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JUnit

95 posts

JUnit 5 Dynamic Tests to Create Flexible and Data-Driven Tests

Last Updated: 28 October 2024

JUnit 5 introduces the powerful feature called Dynamic Tests, which allows for creating test cases at runtime. Unlike static tests that are defined at the compile time, dy...read more

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How to Assert Exceptions in JUnit 4 and JUnit 5?

Last Updated: 29 October 2024

In software testing, particularly in the unit tests, verifying that the code throws the expected exceptions under certain conditions is crucial. JUnit is the widely used t...read more

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Single Assert Call for Multiple Properties in Java Unit Testing

Last Updated: 17 October 2024

Unit testing is essential for verifying that individual units of code function as expected. Writing multiple assertions can make tests lengthy and difficult to maintain wh...read more

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Run JUnit Test Cases From the Command Line

Last Updated: 21 October 2024

JUnit allows us to test individual pieces of code by creating test cases, typically for methods and classes. Running tests via the command line can be beneficial for CI/CD...read more

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JUnit 5 - Temporary Directory Support

Last Updated: 23 October 2024

Managing file and directory operations is a frequent need in automated testing. When testing code that involves creating, modifying, or deleting files, it is important to ...read more

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Unit Testing System.in for Input Handling in JUnit

Last Updated: 25 November 2024

In Java applications, it’s common to read input from System.in for interactive console applications. Unit testing such methods can be challenging because they rely on user...read more

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Assert Regex Matches in JUnit

Last Updated: 22 October 2024

Unit testing is a critical aspect of software development, ensuring that individual components of the application function correctly. JUnit is one of the most widely used ...read more

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How to Test an Abstract Class with JUnit?

Last Updated: 29 October 2024

Testing abstract classes in Java can be challenging due to their incomplete nature. They cannot be instantiated directly. Abstract classes are often used as the blueprint ...read more

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JUnit 5 Method Parameters - Injecting @Mock and @Captor

Last Updated: 23 October 2024

In JUnit 5, testing with mock objects has been significantly enhanced through the use of Mockito. Two essential annotations for working with Mockito are @Mock and @Captor....read more

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Assert Two Lists for Equality Ignoring Order in Java

Last Updated: 21 October 2024

In Java, comparing two lists for equality typically checks both the content and the order of the elements using the equals() method. There are many cases where the order o...read more

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How to Assert Log Messages with JUnit in Java?

Last Updated: 25 November 2024

In Java applications, logging is essential for monitoring application behavior, debugging issues, and tracking performance. Verifying log messages is important for ensurin...read more

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Nested Map Assertions in Java with JUnit

Last Updated: 24 October 2024

In Java applications, nested data structures are commonplace, especially when dealing with configurations, JSON responses, or complex data representations. One such struct...read more

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Running JUnit Tests Programmatically, from a Java Application

Last Updated: 18 October 2024

JUnit is a popular testing framework in the Java ecosystem that enables developers to create and run tests efficiently. While it is common to run tests through IDEs or bui...read more

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Disabling ApplicationRunner and CommandLineRunner Beans During JUnit Testing in Spring Boot

Last Updated: 24 October 2024

In Spring Boot, ApplicationRunner and CommandLineRunner beans are often used to perform specific tasks at application startup, such as initializing data or writing configu...read more

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How to Resolve the ParameterResolutionException in JUnit 5?

Last Updated: 24 October 2024

In JUnit 5, the ParameterResolutionException occurs when JUnit fails to inject a dependency on a test method or constructor. JUnit 5 introduces the concept of dependency i...read more

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