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package org.glassfish.jersey.examples.feedcombiner.store;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import org.glassfish.jersey.examples.feedcombiner.model.CombinedFeed;
import org.glassfish.jersey.examples.feedcombiner.model.FeedEntry;
import org.apache.commons.lang3.SerializationUtils;
import org.easymock.Capture;
import org.easymock.EasyMock;
import org.easymock.EasyMockRule;
import org.easymock.EasyMockSupport;
import org.easymock.Mock;
import org.easymock.MockType;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import static org.easymock.EasyMock.capture;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;
/**
* @author Petr Bouda (petr.bouda at oracle.com)
*/
public class ReadWriteLockDataStoreTest extends EasyMockSupport {
@Rule
public EasyMockRule mocks = new EasyMockRule(this);
@Mock(type = MockType.STRICT)
private DataStoreObserver observer;
private ReadWriteLockDataStore testedClass;
@Before
public void init() {
testedClass = new ReadWriteLockDataStore();
testedClass.addObserver(observer);
}
@Test
public void testSaveEntity() {
String id = "1";
CombinedFeed feed = new CombinedFeed.CombinedFeedBuilder(id, "http://localhost")
.title("title")
.description("description")
.refreshPeriod(5L).build();
observer.save(feed);
replayAll();
Serializable previousEntity = testedClass.put(id, feed);
verifyAll();
assertNull(previousEntity);
}
@Test
public void testUpdateEntity() {
String id = "1";
CombinedFeed feed = getCombinedFeed(id);
observer.save(feed);
replayAll();
// save entity
testedClass.put(id, feed);
CombinedFeed updatedFeed = CombinedFeed.CombinedFeedBuilder.of(feed)
.title("updated_title")
.description("updated_description")
.build();
// update entity
Serializable previousEntity = testedClass.put(id, updatedFeed);
verifyAll();
if (!(previousEntity instanceof CombinedFeed)) {
fail("The previous entity is not an instance of CombinedFeed");
}
assertEquals(feed, previousEntity);
}
@Test
public void testRemoveEntity() {
String id = "1";
CombinedFeed feed = getCombinedFeed(id);
observer.save(feed);
observer.remove(id);
replayAll();
// save entity
testedClass.put(id, feed);
Serializable removedEntity = testedClass.put(id, null);
verifyAll();
if (!(removedEntity instanceof CombinedFeed)) {
fail("The previous entity is not an instance of CombinedFeed");
}
assertEquals(feed, removedEntity);
}
@Test(expected = NullPointerException.class)
public void testSaveEntityWithNullKey() {
String id = null;
CombinedFeed feed = getCombinedFeed(id);
observer.save(feed);
replayAll();
// save entity
testedClass.put(id, feed);
verifyAll();
}
@Test
public void testGetEntity() {
String id = "1";
CombinedFeed feed = getCombinedFeed(id);
observer.save(feed);
replayAll();
// save entity
testedClass.put(id, feed);
CombinedFeed fetchedFeed = testedClass.get(id, CombinedFeed.class);
verifyAll();
assertEquals(feed, fetchedFeed);
}
@Test(expected = NullPointerException.class)
public void testGetEntityNullKey() {
testedClass.get(null, CombinedFeed.class);
}
@Test(expected = NullPointerException.class)
public void testGetEntityNullClass() {
testedClass.get("1", null);
}
@Test
public void testGetNullEntity() {
CombinedFeed combinedFeed = testedClass.get("1", CombinedFeed.class);
assertNull(combinedFeed);
}
@Test(expected = ClassCastException.class)
public void testGetEntityWrongCast() {
String id = "1";
CombinedFeed feed = getCombinedFeed(id);
observer.save(feed);
replayAll();
// save entity
testedClass.put(id, feed);
testedClass.get(id, FeedEntry.class);
verifyAll();
}
@Test
public void saveDatastoreIsNotClosed() {
try {
testedClass.save(new OutputStreamStub());
} catch (UnsupportedOperationException e) {
fail("It is not allowed to call a method close on OutputStream");
} catch (IOException e) {
fail("Unexpected Error");
}
}
@Test
public void loadDatastoreIsNotClosed() {
try {
byte[] serializedDatastore = SerializationUtils.serialize(new HashMap<String, Serializable>());
testedClass.load(new InputStreamStub(serializedDatastore));
} catch (UnsupportedOperationException e) {
fail("It is not allowed to call a method close on InputStream");
} catch (IOException e) {
fail("Unexpected Error");
}
}
@Test
public void testSaveDatastore() {
// Insert new combined Feed
String id = "1";
CombinedFeed feed = new CombinedFeed.CombinedFeedBuilder(id, "http://localhost")
.title("title")
.description("description")
.refreshPeriod(5L).build();
observer.save(feed);
replayAll();
testedClass.put(id, feed);
// Copy the datastore into the stream
try {
ByteArrayOutputStream output = new ByteArrayOutputStream();
testedClass.save(output);
// Deserialize the datastore
Map<String, Serializable> entities =
SerializationUtils.<Map<String, Serializable>>deserialize(output.toByteArray());
// Check whether is the saved entity was deserialized successfully or not
Serializable serializableEntity = entities.get(id);
if (serializableEntity instanceof CombinedFeed) {
CombinedFeed fetchedFeed = (CombinedFeed) serializableEntity;
assertEquals(feed, fetchedFeed);
} else {
fail("Deserialized entity is not CombinedFeed Class");
}
} catch (IOException e) {
fail(e.getMessage());
}
verifyAll();
}
@Test
public void testLoadDatastore() {
// Insert new combined Feed
String id = "1";
CombinedFeed feed = new CombinedFeed.CombinedFeedBuilder(id, "http://localhost")
.title("title")
.description("description")
.refreshPeriod(5L).build();
// call save mock
observer.save(feed);
// Create a datastore with one Combined Feed and serialize it
String id2 = "2";
CombinedFeed deserializedFeed = new CombinedFeed.CombinedFeedBuilder(id2, "http://localhost")
.title("deserialized_title")
.description("deserialized_description")
.refreshPeriod(5L).build();
HashMap<String, Serializable> datastore = new HashMap<>();
datastore.put(id2, deserializedFeed);
// call mocks after a load of the datastore
Capture<Set<String>> captureRemoveAll = EasyMock.newCapture();
Capture<Collection<Serializable>> captureSaveAll = EasyMock.newCapture();
observer.removeAll(capture(captureRemoveAll));
observer.saveAll(capture(captureSaveAll));
replayAll();
// Insert feed into the old datastore
testedClass.put(id, feed);
byte[] serializedDatastore = SerializationUtils.serialize(datastore);
// Load the serialized datastore
ByteArrayInputStream input = new ByteArrayInputStream(serializedDatastore);
try {
testedClass.load(input);
// Test that the new datastore does not contain old Combined Feed
CombinedFeed previousCombinedFeed = testedClass.get(id, CombinedFeed.class);
if (previousCombinedFeed != null) {
fail("The previous combined feed should be deleted.");
}
// Test that the new datastore contains new Combined Feed
CombinedFeed newCombinedFeed = testedClass.get(id2, CombinedFeed.class);
assertEquals(deserializedFeed, newCombinedFeed);
} catch (IOException e) {
fail(e.getMessage());
}
verifyAll();
// Verify captured values
// Check whether the registered observer was called because of removing entities
Set<String> previousKeySet = captureRemoveAll.getValue();
if (!previousKeySet.contains(id)) {
fail("The previous keys should be deleted.");
}
// Check whether the registered observer was called because of saving entities
Collection<Serializable> newlySavedEntities = captureSaveAll.getValue();
assertEquals(1, newlySavedEntities.size());
boolean exists = newlySavedEntities.stream()
.map(CombinedFeed.class::cast)
.anyMatch(entity -> Objects.equals(entity.getId(), id2));
if (!exists) {
fail("The new stored CombinedFeed was not found.");
}
}
@Test
public void testLoadCastException() {
byte[] serializedObject = SerializationUtils.serialize("Wrong object");
ByteArrayInputStream input = new ByteArrayInputStream(serializedObject);
try {
testedClass.load(input);
} catch (IOException e) {
fail("Any IOException should not occur.");
}
}
private CombinedFeed getCombinedFeed(String id) {
return new CombinedFeed.CombinedFeedBuilder(id, "http://localhost")
.title("title")
.description("description")
.refreshPeriod(5L).build();
}
}