                        Instructions.modL0Lambda(Lambda.ochSignal(GridType.DWDM, ChannelSpacing.CHL_100GHZ, 4, 8));
+        ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod ether instructions.
+     */
+    @Test
+    public void modEtherInstructionTest() {
+        final L2ModificationInstruction.ModEtherInstruction instruction =
+                (L2ModificationInstruction.ModEtherInstruction)
+                        Instructions.modL2Src(MacAddress.valueOf("11:22:33:44:55:66"));
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod vlan id instructions.
+     */
+    @Test
+    public void modVlanIdInstructionTest() {
+        final L2ModificationInstruction.ModVlanIdInstruction instruction =
+                (L2ModificationInstruction.ModVlanIdInstruction)
+                        Instructions.modVlanId(VlanId.vlanId((short) 12));
+
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod vlan pcp instructions.
+     */
+    @Test
+    public void modVlanPcpInstructionTest() {
+        final L2ModificationInstruction.ModVlanPcpInstruction instruction =
+                (L2ModificationInstruction.ModVlanPcpInstruction)
+                        Instructions.modVlanPcp((byte) 9);
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod IPv4 src instructions.
+     */
+    @Test
+    public void modIPSrcInstructionTest() {
+        final Ip4Address ip = Ip4Address.valueOf("1.2.3.4");
+        final L3ModificationInstruction.ModIPInstruction instruction =
+                (L3ModificationInstruction.ModIPInstruction)
+                        Instructions.modL3Src(ip);
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod IPv4 dst instructions.
+     */
+    @Test
+    public void modIPDstInstructionTest() {
+        final Ip4Address ip = Ip4Address.valueOf("1.2.3.4");
+        final L3ModificationInstruction.ModIPInstruction instruction =
+                (L3ModificationInstruction.ModIPInstruction)
+                        Instructions.modL3Dst(ip);
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod IPv6 src instructions.
+     */
+    @Test
+    public void modIPv6SrcInstructionTest() {
+        final Ip6Address ip = Ip6Address.valueOf("1111::2222");
+        final L3ModificationInstruction.ModIPInstruction instruction =
+                (L3ModificationInstruction.ModIPInstruction)
+                        Instructions.modL3IPv6Src(ip);
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod IPv6 dst instructions.
+     */
+    @Test
+    public void modIPv6DstInstructionTest() {
+        final Ip6Address ip = Ip6Address.valueOf("1111::2222");
+        final L3ModificationInstruction.ModIPInstruction instruction =
+                (L3ModificationInstruction.ModIPInstruction)
+                        Instructions.modL3IPv6Dst(ip);
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod IPv6 flow label instructions.
+     */
+    @Test
+    public void modIPv6FlowLabelInstructionTest() {
+        final int flowLabel = 0xfffff;
+        final L3ModificationInstruction.ModIPv6FlowLabelInstruction instruction =
+                (L3ModificationInstruction.ModIPv6FlowLabelInstruction)
+                        Instructions.modL3IPv6FlowLabel(flowLabel);
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+    /**
+     * Tests the encoding of mod MPLS label instructions.
+     */
+    @Test
+    public void modMplsLabelInstructionTest() {
+        final L2ModificationInstruction.ModMplsLabelInstruction instruction =
+                (L2ModificationInstruction.ModMplsLabelInstruction)
+                        Instructions.modMplsLabel(MplsLabel.mplsLabel(99));
+        final ObjectNode instructionJson =
+                instructionCodec.encode(instruction, context);
+        assertThat(instructionJson, matchesInstruction(instruction));
+    }
+
+}