JUnit4：创建具有特定测试方法的测试套件

Question

在junit4中，我想要执行不同类中的特定测试方法，即想要创建一个包含来自不同类的特定测试方法的测试套件。

假设我有两个类：

public class Test_Login {
    @Test
    public void test_Login_001(){
        System.out.println("test_Login_001");
    }

    @Test
    public void test_Login_002(){
        System.out.println("test_Login_002");
    }

    @Test
    public void test_Login_003(){
        System.out.println("test_Login_003");
    }
}


public class Logout {   

    @Test
    public void test_Logout_001(){  
        System.out.println("test_Logout_001");  
    }

    @Test
    public void test_Logout_002(){
        System.out.println("test_Logout_002");
    }

    @Test
    public void test_Logout_003(){
        System.out.println("test_Logout_003");
    }
}

我想执行上述类中的test_Login_001、test_Login_003和test_Logout_002测试方法。

junit4怎么实现这个呢？

- V K

Answer 1

自JUnit 4.8引入了类别以来，就存在一种清晰的解决方案，创建一个TestSuite：

@RunWith(Categories.class)
@IncludeCategory(MustHaveTests.class)
@SuiteClasses( { Test_Login.class, Test_Logout.class }) 
public class MustHaveTestsTestSuite {
    public interface MustHaveTests { /* category marker */ }

}

每个想要在TestSuite中运行的测试上方，添加@Category(MustHaveTests.class)，例如：

@Category(MustHaveTests.class)
@Test
public void test_Login_001(){
    System.out.println("test_Login_001");
}

运行TestSuite时，只有标记为MustHaveTests的测试将被执行。更多细节请参阅@Category：https://github.com/junit-team/junit4/wiki/categories

- Murmel

Answer 2

你需要创建一个 org.junit.runner.Request 并将其传递给 JunitCore 运行器，或者实际上是任何运行器。

JUnitCore junitRunner = new JUnitCore();
Request request = Request.method(Logout.class, "test_Logout_002");
Result result = junitRunner.run(request);

我实际上创建了一个注解，可以使用这些注解搜索方法并动态创建请求并运行它们。

public class TestsSuite {

public static void main(String[] args) throws Exception {
    Class annotation = MyTestAnnotation.class;
    JUnitCore junitRunner = new JUnitCore();
    Class testClass = Test_Login.class;
    Method[] methods = testClass.getMethods();
    for (Method method : methods) {
        if (method.isAnnotationPresent(annotation)) {
            if (method.isAnnotationPresent(org.junit.Test.class)) {
                Request request = Request.method(testClass, method.getName());
                Result result = junitRunner.run(request);
                System.out.println(result.wasSuccessful());
            }
        }
    }
}

}

- Fuad Malikov

Answer 3

这可能不是最流畅的实现方式，但我通过创建一个新的 @SuiteMethods 注释来解决类似的问题，具体如下：

SuiteMethods.java

@Retention(RUNTIME)
@Target(TYPE)
public @interface SuiteMethods {
    String[] value() default {""};
}

FilteredSuite.java

public class FilteredSuite extends Categories {

    private static String[] TEST_METHODS_TO_RUN = {""};  // default behavior is to run all methods 

    private static Class<?> extractMethodNamesFromAnnotation(Class<?> clazz) {
        SuiteMethods methodsAnnotation = clazz.getAnnotation(SuiteMethods.class);
        if (methodsAnnotation != null) {
            // if our MethodsAnnotation was specified, use it's value as our methods filter
            TEST_METHODS_TO_RUN = methodsAnnotation.value();
        }        
        return clazz;
    }

    public static Filter getCustomFilter() {
        Filter f = new Filter() {

            @Override
            public boolean shouldRun(Description desc) {
                String methodName = desc.getMethodName();
                for (String subString : TEST_METHODS_TO_RUN) {
                    if (methodName == null || methodName.contains(subString)) {
                        return true;
                    }
                }
                return false;
            }

            @Override
            public String describe() {
                return null;
            }
        };
        return f;
    }

    public FilteredSuite(Class<?> arg0, RunnerBuilder arg1) throws InitializationError {
        super(extractMethodNamesFromAnnotation(arg0), arg1);            
    }

    @Override
    public void filter(Filter arg0) throws NoTestsRemainException {
        // At test suite startup, JUnit framework calls this method to install CategoryFilter.
        // Throw away the given filter and install our own method name filter 
        super.filter(getCustomFilter());
    }
}

一个使用示例。

@RunWith(FilteredSuite.class)
@SuiteClasses({
    GroupRestTest.class,
    ScenarioRestTest.class
})
@SuiteMethods({
    "testReadOnlyFlag",
    "testSheetWriteData",
    "testAddScenarioMeta"
})
public class SubsetTestSuite {
}

- Kenneth Sizer