I implemented a runner class A.class inherited from BlockJUnit4ClassRunner so that I can annotate tests with @RunWith(A.class). At the same time, sb. else annotate the tests with RunWith(Parameterized.class). It is obvious we cannot use two @RunWith at the same time.
How to solve this problem? or how to merge these two @RunWith?
I believe this does what you want:
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);
}
}
}
Based on the Javadocs in the JUnit Parameterized class, this is how they expect you to create a custom test runner that supports parameterization.
UPDATE
Updated to name the custom runner A