Add CoroutinesAnnotationTransactionInterceptorTests

suspendingValueSuccess() currently fails due to an
unexpected rollback on transactional suspending functions
returning a value.

See gh-25998

Author: sdeleuze

spring-tx/src/test/kotlin/org/springframework/transaction/annotation/CoroutinesAnnotationTransactionInterceptorTests.kt

@@ -0,0 +1,117 @@
+package org.springframework.transaction.annotation
+
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.runBlocking
+import org.assertj.core.api.Assertions
+import org.junit.jupiter.api.Disabled
+import org.junit.jupiter.api.Test
+import org.springframework.aop.framework.ProxyFactory
+import org.springframework.transaction.TransactionManager
+import org.springframework.transaction.interceptor.TransactionInterceptor
+import org.springframework.transaction.testfixture.CallCountingTransactionManager
+import org.springframework.transaction.testfixture.ReactiveCallCountingTransactionManager
+
+class CoroutinesAnnotationTransactionInterceptorTests {
+
+	private val ptm = CallCountingTransactionManager()
+
+	private val rtm = ReactiveCallCountingTransactionManager()
+
+	private val source = AnnotationTransactionAttributeSource()
+
+	private val ti = TransactionInterceptor((ptm as TransactionManager), source)
+
+	@Test
+	fun suspendingNoValueSuccess() {
+		val proxyFactory = ProxyFactory()
+		proxyFactory.setTarget(TestWithCoroutines())
+		proxyFactory.addAdvice(TransactionInterceptor(rtm, source))
+		val proxy = proxyFactory.proxy as TestWithCoroutines
+		runBlocking {
+			proxy.suspendingNoValueSuccess()
+		}
+		assertReactiveGetTransactionAndCommitCount(1)
+	}
+
+	@Test
+	fun suspendingNoValueFailure() {
+		val proxyFactory = ProxyFactory()
+		proxyFactory.setTarget(TestWithCoroutines())
+		proxyFactory.addAdvice(TransactionInterceptor(rtm, source))
+		val proxy = proxyFactory.proxy as TestWithCoroutines
+		runBlocking {
+			try {
+				proxy.suspendingNoValueFailure()
+			}
+			catch (ex: IllegalStateException) {
+			}
+
+		}
+		assertReactiveGetTransactionAndRollbackCount(1)
+	}
+
+	@Test
+	@Disabled("Currently fails due to gh-25998")
+	fun suspendingValueSuccess() {
+		val proxyFactory = ProxyFactory()
+		proxyFactory.setTarget(TestWithCoroutines())
+		proxyFactory.addAdvice(TransactionInterceptor(rtm, source))
+		val proxy = proxyFactory.proxy as TestWithCoroutines
+		runBlocking {
+			Assertions.assertThat(proxy.suspendingValueSuccess()).isEqualTo("foo")
+		}
+		assertReactiveGetTransactionAndCommitCount(1)
+	}
+
+	@Test
+	fun suspendingValueFailure() {
+		val proxyFactory = ProxyFactory()
+		proxyFactory.setTarget(TestWithCoroutines())
+		proxyFactory.addAdvice(TransactionInterceptor(rtm, source))
+		val proxy = proxyFactory.proxy as TestWithCoroutines
+		runBlocking {
+			try {
+				proxy.suspendingValueFailure()
+			}
+			catch (ex: IllegalStateException) {
+			}
+
+		}
+		assertReactiveGetTransactionAndRollbackCount(1)
+	}
+
+
+
+	private fun assertReactiveGetTransactionAndCommitCount(expectedCount: Int) {
+		Assertions.assertThat(rtm.begun).isEqualTo(expectedCount)
+		Assertions.assertThat(rtm.commits).isEqualTo(expectedCount)
+	}
+
+	private fun assertReactiveGetTransactionAndRollbackCount(expectedCount: Int) {
+		Assertions.assertThat(rtm.begun).isEqualTo(expectedCount)
+		Assertions.assertThat(rtm.rollbacks).isEqualTo(expectedCount)
+	}
+
+	@Transactional
+	open class TestWithCoroutines {
+
+		open suspend fun suspendingNoValueSuccess() {
+			delay(10)
+		}
+
+		open suspend fun suspendingNoValueFailure() {
+			delay(10)
+			throw IllegalStateException()
+		}
+
+		open suspend fun suspendingValueSuccess(): String {
+			delay(10)
+			return "foo"
+		}
+
+		open suspend fun suspendingValueFailure(): String {
+			delay(10)
+			throw IllegalStateException()
+		}
+	}
+}