parameterizedtestmethodtest.java

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package org.junit.tests;

import static org.junit.Assert.assertEquals;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import junit.framework.JUnit4TestAdapter;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.internal.runners.InitializationError;
import org.junit.internal.runners.JUnit4ClassRunner;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class ParameterizedTestMethodTest {

	@SuppressWarnings("all")  
	public static class EverythingWrong {
		private EverythingWrong() {}
		@BeforeClass public void notStaticBC() {}
		@BeforeClass static void notPublicBC() {}
		@BeforeClass public static int nonVoidBC() { return 0; }
		@BeforeClass public static void argumentsBC(int i) {}
		@BeforeClass public static void fineBC() {}
		@AfterClass public void notStaticAC() {}
		@AfterClass static void notPublicAC() {}
		@AfterClass public static int nonVoidAC() { return 0; }
		@AfterClass public static void argumentsAC(int i) {}
		@AfterClass public static void fineAC() {}
		@After public static void staticA() {}
		@After void notPublicA() {}
		@After public int nonVoidA() { return 0; }
		@After public void argumentsA(int i) {}
		@After public void fineA() {}
		@Before public static void staticB() {}
		@Before void notPublicB() {}
		@Before public int nonVoidB() { return 0; }
		@Before public void argumentsB(int i) {}
		@Before public void fineB() {}
		@Test public static void staticT() {}
		@Test void notPublicT() {}
		@Test public int nonVoidT() { return 0; }
		@Test public void argumentsT(int i) {}
		@Test public void fineT() {}
	}

	private Class<?> fClass;
	private int fErrorCount;

	static public class SuperWrong {
		@Test void notPublic() {
		}
	}

	static public class SubWrong extends SuperWrong {
		@Test public void justFine() {
		}
	}

	static public class SubShadows extends SuperWrong {
		@Override
		@Test public void notPublic() {
		}
	}

	public ParameterizedTestMethodTest(Class<?> class1, int errorCount) {
		fClass= class1;
		fErrorCount= errorCount;
	}
	
	@Parameters
	public static Collection<Object[]> params() {
		return Arrays.asList(new Object[][] {
				{ EverythingWrong.class, 1 + 4 * 5 }, { SubWrong.class, 1 },
				{ SubShadows.class, 0 } });
	}
	
	private List<Throwable> validateAllMethods(Class<?> clazz) {
		try {
			new JUnit4ClassRunner(clazz);
		} catch (InitializationError e) {
			return e.getCauses();
		}
		return Collections.emptyList();
	}
	
	@Test public void testFailures() throws Exception {
		List<Throwable> problems= validateAllMethods(fClass);
		assertEquals(fErrorCount, problems.size());
	}
	public static junit.framework.Test suite() {
		return new JUnit4TestAdapter(ParameterizedTestMethodTest.class);
	}
}