diff --git a/app/src/test/java/org/opencord/sadis/impl/SadisManagerTest.java b/app/src/test/java/org/opencord/sadis/impl/SadisManagerTest.java
new file mode 100644
index 0000000..4b89b40
--- /dev/null
+++ b/app/src/test/java/org/opencord/sadis/impl/SadisManagerTest.java
@@ -0,0 +1,293 @@
+/*
+ * Copyright 2017-present 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.opencord.sadis.impl;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.InputStream;
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreServiceAdapter;
+import org.onosproject.net.config.Config;
+import org.onosproject.net.config.ConfigApplyDelegate;
+import org.onosproject.net.config.NetworkConfigRegistryAdapter;
+
+import org.opencord.sadis.SubscriberAndDeviceInformation;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+/**
+ * Set of tests of the SADIS ONOS application component.
+ */
+public class SadisManagerTest {
+
+    private SadisManager sadis;
+
+    @Before
+    public void setUp() throws Exception {
+        this.sadis = new SadisManager();
+        this.sadis.coreService = new MockCoreService();
+
+        final InputStream jsonStream = SadisManagerTest.class.getResourceAsStream("/config.json");
+
+        final ObjectMapper mapper = new ObjectMapper();
+        final JsonNode testConfig = mapper.readTree(jsonStream);
+        final ConfigApplyDelegate delegate = new MockConfigDelegate();
+
+        final SadisConfig config = new SadisConfig();
+        final ApplicationId subject = this.sadis.coreService.registerApplication("org.opencord.sadis");
+
+        config.init(subject, "sadis-test", testConfig, mapper, delegate);
+
+        this.sadis.cfgService = new MockNetworkConfigRegistry(config);
+        this.sadis.activate();
+    }
+
+    @After
+    public void tearDown() {
+        this.sadis.deactivate();
+    }
+
+    @Test
+    public void testConfiguration() {
+        SadisConfig config = sadis.cfgService.getConfig(null, SadisConfig.class);
+        assertEquals(true, config.getCacheEnabled());
+        assertEquals(50, config.getCacheMaxSize());
+        assertEquals(Duration.parse("PT1m"), config.getCacheTtl());
+        List<SubscriberAndDeviceInformation> entries = config.getEntries();
+        assertEquals(3, entries.size());
+        assertTrue(SubscriberAndDeviceInformationBuilder.build("1", (short) 2, (short) 2, "1/1/2", (short) 125,
+                (short) 3, "aa:bb:cc:dd:ee:ff", "XXX-NASID", "10.10.10.10").checkEquals(entries.get(0)));
+        assertTrue(SubscriberAndDeviceInformationBuilder.build("2", (short) 4, (short) 4, "1/1/2", (short) 129,
+                (short) 4, "aa:bb:cc:dd:ee:ff", "YYY-NASID", "1.1.1.1").checkEquals(entries.get(1)));
+        assertTrue(SubscriberAndDeviceInformationBuilder.build("cc:dd:ee:ff:aa:bb", (short) -1, (short) -1, null,
+                (short) -1,
+                (short) -1, "cc:dd:ee:ff:aa:bb", "CCC-NASID", "12.12.12.12").checkEquals(entries.get(2)));
+
+    }
+
+    // Mocks live here
+
+    private static final class SubscriberAndDeviceInformationBuilder extends SubscriberAndDeviceInformation {
+
+        public static SubscriberAndDeviceInformationBuilder build(String id, short cTag, short sTag, String nasPortId,
+                short port, short slot, String mac, String nasId, String ipAddress) {
+            //SubscriberAndDeviceInformation info = new SubscriberAndDeviceInformation();
+            SubscriberAndDeviceInformationBuilder info = new SubscriberAndDeviceInformationBuilder();
+            info.setId(id);
+            if (cTag != -1) {
+                info.setCTag(VlanId.vlanId(cTag));
+            }
+            if (sTag != -1) {
+                info.setSTag(VlanId.vlanId(sTag));
+            }
+            info.setNasPortId(nasPortId);
+            if (port != -1) {
+                info.setPort(port);
+            }
+            if (slot != -1) {
+                info.setSlot(slot);
+            }
+            info.setHardwareIdentifier(MacAddress.valueOf(mac));
+            info.setIPAddress(Ip4Address.valueOf(ipAddress));
+            info.setNasId(nasId);
+            return info;
+        }
+
+        public boolean checkEquals(SubscriberAndDeviceInformation other) {
+            if (other == null) {
+                return false;
+            }
+            if (this.cTag() == null) {
+                if (other.cTag() != null) {
+                    return false;
+                }
+            } else if (!this.cTag().equals(other.cTag())) {
+                return false;
+            }
+            if (this.hardwareIdentifier() == null) {
+                if (other.hardwareIdentifier() != null) {
+                    return false;
+                }
+            } else if (!this.hardwareIdentifier().equals(other.hardwareIdentifier())) {
+                return false;
+            }
+            if (this.id() == null) {
+                if (other.id() != null) {
+                    return false;
+                }
+            } else if (!this.id().equals(other.id())) {
+                return false;
+            }
+            if (this.nasPortId() == null) {
+                if (other.nasPortId() != null) {
+                    return false;
+                }
+            } else if (!this.nasPortId().equals(other.nasPortId())) {
+                return false;
+            }
+            if (this.nasId() == null) {
+                if (other.nasId() != null) {
+                    return false;
+                }
+            } else if (!this.nasId().equals(other.nasId())) {
+                return false;
+            }
+            if (this.ipAddress() == null) {
+                if (other.ipAddress() != null) {
+                    return false;
+                }
+            } else if (!this.ipAddress().equals(other.ipAddress())) {
+                return false;
+            }
+            if (this.port() != other.port()) {
+                return false;
+            }
+            if (this.sTag() == null) {
+                if (other.sTag() != null) {
+                    return false;
+                }
+            } else if (!this.sTag().equals(other.sTag())) {
+                return false;
+            }
+            if (this.slot() != other.slot()) {
+                return false;
+            }
+            return true;
+        }
+    }
+
+    /**
+     * Mocks an ONOS configuration delegate to allow JSON based configuration to
+     * be tested.
+     */
+    private static final class MockConfigDelegate implements ConfigApplyDelegate {
+        @Override
+        public void onApply(@SuppressWarnings("rawtypes") Config config) {
+            config.apply();
+        }
+    }
+
+    /**
+     * Mocks an instance of {@link ApplicationId} so that the application
+     * component under test can query and use its application ID.
+     */
+    private static final class MockApplicationId implements ApplicationId {
+
+        private final short id;
+        private final String name;
+
+        public MockApplicationId(short id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+
+        @Override
+        public short id() {
+            return id;
+        }
+
+        @Override
+        public String name() {
+            return name;
+        }
+    }
+
+    /**
+     * Mocks the core services of ONOS so that the application under test can
+     * register and query application IDs.
+     */
+    private static final class MockCoreService extends CoreServiceAdapter {
+
+        private List<ApplicationId> idList = new ArrayList<ApplicationId>();
+        private Map<String, ApplicationId> idMap = new HashMap<String, ApplicationId>();
+
+        /*
+         * (non-Javadoc)
+         *
+         * @see
+         * org.onosproject.core.CoreServiceAdapter#getAppId(java.lang.Short)
+         */
+        @Override
+        public ApplicationId getAppId(Short id) {
+            if (id >= idList.size()) {
+                return null;
+            }
+            return idList.get(id);
+        }
+
+        /*
+         * (non-Javadoc)
+         *
+         * @see
+         * org.onosproject.core.CoreServiceAdapter#getAppId(java.lang.String)
+         */
+        @Override
+        public ApplicationId getAppId(String name) {
+            return idMap.get(name);
+        }
+
+        /*
+         * (non-Javadoc)
+         *
+         * @see
+         * org.onosproject.core.CoreServiceAdapter#registerApplication(java.lang
+         * .String)
+         */
+        @Override
+        public ApplicationId registerApplication(String name) {
+            ApplicationId appId = idMap.get(name);
+            if (appId == null) {
+                appId = new MockApplicationId((short) idList.size(), name);
+                idList.add(appId);
+                idMap.put(name, appId);
+            }
+            return appId;
+        }
+
+    }
+
+    /**
+     * Mocks the ONOS network configuration registry so that the application
+     * under test can access a JSON defined configuration.
+     */
+    static final class MockNetworkConfigRegistry extends NetworkConfigRegistryAdapter {
+        private final SadisConfig config;
+
+        public MockNetworkConfigRegistry(final SadisConfig config) {
+            this.config = config;
+        }
+
+        @SuppressWarnings("unchecked")
+        @Override
+        public <S, C extends Config<S>> C getConfig(final S subject, final Class<C> configClass) {
+            return (C) this.config;
+        }
+    }
+}