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Getting a nullpointer exception when using when().thenreturn() in mockito

I have a mockito junit's test using the command below. The variable serviceTask is an Interface's instancie called ServiceTask. I'm using a #Mock in the declarection
Declaraction:
#Mock
private ServiceTask
Command Line:
Mockito.when(serviceTask.getTask(Mockito.anyLong())).thenReturn(new Task());
Stack Trace:
java.lang.NullPointerException at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:508) at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.mockito.internal.runners.DefaultInternalRunner$1$1.evaluate(DefaultInternalRunner.java:54)
at
org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
at org.junit.rules.RunRules.evaluate(RunRules.java:20) at
org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at
org.junit.runners.ParentRunner.run(ParentRunner.java:363) at
org.mockito.internal.runners.DefaultInternalRunner$1.run(DefaultInternalRunner.java:99)
at
org.mockito.internal.runners.DefaultInternalRunner.run(DefaultInternalRunner.java:105)
at
org.mockito.internal.runners.StrictRunner.run(StrictRunner.java:40)
at
org.mockito.junit.MockitoJUnitRunner.run(MockitoJUnitRunner.java:163)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)

The only reason for NPE if it happens at the line of code you mentioned above is serviceTask is null.
If you're not using the correct test runner which can help you to initialise the mock instance, then you can actually initialise them manually in your setUp method by using MockitoAnnotations.initMocks(this);
But if you already did so or used the correct test runner, then probably you linked to a wrong line of code. Try to debug yourself again.
Your stack trace doesn't look like it caused from your linked line of code.

How do I lazily-load a collection from a service method?

I'm using Hibernate 5.1.3.Final with Spring 5.1. I'm having trouble loading a lazily-loaded collection. In my entity I have
#OneToMany(fetch = FetchType.LAZY)
#JoinTable(name = "sb_product_object", joinColumns = { #JoinColumn(name = "PRODUCT_ID") }, inverseJoinColumns = { #JoinColumn(name = "MY_OBJECT_ID") })
private List<MyObject> myObjects;
Then I have a service method where I load the objects
#Override
#Transactional
public List<MyObject> getMyObjectsByProduct(final String productId)
{
final Product product = productService.findById(productId);
return product.getMyObjects();
}
but when I try and iterate over the objects,
final List<MyObject> ret = m_myobjectsvc.getMyObjectsByProduct(productId);
for (final MyObject assmt : ret)
I get this error ...
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.mainco.subco.ecom.domain.Product.myObjects, could not initialize proxy - no Session
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:582)
at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:201)
at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:561)
at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:132)
at org.hibernate.collection.internal.PersistentBag.iterator(PersistentBag.java:277)
at org.mainco.subco.MyObject.mvc.MyObjectViewControllerIT.testSetDisplayTABIcon(MyObjectViewControllerIT.java:87)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:539)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:761)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:461)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:207)
How do I lazily load a collection from my service method?

In your situation, if you always iterate your collection,
so i think you should avoid to use the lazy load because it causes N+1 problems and might impact to your performance.
Advanced solution: you should use "entity graph" in jpa 2.2, to load what you need.
For simply solution, just make sure collections is loaded by calling collections.size() in the same transaction.
No transaction anti pattern may be quite dangerous in my opinion. So avoid to use

Create session on enable Hibernate property enable_lazy_load_no_trans
<property name="hibernate.enable_lazy_load_no_trans" value="true"/>
https://vladmihalcea.com/the-hibernate-enable_lazy_load_no_trans-anti-pattern/

Transient mode for unit tests with jclouds and Openstack Swift doesn't work

I just migrated to jclouds 2.0.0 (it was suppose to some of the problems with not repeatable operations and it did). Here are the dependencies
<dependency>
<groupId>org.apache.jclouds.driver</groupId>
<artifactId>jclouds-slf4j</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.jclouds.api</groupId>
<artifactId>openstack-keystone</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.jclouds.api</groupId>
<artifactId>openstack-swift</artifactId>
<version>2.0.0</version>
</dependency>
I want to have unit tests for my code. But when I use transient as a provider:
SwiftApi swiftApi = ContextBuilder.newBuilder("transient")
.endpoint(endpoint)
.credentials(user, password)
.modules(modules)
.overrides(overrides)
.buildApi(SwiftApi.class);
I get this exception:
com.google.inject.ConfigurationException: Guice configuration errors:
1) No implementation for org.jclouds.openstack.swift.v1.SwiftApi was bound.
while locating org.jclouds.openstack.swift.v1.SwiftApi
1 error
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:1004)
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1009)
at org.jclouds.ContextBuilder.buildApi(ContextBuilder.java:651)
at org.jclouds.ContextBuilder.buildApi(ContextBuilder.java:643)
at eu.europeana.cloud.service.mcs.persistent.swift.SimpleSwiftConnectionProvider.openConnections(SimpleSwiftConnectionProvider.java:91)
at eu.europeana.cloud.service.mcs.persistent.swift.SimpleSwiftConnectionProvider.<init>(SimpleSwiftConnectionProvider.java:67)
at eu.europeana.cloud.service.mcs.persistent.swift.SimpleSwiftConnectionProviderTest.getContainer(SimpleSwiftConnectionProviderTest.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
The same code run with openstack-swift as provider (and correct credentials and endpoint) works just fine.
Passing any other string as newBuilder function parameter cause:
java.util.NoSuchElementException: key [wrongstring] not in the list of providers or apis: {apis=[openstack-keystone, openstack-swift, transient]}
at org.jclouds.ContextBuilder.newBuilder(ContextBuilder.java:175)
which made me think that transient should be supported. But how to make it work?

You can't create a SwiftApi view of a transient blobstore; instead you must use the portable BlobStore view:
String provider = ...; // openstack-swift or transient
BlobStoreContext context = ContextBuilder.newBuilder(provider)
.endpoint(endpoint)
.credentials(user, password)
.buildApi(BlobStoreContext.class);
BlobStore blobStore = context.getBlobStore();
// interact with blobStore, e.g., get, put
...
context.close();

Java Mocking FTP Session

I have an application that deals with ftp server, now I want to write some test, but I got trouble in the beginning, I am trying to mock the session factory but it throws exception and could not understand why, here is my code:
#Mock
SessionFactory<FTPFile> sessionFactory;
#Before
public void initMocks() {
MockitoAnnotations.initMocks(this);
DefaultFtpSessionFactory sf = new DefaultFtpSessionFactory();
sf.setHost(host);
sf.setPort(port);
sf.setUsername(username);
sf.setPassword(password);
Mockito.when(sessionFactory.getSession()).thenReturn((Session<FTPFile>) new CachingSessionFactory<FTPFile>(sf));
}
and here is the exception I got:
java.lang.IllegalArgumentException: [Assertion failed] - this String argument must have text; it must not be null, empty, or blank
at org.springframework.util.Assert.hasText(Assert.java:168)
at org.springframework.util.Assert.hasText(Assert.java:181)
at org.springframework.integration.ftp.session.AbstractFtpSessionFactory.setHost(AbstractFtpSessionFactory.java:101)
at com.melita.maltapay.schedule._ScheduledTasks.initMocks(_ScheduledTasks.java:48)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Can someone tell me where I did it wrong? :/

If you are looking to test your FtpClient you could use MockFtpServer is very simple to configure and use in tests.
The MockFtpServer project provides mock/dummy FTP server
implementations that can be very useful for testing of FTP client
code. Two FTP Server implementations are provided, each at a different
level of abstraction.

Integrate Hibernate 5.2 with Spring framework 4.x

I am using latest stable Spring version (4.2.6.RELEASE).
After upgrading Hibernate from 5.1 to 5.2 and changing hibernate-entitymanager dependency to hibernate-core due hibernate documentation: https://github.com/hibernate/hibernate-orm/wiki/Migration-Guide---5.2
I dont receive any compile error but all my tests fails with this stack trace:
Jun 06, 2016 12:00:38 PM org.springframework.test.context.TestContextManager beforeTestMethod
WARNING: Caught exception while allowing TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener#548b7f67] to process 'before' execution of test method [public void com.rh.cores.architecture.tests.units.person.PersonTest.add_iranianNaturalPersonDateIsInvalid_preventSaving()] for test instance [com.rh.cores.architecture.tests.units.person.PersonTest#7f9e8421]
org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is java.lang.NoSuchMethodError: org.hibernate.Session.getFlushMode()Lorg/hibernate/FlushMode;
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
at org.springframework.test.context.transaction.TransactionContext.startTransaction(TransactionContext.java:98)
at org.springframework.test.context.transaction.TransactionalTestExecutionListener.beforeTestMethod(TransactionalTestExecutionListener.java:200)
at org.springframework.test.context.TestContextManager.beforeTestMethod(TestContextManager.java:265)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: java.lang.NoSuchMethodError: org.hibernate.Session.getFlushMode()Lorg/hibernate/FlushMode;
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.prepareFlushMode(HibernateJpaDialect.java:187)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:173)
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380)
... 30 more
Jun 06, 2016 12:00:38 PM org.springframework.jdbc.datasource.init.ScriptUtils executeSqlScript
INFO: Executing SQL script from class path resource [test/downs/architecture/down.sql]
Jun 06, 2016 12:00:38 PM org.springframework.jdbc.datasource.init.ScriptUtils executeSqlScript
INFO: Executed SQL script from class path resource [test/downs/architecture/down.sql] in 5 ms.
org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is java.lang.NoSuchMethodError: org.hibernate.Session.getFlushMode()Lorg/hibernate/FlushMode;
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
at org.springframework.test.context.transaction.TransactionContext.startTransaction(TransactionContext.java:98)
at org.springframework.test.context.transaction.TransactionalTestExecutionListener.beforeTestMethod(TransactionalTestExecutionListener.java:200)
at org.springframework.test.context.TestContextManager.beforeTestMethod(TestContextManager.java:265)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: java.lang.NoSuchMethodError: org.hibernate.Session.getFlushMode()Lorg/hibernate/FlushMode;
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.prepareFlushMode(HibernateJpaDialect.java:187)
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:173)
at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380)
... 30 more

Hibernate 5.2 supports added in Spring framework 4.3 , that its stable version will be available in next week.
Spring 4.2 only supports Hibernate up to 5.1.
see this:
https://jira.spring.io/browse/SPR-14334

The issue is related to the versions only.
Use Hibernate version 5.1.0 with Spring 4.3.7. It will solve this issue.
Add the below dependency along with Spring framework dependencies of version 4.3.x .
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>`

methods are
applyFlushModeHint
protected boolean applyFlushModeHint(FlushMode flushMode)
Apply the FlushMode hint.
Parameters:
flushMode - The FlushMode value specified as hint
Returns:
true if the hint was "applied"
Where FlushMode can be
ALWAYS The Session is flushed before every query.
AUTO The Session is sometimes flushed before query execution in order to ensure that queries never return stale state.
COMMIT The Session is flushed when Transaction.commit() is called.
MANUAL The Session is only ever flushed when Session.flush() is explicitly called by the application.
NEVER Deprecated. use MANUAL instead.