Hi, Hope you are doing Well. This post is focused on Mockito Framework.
Let start with introduction.
What is Mockito?
Mockito is a mocking framework. It is a Java-based library used to create simple and basic test APIs for performing unit testing of Java applications. It can also be used with other frameworks such as JUnit .
It internally uses Java Reflection API and allows to create objects of a service. A mock object returns a dummy data and avoids external dependencies. It simplifies the development of tests by mocking external dependencies and apply the mocks into the code under test.Mockito Maven Dependencies
To implement Mockito based test cases in a project, add the following dependency to the pom.xml file of the project:
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>2.19.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-junit-jupiter</artifactId>
<version>2.19.0</version>
<scope>test</scope>
</dependency>Purpose of Mockito
The main purpose of using the Mockito framework is to simplify the development of a test by mocking external dependencies and use them in the test code. As a result, it provides a simpler test code that is easier to read, understand, and modify
Benefits of Mockito
Annotation Support: It supports creating mocks using various annotations.
No Handwriting: We do not need to write mock objects by own.
Return value support: Supports return values.
Exception support: It supports exceptions.
Order check support: It also supports check on the order of method calls.
Refactoring Safe: Even if we rename an interface method names or reordering parameters will not break the test code as Mocks are created at run time.
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