How do I hide a protected method in JUnit?

How do you cover a private method in JUnit?

So whether you are using JUnit or SuiteRunner, you have the same four basic approaches to testing private methods:

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

Can we write JUnit for protected methods?

The easiest way would be to make sure your tests are in the same package hierarchy as the class you are testing. If that’s not possible then you can subclass the original class and create a public accessor that calls the protected method.

Can you unit test a protected method?

To test a protected method using junit and mockito, in the test class (the class used to test the method), create a “child class” that extends the protagonist class and merely overrides the protagonist method to make it public so as to give access to the method to the test class, and then write tests against this child …

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How do you override a protected method?

Yes, the protected method of a superclass can be overridden by a subclass. If the superclass method is protected, the subclass overridden method can have protected or public (but not default or private) which means the subclass overridden method can not have a weaker access specifier.

How do you mock a private method in JUnit?

For Mockito, there is no direct support to mock private and static methods. In order to test private methods, you will need to refactor the code to change the access to protected (or package) and you will have to avoid static/final methods.

How do you mock a private variable in JUnit?

Mocking a Private Variable that is Assumed to Exist

  1. Add a variable in your test class for the class you are testing, and give it the annotation @InjectMocks (org. …
  2. Use @Mock annotations to setup the mocks you want to inject. …
  3. In either a setup function or before you call your class, initialize the mocks.

How can protected methods be tested using JUnit Mcq?

To test the protected method, the test class is declared in the same package as the target class. There is no direct way for testing of the private method; hence manual testing is to be performed, or the method is changed to “protected” method. JUnit test methods are designed to return ‘void’.

How do I access protected methods?

If you can put the calling class in the same package you will have access to the method. This and inheriting from that class are the only non-reflective ways to access a protected method. As already said, subclassing is normally the standard way to access that method.

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How do you mock a static method in JUnit without Powermock?

You can use Mockito (since version 3.4. 0) to mock static methods. This requires the dependency org. mockito:mockito-inline:3.4.

How do you make a JUnit test suite?

Create Test Suite Class

  1. Create a java class.
  2. Attach @RunWith(Suite. class) Annotation with the class.
  3. Add reference to JUnit test classes using @Suite. SuiteClasses annotation.

Can we mock protected methods?

A couple options: declare your test in the same package as the mocked class. change the visibilty of the method if you can. create a local (inner) class that extends the mocked class, then mock this local class.

How do I create an expected exception in JUnit?


By using “expected” parameter, you can specify the exception name our test may throw. In above example, you are using “IllegalArgumentException” which will be thrown by the test if a developer uses an argument which is not permitted.

How do I access a protected method outside the package?

The protected access modifier is accessible within the package. However, it can also accessible outside the package but through inheritance only. We can’t assign protected to outer class and interface. If you make any constructor protected, you cannot create the instance of that class from outside the package.

Can public be overridden?

If the overridden or hidden method is public, then the overriding or hiding method must be public; otherwise, a compile-time error occurs. If the overridden or hidden method is protected, then the overriding or hiding method must be protected or public; otherwise, a compile-time error occurs.

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Can we reduce the visibility of the overridden method?

You cannot reduce the visibility of a inherited method. Here parent class has func() method which is public and overridden by the subclass TestClass which is private.