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Junit Vs Junit Jupiter : testing frameworks for Java

Junit Vs Junit Jupiter: JUnit and JUnit Jupiter are popular testing frameworks for Java programming language, which are used to write and run tests for software applications. With the release of JUnit Jupiter, developers got the option to use JUnit’s next version. In this blog, we will compare JUnit vs JUnit Jupiter and explore their differences and similarities with examples and a comparison table.

JUnit

JUnit is a widely used testing framework for Java programming language, which provides annotations and APIs to write and run tests. It comes with a test runner that can execute the tests and generate the test reports. Let’s take an example of a simple JUnit test:

java

import org.junit.Test; import static org.junit.Assert.assertEquals; public class MyTest { @Test public void testMethod() { String str = “JUnit”; assertEquals(“JUnit”, str); } }

In the above example, we have used the @Test annotation to mark the method as a test method, and we have used the assertEquals() method to check the expected output of the code.

JUnit Jupiter

JUnit Jupiter is the next version of JUnit, which comes with new features and improvements. It provides annotations and APIs to write and run tests. JUnit Jupiter also comes with a test runner that can execute the tests and generate the test reports. Let’s take an example of a simple JUnit Jupiter test:

java

import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.assertEquals; public class MyTest { @Test public void testMethod() { String str = “JUnit Jupiter”; assertEquals(“JUnit Jupiter”, str); } }

In the above example, we have used the @Test annotation from the org.junit.jupiter.api package to mark the method as a test method, and we have used the assertEquals() method from the same package to check the expected output of the code.

Junit Vs Selenium

Comparison Table

Features JUnit JUnit Jupiter
Annotations @Test, @Before, @After, @Ignore @Test, @BeforeEach, @AfterEach, @BeforeAll, @AfterAll, @DisplayName, @Nested, @Tag
Assertions assertTrue, assertFalse, assertEquals, assertNull, assertNotNull, assertThrows assertAll, assertTrue, assertFalse, assertEquals, assertNotEquals, assertArrayEquals, assertNull, assertNotNull, assertThrows, assertTimeout
Parameterized Tests Supported Supported with more flexibility
Dynamic Tests Not Supported Supported
Execution Order Sequential Parallel
Architecture JUnit 4 architecture JUnit 5 architecture
IDE Support Eclipse, IntelliJ IDEA, NetBeans Eclipse, IntelliJ IDEA, NetBeans

Annotations

Both JUnit and JUnit Jupiter provide annotations to write and run tests, but JUnit Jupiter provides more annotations. For example, JUnit Jupiter provides the @BeforeEach, @AfterEach, @BeforeAll, @AfterAll, @DisplayName, @Nested, and @Tag annotations, which are not available in JUnit. These annotations make it easy to write and organize tests.

Assertions

Both JUnit and JUnit Jupiter provide assertions to check the expected output of the code. JUnit Jupiter provides more assertions than JUnit. For example, JUnit Jupiter provides assertAll(), assertNotEquals(), assertArrayEquals(), and assertTimeout(), which are not available in JUnit. These assertions make it easy to write and run tests.

Parameterized Tests

Both JUnit and JUnit Jupiter support parameterized tests, but JUnit Jupiter provides more flexibility. For example, JUnit Jupiter allows passing parameters using various sources, such as CSV files, Enum constants, and custom providers, while JUnit only allows passing parameters using arrays or collections.

Dynamic Tests

Dynamic tests are tests that are generated at runtime. JUnit Jupiter provides support for dynamic tests, while JUnit does not. This feature is useful when we want to generate tests based on some criteria or data at runtime.

Execution Order

JUnit runs the tests sequentially, while JUnit Jupiter can run tests in parallel, which can speed up the execution time of tests. However, running tests in parallel can also lead to issues like race conditions, so it should be used with caution.

Architecture

JUnit is based on JUnit 4 architecture, while JUnit Jupiter is based on JUnit 5 architecture. JUnit 5 architecture provides more flexibility and modularity, making it easy to extend and customize.

IDE Support

Both JUnit and JUnit Jupiter are supported by popular IDEs like Eclipse, IntelliJ IDEA, and NetBeans, making it easy to write, run, and debug tests.

JUnit and JUnit Jupiter are popular testing frameworks for Java programming language, each with their own set of features and advantages. While JUnit is still widely used, JUnit Jupiter provides more flexibility and new features that make it easier to write and run tests. It is recommended to use JUnit Jupiter for new projects or if you need more advanced testing features, while JUnit is still a good choice for simple projects or if you need backward compatibility with older code.

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