DATACMNS-959 - RepositoryFactorySupport now registers interceptor to detect transactions.

The interceptor discovers whether a transaction was running before the call entered the repository proxy and exposes that fact via ….isSurroundingTransactionActive() for donwstream usage.

Related ticket: DATAJPA-1023.

src/test/java/org/springframework/data/repository/core/support/SurroundingTransactionDetectorMethodInterceptorUnitTests.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2016 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.data.repository.core.support;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+import static org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.*;
+
+import org.junit.Test;
+import org.springframework.aop.framework.ReflectiveMethodInvocation;
+import org.springframework.transaction.support.TransactionSynchronizationManager;
+
+/**
+ * Unit tests for {@link SurroundingTransactionDetectorMethodInterceptor}.
+ * 
+ * @author Oliver Gierke
+ * @soundtrack Hendrik Freischlader Trio - Openness (Openness)
+ */
+public class SurroundingTransactionDetectorMethodInterceptorUnitTests {
+
+	/**
+	 * @see DATACMNS-959
+	 */
+	@Test
+	public void registersActiveSurroundingTransaction() throws Throwable {
+
+		TransactionSynchronizationManager.setActualTransactionActive(true);
+
+		INSTANCE.invoke(new StubMethodInvocation(true));
+	}
+
+	/**
+	 * @see DATACMNS-959
+	 */
+	@Test
+	public void registersNoSurroundingTransaction() throws Throwable {
+
+		TransactionSynchronizationManager.setActualTransactionActive(false);
+
+		INSTANCE.invoke(new StubMethodInvocation(false));
+	}
+
+	static class StubMethodInvocation extends ReflectiveMethodInvocation {
+
+		boolean transactionActive;
+
+		StubMethodInvocation(boolean expectTransactionActive) throws Exception {
+			super(null, null, Object.class.getMethod("toString"), null, null, null);
+			this.transactionActive = expectTransactionActive;
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.aopalliance.intercept.Joinpoint#proceed()
+		 */
+		public Object proceed() throws Throwable {
+
+			assertThat(INSTANCE.isSurroundingTransactionActive(), is(transactionActive));
+
+			return null;
+		}
+	}
+}