withextendedparametersources.java

junit

package org.junit.tests.experimental.theories.runner;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.junit.Assert.assertThat;
import static org.junit.experimental.results.PrintableResult.testResult;
import static org.junit.experimental.results.ResultMatchers.isSuccessful;
import org.junit.Test;
import org.junit.experimental.results.ResultMatchers;
import org.junit.experimental.theories.DataPoint;
import org.junit.experimental.theories.DataPoints;
import org.junit.experimental.theories.Theories;
import org.junit.experimental.theories.Theory;
import org.junit.experimental.theories.suppliers.TestedOn;
import org.junit.runner.JUnitCore;
import org.junit.runner.RunWith;

public class WithExtendedParameterSources {
	@RunWith(Theories.class)
	public static class ParameterAnnotations {
		@Theory
		public void everythingIsOne(@TestedOn(ints= { 1 })
		int number) {
			assertThat(number, is(1));
		}
	}

	@Test
	public void testedOnLimitsParameters() throws Exception {
		assertThat(testResult(ParameterAnnotations.class), ResultMatchers
				.isSuccessful());
	}

	@RunWith(Theories.class)
	public static class ShouldFilterNull {
		@DataPoint
		public static String NULL= null;

		@DataPoint
		public static String A= "a";

		@Theory(nullsAccepted= false)
		public void allStringsAreNonNull(String s) {
			assertThat(s, notNullValue());
		}
	}

	@Test
	public void shouldFilterNull() {
		assertThat(testResult(ShouldFilterNull.class), isSuccessful());
	}

	@RunWith(Theories.class)
	public static class DataPointArrays {
		public static String log= "";

		@DataPoints
		public static String[] STRINGS= new String[] { "A", "B" };

		@Theory
		public void addToLog(String string) {
			log+= string;
		}
	}

	@Test
	public void getDataPointsFromArray() {
		DataPointArrays.log= "";
		JUnitCore.runClasses(DataPointArrays.class);
		assertThat(DataPointArrays.log, is("AB"));
	}

	@RunWith(Theories.class)
	public static class DataPointArrayMethod {
		public static String log= "";

		@DataPoints
		public static String[] STRINGS() {
			return new String[] { "A", "B" };
		};

		@Theory
		public void addToLog(String string) {
			log+= string;
		}
	}

	@Test
	public void getDataPointsFromArrayMethod() {
		DataPointArrayMethod.log= "";
		JUnitCore.runClasses(DataPointArrayMethod.class);
		assertThat(DataPointArrayMethod.log, is("AB"));
	}

	@RunWith(Theories.class)
	public static class DataPointMalformedArrayMethods {
		public static String log= "";

		@DataPoints
		public static String[] STRINGS() {
			return new String[] { "A", "B" };
		};

		@DataPoints
		public static String STRING() {
			return "C";
		}

		@DataPoints
		public static int[] INTS() {
			return new int[] { 1, 2, 3 };
		}

		@Theory
		public void addToLog(String string) {
			log+= string;
		}
	}

	@Test
	public void getDataPointsFromArrayMethodInSpiteOfMalformedness() {
		DataPointArrayMethod.log= "";
		JUnitCore.runClasses(DataPointArrayMethod.class);
		assertThat(DataPointArrayMethod.log, is("AB"));
	}
	
	@RunWith(Theories.class)
	public static class DataPointArrayToBeUsedForWholeParameter {
		public static String log= "";

		@DataPoint
		public static String[] STRINGS= new String[] { "A", "B" };

		@Theory
		public void addToLog(String[] strings) {
			log+= strings[0];
		}
	}

	@Test
	public void dataPointCanBeArray() {
		DataPointArrayToBeUsedForWholeParameter.log= "";
		JUnitCore.runClasses(DataPointArrayToBeUsedForWholeParameter.class);
		assertThat(DataPointArrayToBeUsedForWholeParameter.log, is("A"));
	}
}