Learn the technical principles of Junit Vintage Engine framework in the Java class library
Learn the technical principles of Junit Vintage Engine framework in the Java class library
Junit Vintage Engine is an integral part of the Junit framework, which aims to allow the old version of Junit test cases in the new version of Junit.The technical principles of Junit Vintage Engine in the Java class library, including the following aspects:
1. Compatibility support: Junit Vintage Engine uses a specific converter to convert the old version of the Junit test case into a format suitable for the current Junit version.In this way, the old version of the test case can be run without modifying the code in the Java class library, which maintains compatibility.
2. Test operator: Junit Vintage Engine provides a test operator for the execution of the old version of Junit test cases in the Java class library.Test the operator to identify and load the test code written by the old version of Junit, and perform these code accordingly.
3. Other framework integration: Junit Vintage Engine can also be integrated with other test frameworks.For example, it can be integrated with Junit Platform, allowing the old version of the Junit test cases and the new version of Junit test cases in the same test kit.
The following is an example code that uses Junit Vintage Engine to run the old version of the Junit test case in the Java class library:
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;
public class VintageEngineExample {
public static void main(String[] args) {
Result result = JUnitCore.runClasses(OldJUnitTestClass.class);
// Print test results
for (Failure failure : result.getFailures()) {
System.out.println(failure.toString());
}
// Output test results summary information
System.out.println (result.wassuccessful ()? "Test through": "test failure");
}
}
In the above example code, the `junitcore` class is a major entry point provided by the Junit framework, which is used to perform test cases.`Runclasses ()` method is used to run the specified test class.
After running the above code, Junit Vintage Engine will load and execute the test method in the `Oldjunittestclass`.The execution results will be printed to the console and the summary information of the test results will be output.Based on whether the test results are successful, the printing "Test failure" will pass the "or" test failure ".
By learning Junit Vintage Engine's technical principles in the Java class library, we can better understand and apply this framework so that when migrating to the new version of Junit, we can retain and execute the old version of the Junit test case.
