package org.junit.tests.experimental.theories.runner;import static org.hamcrest.CoreMatchers.is;import static org.hamcrest.CoreMatchers.not;import static org.hamcrest.CoreMatchers.nullValue;import static org.junit.Assert.assertThat;import static org.junit.experimental.results.PrintableResult.testResult;import static org.junit.experimental.results.ResultMatchers.isSuccessful;import static org.junit.internal.matchers.Each.each;import static org.junit.internal.matchers.StringContains.containsString;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.Date;import java.util.List;import org.hamcrest.Matcher;import org.junit.Test;import org.junit.experimental.theories.DataPoint;import org.junit.experimental.theories.PotentialAssignment;import org.junit.experimental.theories.Theories;import org.junit.experimental.theories.Theory;import org.junit.experimental.theories.internal.Assignments;import org.junit.runner.JUnitCore;import org.junit.runner.RunWith;import org.junit.runner.notification.Failure;import org.junit.runners.model.TestClass;public class WithDataPointMethod {	@RunWith(Theories.class)	public static class HasDataPointMethod {		@DataPoint		public static int oneHundred() {			return 100;		}		@Theory		public void allIntsOk(int x) {		}	}	@RunWith(Theories.class)	public static class HasUglyDataPointMethod {		@DataPoint		public static int oneHundred() {			return 100;		}		@DataPoint		public static int oneUglyHundred() {			throw new RuntimeException();		}		@Theory		public void allIntsOk(int x) {		}	}	@Test	public void pickUpDataPointMethods() {		assertThat(testResult(HasDataPointMethod.class), isSuccessful());	}	@Test	public void ignoreExceptionsFromDataPointMethods() {		assertThat(testResult(HasUglyDataPointMethod.class), isSuccessful());	}	@RunWith(Theories.class)	public static class DataPointMethodReturnsMutableObject {		@DataPoint		public static List<Object> empty() {			return new ArrayList<Object>();		}		public static int ONE= 1;		public static int TWO= 2;		@Theory		public void everythingsEmpty(List<Object> first, int number) {			assertThat(first.size(), is(0));			first.add("a");		}	}	@Test	public void mutableObjectsAreCreatedAfresh() {		assertThat(failures(DataPointMethodReturnsMutableObject.class), empty());	}	@RunWith(Theories.class)	public static class HasDateMethod {		@DataPoint		public int oneHundred() {			return 100;		}		public Date notADataPoint() {			return new Date();		}		@Theory		public void allIntsOk(int x) {		}		@Theory		public void onlyStringsOk(String s) {		}		@Theory		public void onlyDatesOk(Date d) {		}	}	@Test	public void ignoreDataPointMethodsWithWrongTypes() throws Exception {		assertThat(potentialValues(				HasDateMethod.class.getMethod("onlyStringsOk", String.class))				.toString(), not(containsString("100")));	}	@Test	public void ignoreDataPointMethodsWithoutAnnotation() throws Throwable {		assertThat(potentialValues(				HasDateMethod.class.getMethod("onlyDatesOk", Date.class))				.size(), is(0));	}	private List<PotentialAssignment> potentialValues(Method method)			throws Exception {		return Assignments.allUnassigned(method,				new TestClass(HasDateMethod.class))				.potentialsForNextUnassigned();	}	private List<Failure> failures(Class<?> type) {		return JUnitCore.runClasses(type).getFailures();	}	private Matcher<Iterable<Failure>> empty() {		Matcher<Failure> nullValue= nullValue();		return each(nullValue);	}}