UNIT Testing Practors of Java Class Libraries with Mockito Inline Framework

Use the Mockito Inline framework to perform the unit test practice of the Java class library Summary: Unit test is one of the important means to ensure software quality, and Mockito is a popular Java simulation test framework for Java applications.This article will introduce how to use the Mockito Inline framework for the unit test of the Java class library, and provide a specific Java code example description. introduction: During the software development process, unit testing is a test method to verify whether the smallest functional unit in the code work is as expected.By writing test cases for each method and class, developers can ensure the correctness and stability of the code.In the field of Java development, Mockito is a very popular open source test framework that can help developers create and manage simulation objects in order to accurately verify code in unit testing. Introduction to Mockito Inline framework: Mockito Inline is part of the Mockito test framework, which provides internal support for simulation objects in the Junit 5 test.It can be used with Junit 5 to simplify the writing and execution of unit testing.The Mockito Inline framework integrates the function of Mockito into the test code through an analog object instance created by the inner United.By passing the simulation object as a parameter to the constructor or method of the tested object, developers can easily verify and operate simulation behavior. Steps to use the Mockito Inline framework: The following are the basic steps to test the unit test using the Mockito Inline framework for the Java class library: 1. Introduce the Mockito library and Junit 5 library.Add related dependencies in the configuration file of the construction tool (such as Maven or Gradle). 2. Create a test class and mark the @teest annotation of Junit 5. 3. The test method and use Mockito's annotation @mock to mark it to create an analog object for the test method.For example: @ExtendWith(MockitoExtension.class) class MyLibraryTest { @Mock private MyDependency myDependency; @Test void testMyLibraryMethod() { // Test logic } } 4. When using the simulation object created by @mock annotations, call the relevant method in the test method.For example: @Test void testMyLibraryMethod() { Mockito.when(myDependency.getValue()).thenReturn(10); // Call the method of being tested and verify the behavior of the analog object MyLibrary myLibrary = new MyLibrary(myDependency); int result = myLibrary.calculate(); Mockito.verify(myDependency).getValue(); assertEquals(20, result); } In the above example, we define the behavior of analog objects by using Mockito's When-thenreturn syntax.We then created an example of the test object and called the method.Finally, the Verify method of Mockito verifies the behavior of the analog object and uses an assertion to verify the return value of the method. 5. Run the test method.Use Junit to run test and check the results. in conclusion: By using the Mockito Inline framework, developers can easier to conduct a unit test of the Java library.It provides convenient ways to create and manage simulated objects and verify code during the test.Using the Mockito Inline framework, developers can reconstruct or optimize the code more confidently without worrying about the introduction of new errors.Therefore, using the Mockito Inline framework can significantly improve the quality and maintenance of software development. references: -Mockito Inline official document: https://javadoc.io/org.mockito/mockito-inline/3.12.4/org/inline/mockitoext entrance.html -JUNIT 5 official document: https: //junit.org/junit5/docs/current/user- guide/ -Mockito official document: https: //javadoc.io/doc/org.mockito/mockito-core/lag/mockito/mockito.html