Move inner test classes to top-level classes to run these by the Maven build.

Original Pull Request: #2253

src/test/java/org/springframework/data/redis/mapping/FlatteningJackson2HashMapperUnitTests.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2022 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.data.redis.mapping;
+
+import org.springframework.data.redis.hash.Jackson2HashMapper;
+
+/**
+ * @author Mark Paluch
+ */
+public class FlatteningJackson2HashMapperUnitTests extends Jackson2HashMapperUnitTests {
+	FlatteningJackson2HashMapperUnitTests() {
+		super(new Jackson2HashMapper(true));
+	}
+}

src/test/java/org/springframework/data/redis/mapping/Jackson2HashMapperUnitTests.java

@@ -42,7 +42,7 @@ import org.springframework.data.redis.hash.Jackson2HashMapper;
  * @author Christoph Strobl
  * @author Mark Paluch
  */
-public abstract class Jackson2HashMapperUnitTests extends AbstractHashMapperTests {
+abstract class Jackson2HashMapperUnitTests extends AbstractHashMapperTests {
 
 	private final Jackson2HashMapper mapper;
 
@@ -50,19 +50,6 @@ public abstract class Jackson2HashMapperUnitTests extends AbstractHashMapperTest
 		this.mapper = mapper;
 	}
 
-	public static class FlatteningJackson2HashMapperUnitTests extends Jackson2HashMapperUnitTests {
-		FlatteningJackson2HashMapperUnitTests() {
-			super(new Jackson2HashMapper(true));
-		}
-	}
-
-	public static class NonFlatteningJackson2HashMapperUnitTests extends Jackson2HashMapperUnitTests {
-
-		NonFlatteningJackson2HashMapperUnitTests() {
-			super(new Jackson2HashMapper(false));
-		}
-	}
-
 	@Override
 	@SuppressWarnings("rawtypes")
 	protected <T> HashMapper mapperFor(Class<T> t) {

src/test/java/org/springframework/data/redis/mapping/NonFlatteningJackson2HashMapperUnitTests.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2022 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.data.redis.mapping;
+
+import org.springframework.data.redis.hash.Jackson2HashMapper;
+
+/**
+ * @author Mark Paluch
+ */
+public class NonFlatteningJackson2HashMapperUnitTests extends Jackson2HashMapperUnitTests {
+
+	NonFlatteningJackson2HashMapperUnitTests() {
+		super(new Jackson2HashMapper(false));
+	}
+}