Move to junit5 in all framework tests

- Just a migration
- Replace RedisRule with EnabledOnRedis
- Replace MongoDbRule with EnabledOnMongoDb
- spring-statemachine-test and some docs contains refs to junit4
  but those are support packages and will stay in place.
- Fixes #779
- Relates #771

spring-statemachine-data/redis/src/test/java/org/springframework/statemachine/data/redis/EnabledOnRedis.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2019 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
+ *
+ * https://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.statemachine.data.redis;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.junit.jupiter.api.extension.ExtendWith;
+
+@Target({ ElementType.TYPE, ElementType.METHOD })
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@ExtendWith(EnabledOnRedisCondition.class)
+public @interface EnabledOnRedis {
+}

spring-statemachine-data/redis/src/test/java/org/springframework/statemachine/data/redis/EnabledOnRedisCondition.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 the original author or authors.
+ * Copyright 2019 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.
@@ -15,38 +15,34 @@
  */
 package org.springframework.statemachine.data.redis;
 
-import org.junit.rules.TestRule;
-import org.junit.rules.TestWatcher;
-import org.junit.runner.Description;
-import org.junit.runners.model.Statement;
+import static org.junit.jupiter.api.extension.ConditionEvaluationResult.disabled;
+import static org.junit.jupiter.api.extension.ConditionEvaluationResult.enabled;
+
+import org.junit.jupiter.api.extension.ConditionEvaluationResult;
+import org.junit.jupiter.api.extension.ExecutionCondition;
+import org.junit.jupiter.api.extension.ExtensionContext;
 import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
 
-/**
- * Rule skipping tests if redis is not available from localhost with default settings.
- *
- * @author Janne Valkealahti
- *
- */
-public class RedisRule extends TestWatcher implements TestRule {
+public class EnabledOnRedisCondition implements ExecutionCondition {
+
+	static final ConditionEvaluationResult ENABLED_ON_REDIS = enabled("Redis found");
+
+	static final ConditionEvaluationResult DISABLED_ON_REDIS =	disabled("Redis not found");
 
 	@Override
-	public Statement apply(Statement base, Description description) {
+	public ConditionEvaluationResult evaluateExecutionCondition(ExtensionContext context) {
 		JedisConnectionFactory connectionFactory = null;
 		try {
 			connectionFactory = new JedisConnectionFactory();
 			connectionFactory.afterPropertiesSet();
 			connectionFactory.getConnection().close();
+			return ENABLED_ON_REDIS;
 		} catch (Exception e) {
-			return super.apply(new Statement() {
-				@Override
-				public void evaluate() throws Throwable {
-				}
-			}, Description.EMPTY);
 		} finally {
 			if (connectionFactory != null) {
 				connectionFactory.destroy();
 			}
 		}
-		return super.apply(base, description);
+		return DISABLED_ON_REDIS;
 	}
 }

spring-statemachine-data/redis/src/test/java/org/springframework/statemachine/data/redis/RedisRepositoryTests.java

@@ -25,8 +25,7 @@ import static org.springframework.statemachine.TestUtils.resolveMachine;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.junit.Rule;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
@@ -48,11 +47,9 @@ import org.springframework.statemachine.transition.TransitionKind;
  *
  * @author Janne Valkealahti
  */
+@EnabledOnRedis
 public class RedisRepositoryTests extends AbstractRepositoryTests {
 
-	@Rule
-	public RedisRule redisAvailableRule = new RedisRule();
-
 	@Override
 	protected void cleanInternal() {
 		AnnotationConfigApplicationContext c = new AnnotationConfigApplicationContext();