feat: add null check for batchManager in BatchingSqsClientAdapter constructor

Author: khc41

spring-cloud-aws-sqs/src/main/java/io/awspring/cloud/sqs/operations/BatchingSqsClientAdapter.java

@@ -11,6 +11,7 @@ public class BatchingSqsClientAdapter implements SqsAsyncClient {
 	private final SqsAsyncBatchManager batchManager;
 
 	public BatchingSqsClientAdapter(SqsAsyncBatchManager batchManager) {
+		Assert.notNull(batchManager, "batchManager cannot be null");
 		this.batchManager = batchManager;
 	}
 

spring-cloud-aws-sqs/src/test/java/io/awspring/cloud/sqs/operations/BatchingSqsClientAdapterTests.java

@@ -29,6 +29,7 @@
 import java.util.function.Consumer;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.BDDMockito.then;
@@ -49,6 +50,13 @@ void beforeEach() {
         mockAdapter = new BatchingSqsClientAdapter(mockBatchManager);
     }
 
+    @Test
+    void shouldThrowExceptionWhenBatchManagerIsNull() {
+        assertThatThrownBy(() -> new BatchingSqsClientAdapter(null))
+                .isInstanceOf(IllegalArgumentException.class)
+                .hasMessage("batchManager cannot be null");
+    }
+
     @Test
     void shouldReturnCorrectServiceName() {
         String serviceName = mockAdapter.serviceName();