Junit Jupiter Engine framework technology in the Java class library
Junit Jupiter Engine framework technology in the Java class library
Overview:
JUNIT JUPITER Engine is a key component in Junit 5, which implements a new test framework.This article will discuss and show some important features of Junit Jupiter Engine and its application in the Java class library.
1 Introduction
In the process of software development, automation testing is a vital link.Junit has always been one of the most commonly used test frameworks in the Java community.For the limitations and deficiencies of Junit 4, Junit 5 launched a new architecture that contains Junit Jupiter Engine.Junit Jupiter Engine provides many new features, such as Lambda expression, parameterized testing, dynamic testing, etc., making the test more flexible, simple and scalable.
2. Use examples
Here are the common features of several Junit Jupiter Engine frameworks.
a.
Junit Jupiter Engine provides a wealth of assertions, making the test code writing more concise and clear.For example, we can use an assertion method `assertequals` to compare whether two values are equal:
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
public class MyUnitTest {
@Test
public void testAddition() {
int result = 1 + 1;
Assertions.assertEquals(2, result);
}
}
b. Parameterization test
Junit Jupiter Engine also supports parameter testing, which can run the same test method through multiple sets of parameters.For example, we can use the@csvsource` annotation to provide multiple groups of parameter values to test a method:
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
public class MyUnitTest {
@ParameterizedTest
@CsvSource({"1, 2, 3", "4, 5, 9", "10, 20, 30"})
public void testAddition(int a, int b, int expected) {
int result = a + b;
Assertions.assertEquals(expected, result);
}
}
c. Dynamic test
Junit Jupiter Engine also introduced the concept of dynamic testing, which can dynamically generate test cases and execute it at runtime.For example, we can use the `dynamicContainer` and` dynamictest` to dynamically generate test cases:
import org.junit.jupiter.api.DynamicContainer;
import org.junit.jupiter.api.DynamicNode;
import org.junit.jupiter.api.DynamicTest;
import org.junit.jupiter.api.TestFactory;
import java.util.Arrays;
import java.util.Collection;
public class MyUnitTest {
@TestFactory
public Collection<DynamicNode> testDynamicTests() {
return Arrays.asList(
DynamicContainer.dynamicContainer("Dynamic Container 1",
Arrays.asList(
DynamicTest.dynamicTest("Test 1", () -> {
// Test code
}),
DynamicTest.dynamicTest("Test 2", () -> {
// Test code
})
)),
DynamicContainer.dynamicContainer("Dynamic Container 2",
Arrays.asList(
DynamicTest.dynamicTest("Test 3", () -> {
// Test code
}),
DynamicTest.dynamicTest("Test 4", () -> {
// Test code
})
))
);
}
}
3. Application scenario
Junit Jupiter Engine has a wide range of application scenarios in the development of the Java library.It can be used for various test needs such as unit testing, integration testing, and performance testing.
In the development of the Java class library, we can use Junit Jupiter Engine to write unit tests, and to achieve various initialization and cleaning operations through the annotations of `@befaceall` and@afterrall.In addition, the parameterized testing characteristics of Junit Jupiter Engine can help us quickly test the boundaries under different combinations.Dynamic testing features can be used to automatically generate a series of repeated test cases to improve test efficiency.
In addition, Junit Jupiter Engine and other test tools and frameworks (such as Mockito and Spring Boot) are also very easy, which can further simplify the writing and maintenance of test code.
Summarize:
Junit Jupiter Engine is one of the core components in Junit 5. It provides many new features that make the test more flexible, simple and scalable.In the development of the Java class library, Junit Jupiter Engine can be widely used in various test scenarios such as unit testing and integrated testing.Through the introduction of this article, you can understand the basic characteristics of Junit Jupiter Engine and their applications in the Java class library.I hope this article will help you explore and apply Junit Jupiter Engine framework technology.
