如何将@RunWith与@RunWith(Parameterized.class)结合起来

Question

我实现了一个继承自BlockJUnit4ClassRunner的运行器类A.class,以便我可以用@RunWith(A.class)注释测试.与此同时,某人 else用RunWith(Parameterized.class)注释测试.很明显,我们不能同时使用两个@RunWith.

如何解决这个问题呢？或者如何合并这两个@RunWith？

Answer 1

我相信这可以做你想要的:

package so.junit.runner;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.model.InitializationError;
import org.junit.runners.parameterized.BlockJUnit4ClassRunnerWithParameters;
import org.junit.runners.parameterized.ParametersRunnerFactory;
import org.junit.runners.parameterized.TestWithParameters;

import java.util.Arrays;

@RunWith(Parameterized.class)
@Parameterized.UseParametersRunnerFactory(CustomParameterizedTest.RunnerFactory.class)
public class CustomParameterizedTest {

  @Parameterized.Parameters
  public static Iterable<Integer> data() {
    return Arrays.asList(new Integer[]{1, 2, 3});
  }

  private int i;

  public CustomParameterizedTest(int i) {
    this.i = i;
  }

  @Test
  public void test() {
    System.out.println(i);
  }

  public static class RunnerFactory implements ParametersRunnerFactory {
    @Override
    public org.junit.runner.Runner createRunnerForTestWithParameters(TestWithParameters test) throws InitializationError {
      return new A(test);
    }
  }

  public static class A extends BlockJUnit4ClassRunnerWithParameters {
    private final Object[] parameters;

    public A(TestWithParameters test) throws InitializationError {
      super(test);
      parameters = test.getParameters().toArray(new Object[test.getParameters().size()]);
    }

    @Override
    public Object createTest() throws Exception {
      return getTestClass().getOnlyConstructor().newInstance(parameters);
    }
  }
}

基于JUnit Parameterized类中的Javadocs,他们希望您创建支持参数化的自定义测试运行器.

UPDATE

已更新以命名自定义运行器 A