/*
 * Copyright 2002-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.test.context.junit4;

import java.io.IOException;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.concurrent.atomic.AtomicInteger;

import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runner.Runner;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import org.springframework.test.annotation.Repeat;
import org.springframework.test.annotation.Timed;
import org.springframework.test.context.TestExecutionListeners;
import org.springframework.util.ClassUtils;

import static org.junit.Assert.*;
import static org.springframework.test.context.junit4.JUnitTestingUtils.*;

/**
 * Verifies proper handling of the following in conjunction with the
 * {@link SpringJUnit4ClassRunner}:
 * <ul>
 * <li>Spring's {@link Repeat @Repeat}</li>
 * <li>Spring's {@link Timed @Timed}</li>
 * </ul>
 *
 * @author Sam Brannen
 * @since 3.0
 */
@RunWith(Parameterized.class)
public class RepeatedSpringRunnerTests {

	protected static final AtomicInteger invocationCount = new AtomicInteger();

	private final Class<?> testClass;

	private final int expectedFailureCount;
	private final int expectedStartedCount;
	private final int expectedFinishedCount;
	private final int expectedInvocationCount;


	@Parameters(name = "{0}")
	public static Object[][] repetitionData() {
		return new Object[][] {//
			{ NonAnnotatedRepeatedTestCase.class.getSimpleName(), 0, 1, 1, 1 },//
			{ DefaultRepeatValueRepeatedTestCase.class.getSimpleName(), 0, 1, 1, 1 },//
			{ NegativeRepeatValueRepeatedTestCase.class.getSimpleName(), 0, 1, 1, 1 },//
			{ RepeatedFiveTimesRepeatedTestCase.class.getSimpleName(), 0, 1, 1, 5 },//
			{ RepeatedFiveTimesViaMetaAnnotationRepeatedTestCase.class.getSimpleName(), 0, 1, 1, 5 },//
			{ TimedRepeatedTestCase.class.getSimpleName(), 3, 4, 4, (5 + 1 + 4 + 10) } //
		};
	}

	public RepeatedSpringRunnerTests(String testClassName, int expectedFailureCount,
			int expectedTestStartedCount, int expectedTestFinishedCount, int expectedInvocationCount) throws Exception {
		this.testClass = ClassUtils.forName(getClass().getName() + "." + testClassName, getClass().getClassLoader());
		this.expectedFailureCount = expectedFailureCount;
		this.expectedStartedCount = expectedTestStartedCount;
		this.expectedFinishedCount = expectedTestFinishedCount;
		this.expectedInvocationCount = expectedInvocationCount;
	}

	protected Class<? extends Runner> getRunnerClass() {
		return SpringJUnit4ClassRunner.class;
	}

	@Test
	public void assertRepetitions() throws Exception {
		invocationCount.set(0);

		runTestsAndAssertCounters(getRunnerClass(), this.testClass, expectedStartedCount, expectedFailureCount,
			expectedFinishedCount, 0, 0);

		assertEquals("invocations for [" + testClass + "]:", expectedInvocationCount, invocationCount.get());
	}


	@TestExecutionListeners({})
	public abstract static class AbstractRepeatedTestCase {

		protected void incrementInvocationCount() throws IOException {
			invocationCount.incrementAndGet();
		}
	}

	public static final class NonAnnotatedRepeatedTestCase extends AbstractRepeatedTestCase {

		@Test
		@Timed(millis = 10000)
		public void nonAnnotated() throws Exception {
			incrementInvocationCount();
		}
	}

	public static final class DefaultRepeatValueRepeatedTestCase extends AbstractRepeatedTestCase {

		@Test
		@Repeat
		@Timed(millis = 10000)
		public void defaultRepeatValue() throws Exception {
			incrementInvocationCount();
		}
	}

	public static final class NegativeRepeatValueRepeatedTestCase extends AbstractRepeatedTestCase {

		@Test
		@Repeat(-5)
		@Timed(millis = 10000)
		public void negativeRepeatValue() throws Exception {
			incrementInvocationCount();
		}
	}

	public static final class RepeatedFiveTimesRepeatedTestCase extends AbstractRepeatedTestCase {

		@Test
		@Repeat(5)
		public void repeatedFiveTimes() throws Exception {
			incrementInvocationCount();
		}
	}

	@Repeat(5)
	@Retention(RetentionPolicy.RUNTIME)
	private static @interface RepeatedFiveTimes {
	}

	public static final class RepeatedFiveTimesViaMetaAnnotationRepeatedTestCase extends AbstractRepeatedTestCase {

		@Test
		@RepeatedFiveTimes
		public void repeatedFiveTimes() throws Exception {
			incrementInvocationCount();
		}
	}

	/**
	 * Unit tests for claims raised in <a href="https://jira.spring.io/browse/SPR-6011" target="_blank">SPR-6011</a>.
	 */
	@Ignore("TestCase classes are run manually by the enclosing test class")
	public static final class TimedRepeatedTestCase extends AbstractRepeatedTestCase {

		@Test
		@Timed(millis = 1000)
		@Repeat(5)
		public void repeatedFiveTimesButDoesNotExceedTimeout() throws Exception {
			incrementInvocationCount();
		}

		@Test
		@Timed(millis = 10)
		@Repeat(1)
		public void singleRepetitionExceedsTimeout() throws Exception {
			incrementInvocationCount();
			Thread.sleep(15);
		}

		@Test
		@Timed(millis = 20)
		@Repeat(4)
		public void firstRepetitionOfManyExceedsTimeout() throws Exception {
			incrementInvocationCount();
			Thread.sleep(25);
		}

		@Test
		@Timed(millis = 100)
		@Repeat(10)
		public void collectiveRepetitionsExceedTimeout() throws Exception {
			incrementInvocationCount();
			Thread.sleep(11);
		}
	}

}
