Analysis of the technical principles of the Kotlin Test Testng framework in the Java class library

Kotlin Test is a test framework for Kotlin language, which is developed based on the Testng framework.This article will analyze the technical principles of the Kotlin Test Testtng framework and provide the corresponding Java code example. 1. Background introduction Testng is a widely used Java test framework, which aims to provide more powerful testing functions, including parallel testing, data -driven testing, dependent testing, etc.Kotlin Test uses Testng's test framework in Kotlin, providing a more elegant and concise test code writing method. Second, technical principles analysis 1. Comment drive The Kotlin Test Testng framework mainly drives testing by annotations and performs corresponding test logic.In Kotlin, the annotation method is used to mark the test method and test class to specify the execution order and dependencies of the test case and the test kit. 2. parallel test Testng framework supports parallel testing, which can run multiple test cases or test kits at the same time.Kotlin Test optimizes and adapts to the characteristics of the Kotlin language, and uses corchers to achieve parallel testing.By adding @kotlinx.coroutines.experentalocoroutinesapi to the test method or test class, use the SUSPEND keyword to identify the function in an appropriate place to achieve parallel testing. 3. Data driver test Testng supports data drivers, that is, to provide test data by using @DataProvider annotations on the test method.In Kotlin Test, you can use @ORG.TESTNG.ANNOTATIONS.FACTORY annotation and data class (data classes) to achieve data -driven testing.By creating a factory class and a data class, the method in the factory class provides test data through @org.testng.annotations.dataProvider annotations, and the attributes in the data class correspond to the field of test data to achieve data -driven testing. 4. Dependent test There may be dependencies between test cases, that is, the execution of a test case depends on the execution results of other test cases.Testng framework provides @test (dependSonMethods = {}) annotations to define the dependencies between test cases.In Kotlin Test, this annotation can also be used to specify the dependency relationship between test cases to ensure the execution order and dependencies of the test. 3. Java code example Here are a Java code example using the Kotlin Test Testng framework: import org.testng.annotations.Test; import kotlin.test.assertEquals; public class CalculatorTest { @Test public void testAddition() { int result = Calculator.add(2, 3); assertEquals(result, 5); } @Test(dependsOnMethods = {"testAddition"}) public void testSubtraction() { int result = Calculator.subtract(5, 3); assertEquals(result, 2); } } In the above example, we used @teest annotations to mark two test methods.The first test method TestAdDition tested the addition of the Calculator class, and the second test method TestSubtraction tested the subtraction operation.Through @test (dependSonMethods = {"testadition"}), we designated the testsubtraction method before executing after the testadDition method is successfully executed to ensure the dependencies between test cases. Summarize: This article analyzes the technical principles of the Kotlin Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test's technical principle provides corresponding Java code examples.The Kotlin Test Testng framework supports parallel testing, data -driven testing and dependent testing through annotations, providing a more elegant and concise writing method for the Kotlin language test.Through in -depth understanding and practice, we can better use the Kotlin Test Test Testng framework for software testing to improve test efficiency and quality.