DATAJDBC-229 Added test demonstrating java.util.UUID is not a simple type.

Original pull request: #76.

src/test/java/org/springframework/data/relational/core/mapping/RelationalMappingContextUnitTests.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2018 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.relational.core.mapping;
+
+import static org.assertj.core.api.Assertions.*;
+
+import java.util.UUID;
+
+import org.junit.Test;
+import org.springframework.data.annotation.Id;
+
+/**
+ * Unit tests for {@link RelationalMappingContext}.
+ *
+ * @author Toshiaki Maki
+ */
+public class RelationalMappingContextUnitTests {
+
+	@Test // DATAJDBC-229
+	public void uuidPropertyIsNotEntity() {
+
+		RelationalMappingContext mappingContext = new RelationalMappingContext();
+		RelationalPersistentEntity<?> entity = mappingContext.getPersistentEntity(EntityWithUuid.class);
+		RelationalPersistentProperty uuidProperty = entity.getRequiredPersistentProperty("uuid");
+		assertThat(uuidProperty.isEntity()).isFalse();
+	}
+
+	static class EntityWithUuid {
+		@Id UUID uuid;
+	}
+}