How to mocking a void method with EasyMock?

How to mocking a void method with EasyMock?

Here, we’ve used the andAnswer (IAnswer) method to define the behavior of the populateTemperature () method when called. Then, we’ve used the EasyMock.getCurrentArguments () method – that returns the arguments passed to the mock method – to modify the locations passed.

How to create EasyMock expecting calls in Java?

Step 1: Create an interface CalculatorService to provide mathematical functions. File: CalculatorService.java Step 2: Create a JAVA class to represent MathApplication. File: MathApplication.java Let’s test the MathApplication class, by injecting in it a mock of calculatorService. Mock will be created by EasyMock. File: MathApplicationTester.java

What does The EasyMock getcurrentarguments method do?

Then, we’ve used the EasyMock.getCurrentArguments () method – that returns the arguments passed to the mock method – to modify the locations passed. Note that we have returned null at the end.

How does EasyMock check the number of calls?

EasyMock provides a special check on the number of calls that can be made on a particular method. Suppose MathApplication should call the CalculatorService.serviceUsed () method only once, then it should not be able to call CalculatorService.serviceUsed () more than once.

Can you use hashCode and hashCode In EasyMock?

It wasn’t tested. To be coherent with interface mocking, EasyMock provides a built-in behavior for equals (), toString (), hashCode () and finalize () even for class mocking. It means that you cannot record your own behavior for these methods. This limitation is considered to be a feature that prevents you from having to care about these methods.

Can you create a mock object In EasyMock?

We can use EasyMock to create mock objects and then inject them into the classes we want to test. However, EasyMock has certain limitations too. EasyMock can’t mock final and private methods. If these methods are called on mock object, then normal methods will get called.

How to check the Order of method calls In EasyMock?

On a Mock Object returned by a EasyMock.mock (), the order of method calls is not checked. If you would like a strict Mock Object that checks the order of method calls, use EasyMock. strict Mock () to create it. The equivalent annotation is @Mock (MockType.STRICT).

When to use hashCode for unequal objects in Java?

It is not required that if two objects are unequal according to the equals (java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Which is an example of mocking a void method?

An example of this is the Session.save () method. When we save a new entity, the save () method generates an id and sets it on the entity passed. For this reason, we have to mock the void method to simulate the various processing outcomes. Another time the mocking might come in handy is when testing exceptions thrown by the void method. 4.

Which is the expectlastcall method In EasyMock?

If we just want to mock void method and don’t want to perform any logic, we can simply use expectLastCall ().andVoid () right after calling void method on mocked object. You can checkout complete project and more EasyMock examples from our GitHub Repository.

How to create a mock object in powermock?

We can create the mock object using EasyMock but EasyMock doesn’t allow us to mock private methods. So we can use PowerMock EasyMock API extension to mock a class private methods. For stubbing private method behavior, we have to use PowerMock.createPartialMock () to get the mock object.

Here, we’ve used the andAnswer (IAnswer) method to define the behavior of the populateTemperature () method when called. Then, we’ve used the EasyMock.getCurrentArguments () method – that returns the arguments passed to the mock method – to modify the locations passed.

An example of this is the Session.save () method. When we save a new entity, the save () method generates an id and sets it on the entity passed. For this reason, we have to mock the void method to simulate the various processing outcomes. Another time the mocking might come in handy is when testing exceptions thrown by the void method. 4.

If we just want to mock void method and don’t want to perform any logic, we can simply use expectLastCall ().andVoid () right after calling void method on mocked object. You can checkout complete project and more EasyMock examples from our GitHub Repository.

We can create the mock object using EasyMock but EasyMock doesn’t allow us to mock private methods. So we can use PowerMock EasyMock API extension to mock a class private methods. For stubbing private method behavior, we have to use PowerMock.createPartialMock () to get the mock object.