How do you throw an exception in EasyMock?

How do you throw an exception in EasyMock?

Example

1. Step 1: Create an interface called CalculatorService to provide mathematical functions.
2. Step 2: Create a JAVA class to represent MathApplication.
3. Step 3: Test the MathApplication class.
4. Step 4: Execute test cases.
5. Step 5: Verify the Result.

What does EasyMock expectLastCall do?

The API doc for EasyMock says this about expectLastCall() : Returns the expectation setter for the last expected invocation in the current thread. This method is used for expected invocations on void methods.

What does EasyMock verify do?

EasyMock can ensure whether a mock is being used or not. It is done using the verify() method.

How do you test a void on EasyMock?

andVoid() 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 do you mock on EasyMock?

It uses the basic EasyMock concepts of expect, replay and verify.

1. Create mock instances for the objects you need to mock the method calls on, in this case the service and the stuffGetter .
2. Write expectations for the method calls using the expect method.
3. Replay the mock objects, in this case replay both of them.

What method is used to make EasyMock?

The expect() method tells EasyMock to simulate a method with certain arguments. The andReturn() method defines the return value of this method for the specified method parameters. The times() method defines how often the Mock object will be called. The replay() method is called to make the Mock object available.

How do you mock a method on EasyMock?

What is EasyMock replay?

The replay method is used to pass the mock from recording (where you record the method you expect to be called) to replaying state (where you actually test).

How does EasyMock test private methods?

If you still want to use EasyMock, because changing it doesn’t depend on you (work in an enterprise) you can use reflection to change the private field which your method returns, or any private field for that matter. You can have these methods in a helper class for example. And use them as needed.

What is the difference between Mockito and Powermock?

While Mockito can help with test case writing, there are certain things it cannot do viz:. mocking or testing private, final or static methods. That is where, PowerMockito comes to the rescue. PowerMockito is capable of testing private, final or static methods as it makes use of Java Reflection API.

How do you make a mock method?

What is EasyMock capture?

September 22, 2008Written by Rommert de Bruijn. 2 Comments. EasyMock2 is a library that provides an easy way to create on-the-fly mock objects based on interfaces. It can be used in combination with JUnit to create simple and powerful unit tests.

Can we write test cases for private methods?

Strictly speaking, you should not be writing unit tests that directly test private methods. What you should be testing is the public contract that the class has with other objects; you should never directly test an object’s internals.

Can we unit test private methods?

Unit Tests Should Only Test Public Methods

The short answer is that you shouldn’t test private methods directly, but only their effects on the public methods that call them. Unit tests are clients of the object under test, much like the other classes in the code that are dependent on the object.

Why do we use PowerMock?

The main aim of PowerMock is to extend the existing APIs with some methods and annotations to provide extra features that make unit testing quite easy. The PowerMock framework provides a class called PowerMockito used to create mock objects and initiates verification and expectation.

Can we have Mockito and PowerMock together?

Of course you can – and probably will – use Mockito and PowerMock in the same JUnit test at some point of time.

How do you mock an object?

How to Manually Mock Up Java Objects

1. Create fake objects from real classes/interfaces.
2. Instrument the fake objects to respond with specific data for each method.
3. Verify the execution of methods in those fake objects.
4. Verify the arguments passed in the methods of those fake objects.
5. Throw optional Exceptions for some calls.

Can we mock a method?

Mocking is done when you invoke methods of a class that has external communication like database calls or rest calls. Through mocking you can explicitly define the return value of methods without actually executing the steps of the method.

What is Easymock replay?

How do I test a private method?

The best way to test a private method is via another public method.
…
From this article: Testing Private Methods with JUnit and SuiteRunner (Bill Venners), you basically have 4 options:

1. Don’t test private methods.
2. Give the methods package access.
3. Use a nested test class.
4. Use reflection.

What is protected vs private?

private: The type or member can be accessed only by code in the same class or struct . protected: The type or member can be accessed only by code in the same class , or in a class that is derived from that class .

Can we write test case for private method?

What is the difference between PowerMock and PowerMockito?

PowerMock uses a custom classloader and bytecode manipulation to enable mocking of static methods, constructors, final classes and methods, private methods, removal of static initializers and more. PowerMockito is a PowerMock’s extension API to support Mockito.

Is PowerMock recommended?

Powermock allows mocking static or final classes that can not be mocked in Mockito. It sounds great! It can mock anything that might not be the correct way of accessing objects in Java. Still, Powermock is not recommended.

When should I use PowerMock?