added unit test for the fix

Author: Fred1155

.changes/next-release/bugfix-AWSQueryProtocol-1398d13.json

@@ -0,0 +1,6 @@
+{
+    "type": "bugfix",
+    "category": "AWS Query Protocol",
+    "contributor": "",
+    "description": "Fixed the bug that EC2 DescribeInstances query uses locale-dependent formatting"
+}

core/protocols/aws-query-protocol/src/test/java/software/amazon/awssdk/protocols/query/ListQueryMarshallerTest.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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 software.amazon.awssdk.protocols.query;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import org.junit.jupiter.api.Test;
+import software.amazon.awssdk.core.SdkField;
+import software.amazon.awssdk.core.protocol.MarshallLocation;
+import software.amazon.awssdk.core.protocol.MarshallingType;
+import software.amazon.awssdk.core.traits.ListTrait;
+import software.amazon.awssdk.core.traits.LocationTrait;
+import software.amazon.awssdk.http.SdkHttpFullRequest;
+import software.amazon.awssdk.protocols.query.internal.marshall.ListQueryMarshaller;
+import software.amazon.awssdk.protocols.query.internal.marshall.QueryMarshaller;
+import software.amazon.awssdk.protocols.query.internal.marshall.QueryMarshallerContext;
+import software.amazon.awssdk.protocols.query.internal.marshall.QueryMarshallerRegistry;
+
+
+public class ListQueryMarshallerTest {
+
+    @Test
+    public void localeSetAsNe_ParsedCorrectly() {
+        Locale defaultLocale = Locale.getDefault();
+        Locale.setDefault(new Locale("ne"));
+
+        ListQueryMarshaller marshaller = ListQueryMarshaller.ec2Query();
+
+        QueryMarshallerContext context = createTestContext();
+        List<String> testList = Arrays.asList("value1", "value2");
+        SdkField<List<?>> field = createTestField();
+
+        marshaller.marshall(context, "TestParam", testList, field);
+
+        Map<String, List<String>> params = context.request().rawQueryParameters();
+
+        assertEquals(Collections.singletonList("value1"), params.get("TestParam.1"));
+        assertEquals(Collections.singletonList("value2"), params.get("TestParam.2"));
+        Locale.setDefault(defaultLocale);
+    }
+
+    private QueryMarshallerContext createTestContext() {
+
+        QueryMarshaller<String> stringMarshaller = (context, path, val, field) ->
+            context.request().putRawQueryParameter(path, val);
+
+        QueryMarshallerRegistry registry = QueryMarshallerRegistry.builder()
+                                                                  .marshaller(MarshallingType.STRING, stringMarshaller)
+                                                                  .build();
+
+        return QueryMarshallerContext.builder()
+                                     .request(SdkHttpFullRequest.builder())
+                                     .marshallerRegistry(registry)
+                                     .build();
+    }
+
+
+
+    private SdkField<List<?>> createTestField() {
+        SdkField<?> memberField = SdkField.builder(MarshallingType.STRING)
+                                          .memberName("item")
+                                          .traits(LocationTrait.builder()
+                                                               .location(MarshallLocation.PAYLOAD)
+                                                               .locationName("item")
+                                                               .build())
+                                          .build();
+
+        ListTrait listTrait = ListTrait.builder()
+                                       .memberFieldInfo(memberField)
+                                       .memberLocationName("item")
+                                       .isFlattened(true)
+                                       .build();
+
+        return SdkField.builder(MarshallingType.LIST)
+                       .memberName("TestParam")
+                       .traits(LocationTrait.builder()
+                                            .location(MarshallLocation.QUERY_PARAM)
+                                            .locationName("TestParam")
+                                            .build(),listTrait)
+                       .build();
+    }
+}