use of org.apache.geode.test.dunit.SerializableCallable in project geode by apache.
the class FunctionServiceStatsDUnitTest method testClientServerPartitonedRegionFunctionExecutionStats.
/**
* 1-client 3-Servers Function : TEST_FUNCTION2 Function : TEST_FUNCTION3 Execution of the
* function on serverRegion with set multiple keys as the routing object and using the name of the
* function
*
* On server side, function execution calls should be equal to the no of function executions
* completed.
*/
@Test
public void testClientServerPartitonedRegionFunctionExecutionStats() {
createScenario();
Function function = new TestFunction(true, TestFunction.TEST_FUNCTION2);
registerFunctionAtServer(function);
function = new TestFunction(true, TestFunction.TEST_FUNCTION3);
registerFunctionAtServer(function);
isByName = new Boolean(true);
client.invoke(initializeStats);
server1.invoke(initializeStats);
server2.invoke(initializeStats);
server3.invoke(initializeStats);
SerializableCallable PopulateRegionAndExecuteFunctions = new SerializableCallable("PopulateRegionAndExecuteFunctions") {
public Object call() throws Exception {
Region region = cache.getRegion(PartitionedRegionName);
assertNotNull(region);
final HashSet testKeysSet = new HashSet();
for (int i = (totalNumBuckets.intValue() * 2); i > 0; i--) {
testKeysSet.add("execKey-" + i);
}
DistributedSystem.setThreadsSocketPolicy(false);
Function function = new TestFunction(true, TestFunction.TEST_FUNCTION2);
FunctionService.registerFunction(function);
Execution dataSet = FunctionService.onRegion(region);
try {
int j = 0;
HashSet origVals = new HashSet();
for (Iterator i = testKeysSet.iterator(); i.hasNext(); ) {
Integer val = new Integer(j++);
origVals.add(val);
region.put(i.next(), val);
}
ResultCollector rc = dataSet.withFilter(testKeysSet).setArguments(Boolean.TRUE).execute(function.getId());
int resultSize = ((List) rc.getResult()).size();
resultReceived_Aggregate += resultSize;
resultReceived_TESTFUNCTION2 += resultSize;
noOfExecutionCalls_Aggregate++;
noOfExecutionCalls_TESTFUNCTION2++;
noOfExecutionsCompleted_Aggregate++;
noOfExecutionsCompleted_TESTFUNCTION2++;
rc = dataSet.withFilter(testKeysSet).setArguments(testKeysSet).execute(function.getId());
resultSize = ((List) rc.getResult()).size();
resultReceived_Aggregate += resultSize;
resultReceived_TESTFUNCTION2 += resultSize;
noOfExecutionCalls_Aggregate++;
noOfExecutionCalls_TESTFUNCTION2++;
noOfExecutionsCompleted_Aggregate++;
noOfExecutionsCompleted_TESTFUNCTION2++;
function = new TestFunction(true, TestFunction.TEST_FUNCTION3);
FunctionService.registerFunction(function);
rc = dataSet.withFilter(testKeysSet).setArguments(Boolean.TRUE).execute(function.getId());
resultSize = ((List) rc.getResult()).size();
resultReceived_Aggregate += resultSize;
resultReceived_TESTFUNCTION3 += resultSize;
noOfExecutionCalls_Aggregate++;
noOfExecutionCalls_TESTFUNCTION3++;
noOfExecutionsCompleted_Aggregate++;
noOfExecutionsCompleted_TESTFUNCTION3++;
} catch (Exception e) {
LogWriterUtils.getLogWriter().info("Exception : " + e.getMessage());
e.printStackTrace();
fail("Test failed after the put operation");
}
return Boolean.TRUE;
}
};
client.invoke(PopulateRegionAndExecuteFunctions);
SerializableCallable checkStatsOnClient = new SerializableCallable("checkStatsOnClient") {
public Object call() throws Exception {
// checks for the aggregate stats
InternalDistributedSystem iDS = (InternalDistributedSystem) cache.getDistributedSystem();
FunctionServiceStats functionServiceStats = iDS.getFunctionServiceStats();
waitNoFunctionsRunning(functionServiceStats);
assertEquals(noOfExecutionCalls_Aggregate, functionServiceStats.getFunctionExecutionCalls());
assertEquals(noOfExecutionsCompleted_Aggregate, functionServiceStats.getFunctionExecutionsCompleted());
assertTrue(functionServiceStats.getResultsReceived() >= resultReceived_Aggregate);
LogWriterUtils.getLogWriter().info("Calling FunctionStats for TEST_FUNCTION2 :");
FunctionStats functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION2, iDS);
LogWriterUtils.getLogWriter().info("Called FunctionStats for TEST_FUNCTION2 :");
assertEquals(noOfExecutionCalls_TESTFUNCTION2, functionStats.getFunctionExecutionCalls());
assertEquals(noOfExecutionsCompleted_TESTFUNCTION2, functionStats.getFunctionExecutionsCompleted());
assertTrue(functionStats.getResultsReceived() >= resultReceived_TESTFUNCTION2);
functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION3, iDS);
assertEquals(noOfExecutionCalls_TESTFUNCTION3, functionStats.getFunctionExecutionCalls());
assertEquals(noOfExecutionsCompleted_TESTFUNCTION3, functionStats.getFunctionExecutionsCompleted());
assertTrue(functionStats.getResultsReceived() >= resultReceived_TESTFUNCTION3);
return Boolean.TRUE;
}
};
client.invoke(checkStatsOnClient);
SerializableCallable checkStatsOnServer = new SerializableCallable("checkStatsOnClient") {
public Object call() throws Exception {
// checks for the aggregate stats
InternalDistributedSystem iDS = (InternalDistributedSystem) cache.getDistributedSystem();
FunctionServiceStats functionServiceStats = iDS.getFunctionServiceStats();
waitNoFunctionsRunning(functionServiceStats);
// functions are executed 3 times
noOfExecutionCalls_Aggregate += 3;
assertTrue(functionServiceStats.getFunctionExecutionCalls() >= noOfExecutionCalls_Aggregate);
noOfExecutionsCompleted_Aggregate += 3;
assertTrue(functionServiceStats.getFunctionExecutionsCompleted() >= noOfExecutionsCompleted_Aggregate);
FunctionStats functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION2, iDS);
// TEST_FUNCTION2 is executed twice
noOfExecutionCalls_TESTFUNCTION2 += 2;
assertTrue(functionStats.getFunctionExecutionCalls() >= noOfExecutionCalls_TESTFUNCTION2);
noOfExecutionsCompleted_TESTFUNCTION2 += 2;
assertTrue(functionStats.getFunctionExecutionsCompleted() >= noOfExecutionsCompleted_TESTFUNCTION2);
functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION3, iDS);
// TEST_FUNCTION3 is executed once
noOfExecutionCalls_TESTFUNCTION3 += 1;
assertTrue(functionStats.getFunctionExecutionCalls() >= noOfExecutionCalls_TESTFUNCTION3);
noOfExecutionsCompleted_TESTFUNCTION3 += 1;
assertTrue(functionStats.getFunctionExecutionsCompleted() >= noOfExecutionsCompleted_TESTFUNCTION3);
return Boolean.TRUE;
}
};
server1.invoke(checkStatsOnServer);
server2.invoke(checkStatsOnServer);
server3.invoke(checkStatsOnServer);
}
use of org.apache.geode.test.dunit.SerializableCallable in project geode by apache.
the class FunctionServiceStatsDUnitTest method testClientServerwithoutRegion.
/**
* Execution of the function on server using the name of the function TEST_FUNCTION1
* TEST_FUNCTION5 On client side, the no of result received should equal to the no of function
* execution calls. On server side, function execution calls should be equal to the no of function
* executions completed.
*/
@Test
public void testClientServerwithoutRegion() {
createClientServerScenarionWithoutRegion();
Function function = new TestFunction(true, TestFunction.TEST_FUNCTION1);
registerFunctionAtServer(function);
function = new TestFunction(true, TestFunction.TEST_FUNCTION5);
registerFunctionAtServer(function);
isByName = new Boolean(true);
client.invoke(initializeStats);
server1.invoke(initializeStats);
server2.invoke(initializeStats);
server3.invoke(initializeStats);
SerializableCallable ExecuteFunction = new SerializableCallable("ExecuteFunction") {
public Object call() throws Exception {
DistributedSystem.setThreadsSocketPolicy(false);
Function function = new TestFunction(true, TestFunction.TEST_FUNCTION1);
FunctionService.registerFunction(function);
Execution member = FunctionService.onServers(pool);
try {
ResultCollector rs = member.setArguments(Boolean.TRUE).execute(function.getId());
int size = ((List) rs.getResult()).size();
resultReceived_Aggregate += size;
noOfExecutionCalls_Aggregate++;
noOfExecutionsCompleted_Aggregate++;
resultReceived_TESTFUNCTION1 += size;
noOfExecutionCalls_TESTFUNCTION1++;
noOfExecutionsCompleted_TESTFUNCTION1++;
} catch (Exception ex) {
ex.printStackTrace();
LogWriterUtils.getLogWriter().info("Exception : ", ex);
fail("Test failed after the execute operation nn TRUE");
}
function = new TestFunction(true, TestFunction.TEST_FUNCTION5);
FunctionService.registerFunction(function);
try {
final HashSet testKeysSet = new HashSet();
for (int i = 0; i < 20; i++) {
testKeysSet.add("execKey-" + i);
}
ResultCollector rs = member.setArguments("Success").execute(function.getId());
int size = ((List) rs.getResult()).size();
resultReceived_Aggregate += size;
noOfExecutionCalls_Aggregate++;
noOfExecutionsCompleted_Aggregate++;
resultReceived_TESTFUNCTION5 += size;
noOfExecutionCalls_TESTFUNCTION5++;
noOfExecutionsCompleted_TESTFUNCTION5++;
} catch (Exception ex) {
ex.printStackTrace();
LogWriterUtils.getLogWriter().info("Exception : ", ex);
fail("Test failed after the execute operationssssss");
}
return Boolean.TRUE;
}
};
client.invoke(ExecuteFunction);
SerializableCallable checkStatsOnClient = new SerializableCallable("checkStatsOnClient") {
public Object call() throws Exception {
// checks for the aggregate stats
InternalDistributedSystem iDS = (InternalDistributedSystem) cache.getDistributedSystem();
FunctionServiceStats functionServiceStats = iDS.getFunctionServiceStats();
waitNoFunctionsRunning(functionServiceStats);
assertEquals(noOfExecutionCalls_Aggregate, functionServiceStats.getFunctionExecutionCalls());
assertEquals(noOfExecutionsCompleted_Aggregate, functionServiceStats.getFunctionExecutionsCompleted());
assertEquals(resultReceived_Aggregate, functionServiceStats.getResultsReceived());
FunctionStats functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION1, iDS);
assertEquals(noOfExecutionCalls_TESTFUNCTION1, functionStats.getFunctionExecutionCalls());
assertEquals(noOfExecutionsCompleted_TESTFUNCTION1, functionStats.getFunctionExecutionsCompleted());
assertEquals(resultReceived_TESTFUNCTION1, functionStats.getResultsReceived());
functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION5, iDS);
assertEquals(noOfExecutionCalls_TESTFUNCTION5, functionStats.getFunctionExecutionCalls());
assertEquals(noOfExecutionsCompleted_TESTFUNCTION5, functionStats.getFunctionExecutionsCompleted());
assertEquals(resultReceived_TESTFUNCTION5, functionStats.getResultsReceived());
return Boolean.TRUE;
}
};
client.invoke(checkStatsOnClient);
SerializableCallable checkStatsOnServer = new SerializableCallable("checkStatsOnClient") {
public Object call() throws Exception {
// checks for the aggregate stats
InternalDistributedSystem iDS = (InternalDistributedSystem) cache.getDistributedSystem();
FunctionServiceStats functionServiceStats = iDS.getFunctionServiceStats();
waitNoFunctionsRunning(functionServiceStats);
// functions are executed 2 times
noOfExecutionCalls_Aggregate += 2;
assertEquals(noOfExecutionCalls_Aggregate, functionServiceStats.getFunctionExecutionCalls());
noOfExecutionsCompleted_Aggregate += 2;
// before giving up
for (int i = 0; i < 10; i++) {
try {
assertEquals(noOfExecutionsCompleted_Aggregate, functionServiceStats.getFunctionExecutionsCompleted());
} catch (RuntimeException r) {
if (i == 9) {
throw r;
}
try {
Thread.sleep(1000);
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
throw r;
}
}
}
FunctionStats functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION1, iDS);
// TEST_FUNCTION1 is executed once
noOfExecutionCalls_TESTFUNCTION1 += 1;
assertEquals(noOfExecutionCalls_TESTFUNCTION1, functionStats.getFunctionExecutionCalls());
noOfExecutionsCompleted_TESTFUNCTION1 += 1;
assertEquals(noOfExecutionsCompleted_TESTFUNCTION1, functionStats.getFunctionExecutionsCompleted());
functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION5, iDS);
// TEST_FUNCTION5 is executed once
noOfExecutionCalls_TESTFUNCTION5 += 1;
assertEquals(noOfExecutionCalls_TESTFUNCTION5, functionStats.getFunctionExecutionCalls());
noOfExecutionsCompleted_TESTFUNCTION5 += 1;
assertEquals(noOfExecutionsCompleted_TESTFUNCTION5, functionStats.getFunctionExecutionsCompleted());
return Boolean.TRUE;
}
};
server1.invoke(checkStatsOnServer);
server2.invoke(checkStatsOnServer);
server3.invoke(checkStatsOnServer);
}
use of org.apache.geode.test.dunit.SerializableCallable in project geode by apache.
the class FunctionServiceStatsDUnitTest method testClientServerDistributedRegionFunctionExecutionStats.
/**
* 1-client 3-Servers server1 : Replicate server2 : Replicate server3 : Replicate client : Empty
* Function : TEST_FUNCTION2 Execution of the function on serverRegion with set multiple keys as
* the routing object and using the name of the function
*
* On server side, function execution calls should be equal to the no of function executions
* completed.
*/
@Test
public void testClientServerDistributedRegionFunctionExecutionStats() {
final String regionName = "FunctionServiceStatsDUnitTest";
SerializableCallable createCahenServer = new SerializableCallable("createCahenServer") {
public Object call() throws Exception {
try {
Properties props = new Properties();
DistributedSystem ds = getSystem(props);
assertNotNull(ds);
ds.disconnect();
ds = getSystem(props);
cache = CacheFactory.create(ds);
LogWriterUtils.getLogWriter().info("Created Cache on Server");
assertNotNull(cache);
AttributesFactory factory = new AttributesFactory();
factory.setScope(Scope.DISTRIBUTED_ACK);
factory.setDataPolicy(DataPolicy.REPLICATE);
assertNotNull(cache);
Region region = cache.createRegion(regionName, factory.create());
LogWriterUtils.getLogWriter().info("Region Created :" + region);
assertNotNull(region);
for (int i = 1; i <= 200; i++) {
region.put("execKey-" + i, new Integer(i));
}
CacheServer server = cache.addCacheServer();
assertNotNull(server);
int port = AvailablePort.getRandomAvailablePort(AvailablePort.SOCKET);
server.setPort(port);
try {
server.start();
} catch (IOException e) {
Assert.fail("Failed to start the Server", e);
}
assertTrue(server.isRunning());
return new Integer(server.getPort());
} catch (Exception e) {
Assert.fail("FunctionServiceStatsDUnitTest#createCache() Failed while creating the cache", e);
throw e;
}
}
};
final Integer port1 = (Integer) server1.invoke(createCahenServer);
final Integer port2 = (Integer) server2.invoke(createCahenServer);
final Integer port3 = (Integer) server3.invoke(createCahenServer);
SerializableCallable createCaheInClient = new SerializableCallable("createCaheInClient") {
public Object call() throws Exception {
try {
Properties props = new Properties();
props.put(MCAST_PORT, "0");
props.put(LOCATORS, "");
DistributedSystem ds = getSystem(props);
assertNotNull(ds);
ds.disconnect();
ds = getSystem(props);
cache = CacheFactory.create(ds);
LogWriterUtils.getLogWriter().info("Created Cache on Client");
assertNotNull(cache);
CacheServerTestUtil.disableShufflingOfEndpoints();
Pool p;
try {
p = PoolManager.createFactory().addServer("localhost", port1.intValue()).addServer("localhost", port2.intValue()).addServer("localhost", port3.intValue()).setPingInterval(250).setSubscriptionEnabled(false).setSubscriptionRedundancy(-1).setReadTimeout(2000).setSocketBufferSize(1000).setMinConnections(6).setMaxConnections(10).setRetryAttempts(3).create("FunctionServiceStatsDUnitTest_pool");
} finally {
CacheServerTestUtil.enableShufflingOfEndpoints();
}
AttributesFactory factory = new AttributesFactory();
factory.setScope(Scope.LOCAL);
factory.setDataPolicy(DataPolicy.EMPTY);
factory.setPoolName(p.getName());
assertNotNull(cache);
Region region = cache.createRegion(regionName, factory.create());
LogWriterUtils.getLogWriter().info("Client Region Created :" + region);
assertNotNull(region);
for (int i = 1; i <= 200; i++) {
region.put("execKey-" + i, new Integer(i));
}
return Boolean.TRUE;
} catch (Exception e) {
Assert.fail("FunctionServiceStatsDUnitTest#createCache() Failed while creating the cache", e);
throw e;
}
}
};
client.invoke(createCaheInClient);
client.invoke(initializeStats);
server1.invoke(initializeStats);
server2.invoke(initializeStats);
server3.invoke(initializeStats);
Function function = new TestFunction(true, TestFunction.TEST_FUNCTION2);
registerFunctionAtServer(function);
function = new TestFunction(true, TestFunction.TEST_FUNCTION3);
registerFunctionAtServer(function);
SerializableCallable ExecuteFunctions = new SerializableCallable("PopulateRegionAndExecuteFunctions") {
public Object call() throws Exception {
Function function2 = new TestFunction(true, TestFunction.TEST_FUNCTION2);
FunctionService.registerFunction(function2);
Function function3 = new TestFunction(true, TestFunction.TEST_FUNCTION3);
FunctionService.registerFunction(function3);
Region region = cache.getRegion(regionName);
Set filter = new HashSet();
for (int i = 100; i < 120; i++) {
filter.add("execKey-" + i);
}
try {
noOfExecutionCalls_Aggregate++;
noOfExecutionCalls_TESTFUNCTION2++;
List list = (List) FunctionService.onRegion(region).withFilter(filter).execute(function2).getResult();
noOfExecutionsCompleted_Aggregate++;
noOfExecutionsCompleted_TESTFUNCTION2++;
int size = list.size();
resultReceived_Aggregate += size;
resultReceived_TESTFUNCTION2 += size;
noOfExecutionCalls_Aggregate++;
noOfExecutionCalls_TESTFUNCTION2++;
list = (List) FunctionService.onRegion(region).withFilter(filter).execute(function2).getResult();
noOfExecutionsCompleted_Aggregate++;
noOfExecutionsCompleted_TESTFUNCTION2++;
size = list.size();
resultReceived_Aggregate += size;
resultReceived_TESTFUNCTION2 += size;
return Boolean.TRUE;
} catch (FunctionException e) {
e.printStackTrace();
Assert.fail("test failed due to", e);
throw e;
} catch (Exception e) {
e.printStackTrace();
Assert.fail("test failed due to", e);
throw e;
}
}
};
client.invoke(ExecuteFunctions);
SerializableCallable checkStatsOnClient = new SerializableCallable("checkStatsOnClient") {
public Object call() throws Exception {
// checks for the aggregate stats
InternalDistributedSystem iDS = (InternalDistributedSystem) cache.getDistributedSystem();
FunctionServiceStats functionServiceStats = iDS.getFunctionServiceStats();
waitNoFunctionsRunning(functionServiceStats);
assertEquals(noOfExecutionCalls_Aggregate, functionServiceStats.getFunctionExecutionCalls());
assertEquals(noOfExecutionsCompleted_Aggregate, functionServiceStats.getFunctionExecutionsCompleted());
assertEquals(resultReceived_Aggregate, functionServiceStats.getResultsReceived());
FunctionStats functionStats = FunctionStats.getFunctionStats(TestFunction.TEST_FUNCTION2, iDS);
assertEquals(noOfExecutionCalls_TESTFUNCTION2, functionStats.getFunctionExecutionCalls());
assertEquals(noOfExecutionsCompleted_TESTFUNCTION2, functionStats.getFunctionExecutionsCompleted());
assertEquals(resultReceived_TESTFUNCTION2, functionStats.getResultsReceived());
return Boolean.TRUE;
}
};
client.invoke(checkStatsOnClient);
}
use of org.apache.geode.test.dunit.SerializableCallable in project geode by apache.
the class FunctionServiceStatsDUnitTest method testP2PDummyExecutionStats.
@Test
public void testP2PDummyExecutionStats() throws Exception {
Host host = Host.getHost(0);
final VM datastore0 = host.getVM(0);
final VM datastore1 = host.getVM(1);
final VM datastore2 = host.getVM(2);
final VM accessor = host.getVM(3);
SerializableCallable closeDistributedSystem = new SerializableCallable("closeDistributedSystem") {
public Object call() throws Exception {
if (getCache() != null && !getCache().isClosed()) {
getCache().close();
getCache().getDistributedSystem().disconnect();
}
return Boolean.TRUE;
}
};
accessor.invoke(closeDistributedSystem);
datastore0.invoke(closeDistributedSystem);
datastore1.invoke(closeDistributedSystem);
datastore2.invoke(closeDistributedSystem);
}
use of org.apache.geode.test.dunit.SerializableCallable in project geode by apache.
the class OnGroupsFunctionExecutionDUnitTest method testStreamingClientServerFunction.
@Test
public void testStreamingClientServerFunction() {
Host host = Host.getHost(0);
VM server0 = host.getVM(0);
VM server1 = host.getVM(1);
VM server2 = host.getVM(2);
VM client = host.getVM(3);
VM locator = Host.getLocator();
final String regionName = getName();
initVM(server0, "mg,g0", regionName, true);
initVM(server1, "g1", regionName, true);
initVM(server2, "g0,g1", regionName, true);
final int locatorPort = getLocatorPort(locator);
final String hostName = host.getHostName();
client.invoke(new SerializableCallable() {
@Override
public Object call() throws Exception {
try {
Cache c = CacheFactory.getAnyInstance();
c.close();
} catch (CacheClosedException cce) {
}
disconnectFromDS();
LogWriterUtils.getLogWriter().fine("SWAP:creating client cache");
ClientCacheFactory ccf = new ClientCacheFactory();
ccf.addPoolLocator(hostName, locatorPort);
ccf.setPoolServerGroup("mg");
ccf.set(LOG_LEVEL, LogWriterUtils.getDUnitLogLevel());
ClientCache c = ccf.create();
c.getLogger().info("SWAP:invoking function from client on g0");
Execution e = InternalFunctionService.onServers(c, "g0");
ArrayList<Integer> l = (ArrayList<Integer>) e.execute(new OnGroupMultiResultFunction()).getResult();
int sum = 0;
for (int i = 0; i < l.size(); i++) {
sum += l.get(i);
}
assertEquals(10, sum);
return null;
}
});
client.invoke(new SerializableCallable() {
@Override
public Object call() throws Exception {
ClientCache c = ClientCacheFactory.getAnyInstance();
c.getLogger().fine("SWAP:invoking function from client on mg");
Execution e = InternalFunctionService.onServers(c, "mg");
ArrayList<Integer> l = (ArrayList<Integer>) e.execute(new OnGroupMultiResultFunction()).getResult();
int sum = 0;
for (int i = 0; i < l.size(); i++) {
sum += l.get(i);
}
assertEquals(5, sum);
return null;
}
});
client.invoke(new SerializableCallable() {
@Override
public Object call() throws Exception {
ClientCache c = ClientCacheFactory.getAnyInstance();
c.getLogger().fine("SWAP:invoking function from client on g0 g1");
Execution e = InternalFunctionService.onServers(c, "g0", "g1");
ArrayList<Integer> l = (ArrayList<Integer>) e.execute(new OnGroupMultiResultFunction()).getResult();
int sum = 0;
for (int i = 0; i < l.size(); i++) {
sum += l.get(i);
}
assertEquals(15, sum);
return null;
}
});
}
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