HSEARCH-1270 Test outer transaction flush nested flush and rollback

integrationtest/showcase/library/src/test/java/org/hibernate/search/integrationtest/showcase/library/LibraryShowcaseTransactionIT.java

@@ -56,4 +56,22 @@ public void innerTransactionRollback() {
 		// Check that inner transaction data has NOT been pushed to the index:
 		assertFalse( innerBook.isPresent() );
 	}
+
+	@Test
+	@TestForIssue( jiraKey = "HSEARCH-1270" )
+	public void innerTransactionRollback_flushBeforeInner() {
+		String outerIsbn = "0-4206-9749-7";
+		String innerIsbn = "0-1111-9749-7";
+
+		innerTransactionRollbackService.doOuterFlushBeforeInner( outerIsbn, innerIsbn );
+
+		Optional<Book> outerBook = documentService.getByIsbn( outerIsbn );
+		Optional<Book> innerBook = documentService.getByIsbn( innerIsbn );
+
+		// Check that outer transaction data has been pushed to the index:
+		assertTrue( outerBook.isPresent() );
+
+		// Check that inner transaction data has NOT been pushed to the index:
+		assertFalse( innerBook.isPresent() );
+	}
 }

integrationtest/showcase/library/src/test/java/org/hibernate/search/integrationtest/showcase/library/service/InnerTransactionRollbackService.java

@@ -64,6 +64,23 @@ public void doOuter(String outerIsbn, String nestedIsbn) {
 		entityManager.flush();
 	}
 
+	public void doOuterFlushBeforeInner(String outerIsbn, String nestedIsbn) {
+		// This data is supposed to be pushed to the index:
+		Book book = new Book( 739, outerIsbn, "The Late Mattia Pascal", "Luigi Pirandello", "Describes the human life conditions...", "misfortune" );
+		entityManager.persist( book );
+
+		// flush before the execution of the inner transaction
+		entityManager.flush();
+
+		try {
+			self.doInner( nestedIsbn );
+		}
+		catch (MakeRollbackException e) {
+			// Do not rollback the outer transaction
+		}
+		entityManager.flush();
+	}
+
 	private static class MakeRollbackException extends RuntimeException {
 		public MakeRollbackException(String message) {
 			super( message );