Verify static method was called with PowerMock | Automation Rhapsody
The classes that are normally not mockable needs to be prepared for testability by Optionally verify that the static method was actually called. Stubbing static methods Lets suppose you have a class with a static method and we want to stub out its. Post summary: How to verify that static method was called during a unit test In Mock static methods in JUnit with PowerMock example post.
Spock supports examining method arguments using Groovy closures. Groovy closures are very similar to Java 8 lambda expressionsso you don't need any special knowledge to understand them if you have already worked with Java 8.
Here is the Spock test that not only verifies that the email event was recorded, but also checks its values: InvoiceStorage is just used as a helper, so we stub it EmailSender will be used to verify that an email was sent.
We create a Mock for it, and EventRecorder will also be used to verify the event that was emitted. We also create a mock for it.
The creation of these 3 mocks happens in the setup method. Our class under test now has 3 fake dependencies, and we have full control of all input and output that happens during the unit test.
The unit test itself has a slightly different structure from the ones we have seen before. This time, we have the following blocks: First of all, it verifies that the email was indeed sent as in the previous section.
This line is the same as with the previous section. We also need to verify that an event has been created along with the contents of the event. We employ an and: The last line of the test means: If all the above are true, the test will succeed. If any of these statements is false, the whole test will fail.
Spock is so smart that it can detect the difference between an invocation that has arguments that are similar, but not exactly the same. Let's assume that we have a bug in our application, and that the timestamp property is not correctly set. Spock will present the following test error: Event ceb Here, Spock tells us that, while our method was indeed called once, it was not called with the arguments we requested. Forming Dynamic Responses for Mocks The previous examples of Spock unit tests will cover most of your testing needs.
We will now cover some advanced Spock examples that deal with dynamic manipulations of arguments and responses from mocks. Again, Spock is based on Groovy closures for both of these features. If you know your way around Java 8 lambda expressions, then it should be very easy to follow. However, keep in mind that dynamic manipulation of arguments and responses is an advanced technique that will be needed only for some very specific corner cases in your unit tests.
Use dynamic responses only as a last resort in your unit tests.
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Dynamic Manipulation of Arguments with Spock Let's see an example where we just want to modify the argument itself. We'll assume that you want to test the following class: Even though the DAO logic itself is very basic, the fact that once the customer is saved using the persist method, its database ID is sent to the logger presents a problem. For this contrived example, the code will work just fine in the real system, as the database will indeed assign an ID to the object as soon as it is saved.
How can we replicate this processing in our unit test? Spock can still create a unit test for this scenario with the following test: The EntityManager class is stubbed, and The Logger class is mocked because we need to verify its info method. The most important line of the whole unit test is the following: The first part uses the underscore character as an argument. The underscore character is a special character in Spock, and it means "any".
It is used as an argument matcher that can match any value of the argument. The syntax as Customer is another special Spock construct that makes the test a bit more strict by ensuring that the argument is indeed a Customer class. Therefore, the first part of the statement matches the call of the persist method with any kind of argument that is a Customer.
The equivalent matcher in Mockito would be when entityManager. In this particular example, the persist method doesn't return anything. This is all that is needed to create dynamic responsesin Spock. Mockito would need a special Answer construct here. The last part of the test the then: It just verifies that the info method was executed once with the correct arguments and more specifically with the ID equal to which was stubbed in the when: Dynamic Responses Based on Arguments with Spock As a grand finale, we will see an extreme unit test where the answer of a mock depends on the argument.
Let's assume that you want to test the following class: We want to test the method called massRegisteras the register one is private. In theory, we could pass a list of just one customer in our unit test, but in practice it is best to try with a long list of customers.
The code here is very simple, and it does no error checking at all, but in a production system there might be several consistency checks before a customer is registered. A realistic unit test would pass a huge list of customers with various problems, so that all checks can be evaluated during unit testing.
Mockito verify method not called dating: Spying with Mockito - to call or not to call a method
Let's say we want to test using a list of 20 customers. A more concise way is the following: It combines simple stubbing, simple mocking, dynamic arguments and argument verification in the same file!
- Post summary: How to verify that static method was called during a unit test with PowerMock.
- Stubbing and Mocking in Java with the Spock Testing Framework
Let's analyze everything in turn. Our class under test is MassUserRegistration and has two dependencies: We will create a stub for it as we use it as a helper class Class EventRecorder. We will mock it because we want to verify the emission of events for each user registration. In our setup method we stub UserRepository using dynamic arguments: To make the test a bit more strict we make sure that the arguments are Strings the as String syntax. If non-string arguments are passed, the unit test will fail.
It uses a closure with two argument where the first one is named firstName, and the second one is named lastName. These values are used for the creation of a new Customer object. The combination of these two parts translates to: Whenever the saveCustomer of the userRepository object is called with any Strings as arguments, name those arguments firstName and lastName, create a new Customer object on the fly using those two strings in the constructor, concatenate these two strings with a space and assign the result to the fullName property of the customer, set the since property to the current date, and return the Customer created to the method caller.
All these actions will be performed by Spock during the course of the unit test. Regardless of the size of our testing data, the UserRepository mock will always return the correct response to the class under test.
First of all, we use the Groovy each iteration that allows us to use a closure for each Customer. This is equivalent to the Java 8 forEach statement.
Then, we employ the same argument verification we have seen in the previous section inside the closure. For each customer passed in the recordEvent method, we verify that the event emitted is of type Type. Notice that the unit test is written in such a way that the size of the input data is actually irrelevant.
We can expand the test data from 20 customers to customers, to customers, and the mocking and verification code will remain unchanged.
This would not be the case if we had manually stubbed a different response for each specific customer. Continuous Integration for Spock on Semaphore Now that we have our tests, we can start doing continuous integration CI.
The first step is to integrate our project's repository with Semaphorea hosted CI service. Semaphore will wait for any pushes to our repository, and will then run our tests for us. Semaphore comes with an included stack of Java toolsincluding Maven and Gradle, allowing us to set up our project with minimal effort.
All that we need to do is add our repositorylet Semaphore figure out our build configuration, and we'll be good to go with little or no tweaking. Summary In this tutorial, we've written several unit tests using Spock for both stubbing and mocking. Where to Go from Here We've seen Spock's most important mocking features, but there are several more to explore: There are more ways to restrict argument matchers, The number of verifications can also be described using Groovy rangesStubs can be instructed to throw exceptions for negative testing scenariosYou can also verify the event order as they happen in a unit test using multiple then: If you have any questions and comments, feel free to leave them in the section below.
Also, feel free to share this tutorial with anyone you think might benefit from it. If we wanted to, we could specify params after that like PowerMockito. Java - Verifying a call of a static void method with powermockito - Stack Overflow In this case, as we move our test from environment to environment, the results of the above method will change. Thus I stumbled across Mockito and PowerMockito and was very happy with the results.
Method invocation count assertion But what it does do is it implements the test correctly and demonstrates my point. Here is my method that is responsible for adding clients to DataBase. One of the key aspects of unit testing is the ability to predict the ejemplos de humildad yahoo dating of our test based on a given input. At first this struck me as a pretty useless idea. Notice that we also use Mockito. Spying with Mockito - to call or not to call a method Power spying to stub private methods Lets suppose we want to spy on an object but we want a private method to do something else.
It just means you may need to re-evaluate your toolset. Spying should be sporadic and overriding exception-stubbing is very rare. This is where spying and PowerMockito comes into place. Android - Verify a static method was called by another static method in PowerMock - Stack Overflow However, there is a scenario where is come come in very handy Execute the method under test.
Verify static method call Again, notice that we can still verify that bark was called even though we stubbed it out. Mock a jUnit test using powermockito Since static methods exist at the class level, we create a partial mock of all static methods with the mockStatic method.15 Mockito static methods
If you are feeling powerful and a bit naughty, I think you are doing it right.