#Component
public class RefValidator implements Component {
#Autowired
private Repository repository;
public void validate(Context context) {
Txn txn = context.getTxn();
if (Objects.nonNull(txn) && !StringUtils.isEmpty(txn.getReferenceNumber())){
if(txn.getId() == 0){
boolean isRealmIdAndReferenceNumberExists = repository.isRefNumberExistsInSale(txn.getRealmId(), txn.getReferenceNumber());
if(isRealmIdAndReferenceNumberExists){
throw new Exception();
}
}
}
}
}
I have a class as above and want to test it using mockito. I am doing #INjectMock for RefValidator and #Mock on Repository but when I do
Mockito
.when(repository.isRefNumberExistsInSale(Mockito.anyString(),Mockito.anyString()))
.thenReturn(true);
thenReturn doesn't return true.
It's kinda hard to define what's the problem because you haven't provided your test class. But it looks like your annotations are not being processed while running a test suit.
Try one of the following:
Add #RunWith(MockitoJUnitRunner.class) above your test class
Add MockitoAnnotations.initMocks(this); inside setup method (which is annotated with #Before)
See the 2nd section of this article for help.
Related
Unit test noob here.
I have three classes: Db1Dao, Db2Dao, ExecuteClass where Db1Dao, Db2Dao are database access objects for two different databases. My goal is to fetch some data from db1 using Db1Dao and run executeClass.execute() to "put" the processed data into db2 using Db2Dao.
My ExecuteClass looks like this:
class ExecuteClass {
private Db1Dao db1Dao;
private Db2Dao db2Dao;
public void execute() {
...
List<String> listOfString = getExternalData(someParam);
List<Metadata> metadatum = db1Dao.get(someInputs);
... I do something to generate a list of new class `A` based on listOfString & metadatum ...
try {
db2Dao.put(listOfA);
} catch (PutException e){
...
}
}
public List<String> getExternalData(SomeClass someParam){
... do something
return listOfString;
}
}
Now I want to test:
Given a specific listOfString (returned by getExternalData) and a specific metadatum (returned by db1Dao.get):
Will I get the desired listOfA?
Am I able to call db2Dao.put and its input parameter is listOfA?
Particularly, I have hard-coded sample listOfString and metadatum and desired listOfA (and they will be passed via an object MockData, see the following code) but I don't know how to write the test using Mockito. The following is a test class I wrote but it does not work:
class TestClass extends BaseTest {
#Mock
private Db1Dao db1Dao;
#Mock
private Db2Dao db2Dao;
private ExecuteClass executeClass;
#BeforeEach
public void setUp() {
MockitoAnnotations.initMocks(this);
executeClass = new ExecuteClass(db1Dao, db2Dao);
}
#ParameterizedTest
#MethodSource("MockDataProvider")
public void executeClassTest(final MockData mockData) throws PutException {
Mockito.when(db1Dao.get(Mockito.any(), ...))
.thenReturn(mockData.getMetadatum());
ExecuteClass executeClassSpy = Mockito.spy(executeClass);
Mockito.when(executeClassSpy.getExternalData(Mockito.any()))
.thenReturn(mockData.getListOfString());
executeClassSpy.execute();
// executeClass.execute(); not working neither...
List<A> listOfA = mockData.getDesiredListOfA();
Mockito.verify(db2Dao).put(listOfA);
}
}
Could anyone please let me know? Thank you in advance!!
You should not create a spy of the same class you want to test. Instead, try to write a unit test for the smallest amount of code (e.g. a public method) and mock every external operator (in your case Db1Dao and Db2Dao).
If testing a public method involves calling another public method of the same class, make sure to mock everything inside the other public method (in your case getExternalData). Otherwise, this other public method might be a good candidate for an extra class to have clear separation of concerns.
So, remove the ExecuteClass executeClassSpy = Mockito.spy(executeClass); and make sure you setup everything with Mockito what's called within getExternalData.
To now actually, verify that Db2Dao was called with the correct parameter, either use your current approach with verifying the payload. But here it's important to 100% create the same data structure you get while executing your application code.
Another solution would be to use Mockito's #Captor. This allows you to capture the value of why verifying the invocation of a mock. Later on, you can also write assertions on the captured value:
#Captor
private ArgumentCaptor<ClassOfListOfA> argumentCaptor;
#Test
public void yourTest() {
Mockito.verify(db2Dao).put(argumentCaptor.capture());
assertEquals("StringValue", argumentCaptur.getValue().getWhateverGetterYouHave);
}
The following code worked for me.
I partially accepted #rieckpil's answer. I used #Captor which is very handy.
The reason I had to mock getExternalData() is because its implementation is still a "TODO".
class TestClass extends BaseTest {
#Mock
private Db1Dao db1Dao;
#Mock
private Db2Dao db2Dao;
#Captor
private ArgumentCaptor<List<A>> argumentCaptor;
private ExecuteClass executeClass;
#BeforeEach
public void setUp() {
MockitoAnnotations.initMocks(this);
executeClass = new ExecuteClass(db1Dao, db2Dao);
}
#ParameterizedTest
#MethodSource("MockDataProvider")
public void executeClassTest(final MockData mockData) throws PutException {
Mockito.when(db1Dao.get(Mockito.any(), ...))
.thenReturn(mockData.getMetadatum());
ExecuteClass executeClassSpy = Mockito.spy(executeClass);
Mockito.when(executeClassSpy.getExternalData(Mockito.any()))
.thenReturn(mockData.getListOfString());
executeClassSpy.execute();
List<A> listOfA = mockData.getDesiredListOfA();
Mockito.verify(db2Dao).put(argumentCaptor.capture());
assertEquals(listOfA, argumentCaptor.getValue());
}
}
I've been trying to setup some unit tests to verify the logic in a ForeachWriter custom implementation but am running into a bit of mocking / duplication trouble.
I'd like to Mock an injected dependency in the ForeachWriter, but my mocks seem to be duplicated during execution. Originally I thought the mocked dependencies weren't getting called, but during debug inspection I've found that multiple versions of them seem to exist (based on hashCode).
Here's some quick sample code of what I've been trying to do:
//Class I'd like to test
public class TestForeachSink extends ForeachWriter<String> {
#Inject
SomeDependency dep;
public TestForeachSink(SomeDependency dep) {
this.dep = dep;
}
#Override
public boolean open(long partitionId, long version) {
dep.doSomethingStartupRelatedOrThrow();
return true;
}
#Override
public void process(String value) {
dep.processSomething(value);
}
#Override
public void close(Throwable errorOrNull) {
dep.closeConnections();
}
}
//Testing Class
public class TestForeachSinkTests {
#Mock SomeDependency _dep;
TestForeachSink target;
#BeforeEach
public void init() {
_dep = mock(SomeDependency.class, withSettings().serializable());
target = new TestForeachSink(_dep);
}
#Test
pubic void shouldVerifyDependencyInteractions() {
//setup stream, add data to it
stream.toDS().writeStream().foreach(target).start().processAllAvailable();
//VERIFY INTERACTIONS WITH MOCK HERE
}
}
The added data runs through the stream as expected but it seems like the mock I've passed in of SomeDependency is replaced during execution with a copy. I think that makes sense if the execution is running as though it were performing on a separate worker, but I'd still like to be able to test the ForeachWriter.
Is anyone else testing this part of the code? I haven't come across any other tests for ForeachSink custom implementations but direction on moving forward would be very appreciated!
How to mock "System.getenv("...")" in JUnit.
Currently I am doing:
#RunWith(Parameterized.class)
#PowerMockRunnerDelegate(PowerMockRunner.class)
#PrepareForTest(System.class)
public class TestClass extends BaseTest {
public TestClass(String testCase) {
this.testCase = testCase;
}
#Before
#Override
public final void initTable() throws Throwable {
super.initTable();
PowerMockito.mockStatic(System.class);
PowerMockito.when(System.getenv("ENV_VAR1")).thenReturn("1234");
}
...
}
I am using both PowerMock and Parameterizedrunner.
I am getting below exception for line:
PowerMockito.when(System.getenv("ENV_VAR1")).thenReturn("1234");
Exception:
org.mockito.exceptions.base.MockitoException:
'afterPropertiesSet' is a *void method* and it *cannot* be stubbed with a *return value*!
Voids are usually stubbed with Throwables:
doThrow(exception).when(mock).someVoidMethod();
***
Use the #RunWith(PowerMockRunner.class) annotation at the class-level of the test case.
Use the #PrepareForTest({ClassThatCallsTheSystemClass.class}) annotation at the class-level of the test case.
Example with using EasyMock
public class SystemClassUser {
public String performEncode() throws UnsupportedEncodingException {
return URLEncoder.encode("string", "enc");
}
}
And test
#RunWith(PowerMockRunner.class)
#PrepareForTest( { SystemClassUser.class })
public class SystemClassUserTest {
#Test
public void assertThatMockingOfNonFinalSystemClassesWorks() throws Exception {
mockStatic(URLEncoder.class);
expect(URLEncoder.encode("string", "enc")).andReturn("something");
replayAll();
assertEquals("something", new SystemClassUser().performEncode());
verifyAll();
}
}
From:
https://github.com/powermock/powermock/wiki/MockSystem
So, you should add a class that uses the System.getenv, not the System class to #PrepareForTest.
This post explains why it should be done in such way.
Also, I'd like to recommend to use the System Rules library for your case. It has a good way to stub environment variables. PowerMock modifies a class byte code, so it makes test slowly. And even if it not modify a class it at least read class from disk.
How to bind mock of final class in Jukito ?
For example :
public final class SomeFinalClass(){
public SomeFinalClass(String someString){
}
}
//Testing class
#Runwith(JukitoRunner.class)
public class TestingClass(){
#Inject
private SomeFinalClass someFinalClassMock;
public static class TestModule extends JukitoModule {
#Override
protected void configureTest() {
// bind(SomeClient.class).in(TestSingleton.class);
}
#Provides
public SomeFinalClass getSomkeFinalClass() {
return Mokito.mock(SomeFinalClass.class); //throws error
}
}
}
Is there a way i can use PowerMockito with JukitoRunner ?
You can mock a final class if you're using Mockito 2. From Mockito 2 Wiki:
Mocking of final classes and methods is an incubating, opt-in feature. It uses a combination of Java agent instrumentation and subclassing in order to enable mockability of these types. As this works differently to our current mechanism and this one has different limitations and as we want to gather experience and user feedback, this feature had to be explicitly activated to be available ; it can be done via the mockito extension mechanism by creating the file src/test/resources/mockito-extensions/org.mockito.plugins.MockMaker containing a single line: mock-maker-inline.
After you created this file, Mockito will automatically use this new engine and one can do :
final class FinalClass {
final String finalMethod() { return "something"; }
}
FinalClass concrete = new FinalClass();
FinalClass mock = mock(FinalClass.class);
given(mock.finalMethod()).willReturn("not anymore");
assertThat(mock.finalMethod()).isNotEqualTo(concrete.finalMethod());
Does anyone have idea about writing unit test case for ATG using Mockito? I came across following discussions while goggling -
Automated unit tests for ATG development and
Using PowerMock to obtain the ATG Nucleus in testing results in NPE
But need a help in setting up Nucleus and other dependencies (DAS, DPS, DSS etc.) and a sample test class for droplet using Mockito.
We are using ATG Dust where we have to set all the dependencies. I am wondering if we can replace ATG Dust completely with Mockito. Here is the example how we are writing the test cases -
A Base class for setting Nucleus -
package com.ebiz.market.support;
import java.io.File;
import java.util.Arrays;
import atg.nucleus.NucleusTestUtils;
import atg.test.AtgDustCase;
import atg.test.util.FileUtil;
public class BaseTestCase extends AtgDustCase {
public atg.nucleus.Nucleus mNucleus = null;
private final String ATGHOME="C://ATG/ATG9.4//home";
private final String ATGHOMEPROPERTY = "atg.dynamo.home";
protected void setUp() throws Exception {
super.setUp();
String dynamoHome = System.getProperty(ATGHOMEPROPERTY);
if(dynamoHome == null)
System.setProperty(ATGHOMEPROPERTY, ATGHOME);
File configpath = NucleusTestUtils.getConfigpath(this.getClass(), this.getClass().getName(), true);
FileUtil.copyDirectory("src/test/resources/config/test/", configpath.getAbsolutePath(), Arrays.asList(new String [] {".svn"}));
copyConfigurationFiles(new String[]{"config"}, configpath.getAbsolutePath(), ".svn");
}
public File getConfigPath() {
return NucleusTestUtils.getConfigpath(this.getClass(), this.getClass().getName(), true);
}
}
Writing the test case by extending the base class -
public class BizDropletTest extends BaseTestCase {
private BizDroplet bizDroplet;
#Before
public void setUp() throws Exception {
super.setUp();
mNucleus = NucleusTestUtils.startNucleusWithModules(new String[] { "DSS", "DPS", "DAFEAR" }, this.getClass(),
this.getClass().getName(), "com/ebiz/market/support/droplet/BizDroplet");
autoSuggestDroplet = (AutoSuggestDroplet) mNucleus.resolveName("com/ebiz/market/support/droplet/BizDroplet");
try {
bizDroplet.doStartService();
} catch (ServiceException e) {
fail(e.getMessage());
}
}
/**
Other methods
*/
}
So, how Mockito can handle these? Again, for me the target is to replace ATG Dust with Mockito completely because ATG Dust take lot of time in running tests due to huge dependencies.
Thanks.
Using Mockito you don't setup Nucleus or other dependencies (unless you need it). You simply mock the objects that you need to use.
Consider a simple class ProductUrlDroplet that retrieves a product from the repository and then outputs a url based on this. The service method would look something like this:
public void service(DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) throws ServletException, IOException {
Object product = pRequest.getObjectParameter(PRODUCT_ID);
RepositoryItem productItem = (RepositoryItem) product;
String generatedUrl = generateProductUrl(pRequest, productItem.getRepositoryId());
pRequest.setParameter(PRODUCT_URL_ID, generatedUrl);
pRequest.serviceParameter(OPARAM_OUTPUT, pRequest, pResponse);
}
private String generateProductUrl(DynamoHttpServletRequest request, String productId) {
HttpServletRequest originatingRequest = (HttpServletRequest) request.resolveName("/OriginatingRequest");
String contextroot = originatingRequest.getContextPath();
return contextroot + "/browse/product.jsp?productId=" + productId;
}
A simple test class for this will then be:
public class ProductUrlDropletTest {
#InjectMocks private ProductUrlDroplet testObj;
#Mock private DynamoHttpServletRequest requestMock;
#Mock private DynamoHttpServletResponse responseMock;
#Mock private RepositoryItem productRepositoryItemMock;
#BeforeMethod(groups = { "unit" })
public void setup() throws Exception {
testObj = new ProductUrlDroplet();
MockitoAnnotations.initMocks(this);
Mockito.when(productRepositoryItemMock.getRepositoryId()).thenReturn("50302372");
}
#Test(groups = { "unit" })
public void testProductURL() throws Exception {
Mockito.when(requestMock.getObjectParameter(ProductUrlDroplet.PRODUCT_ID)).thenReturn(productRepositoryItemMock);
testObj.service(requestMock, responseMock);
ArgumentCaptor<String> argumentProductURL = ArgumentCaptor.forClass(String.class);
Mockito.verify(requestMock).setParameter(Matchers.eq(ProductUrlDroplet.PRODUCT_URL_ID), argumentProductURL.capture());
Assert.assertTrue(argumentProductURL.getValue().equals("/browse/product.jsp?productId=50302372"));
}
}
The key components are that you need to initialise the class you want to test (testObj). You then simply construct the response for each of the input parameters of the objects you are going to use (in this case productRepositoryItemMock represents the RepositoryItem and productRepositoryItemMock.getRepositoryId() returns a String that you can then test against later).
You will also notice that this test only validates the service method and not the individual methods. How you do it is up to you but generally I've been focused on testing my service and handleXXX methods in the formhandlers and droplets.
Testing the XXXManager, XXXUtil and XXXService classes will all have their own tests and should be 'mocked' into the droplets and formhandlers. For these I would write tests for each method though.
PowerMockito only really comes into the picture when you need to mock static methods and classes and the documentation does enough to explain that.