jackye1995 commented on code in PR #7066:
URL: https://github.com/apache/iceberg/pull/7066#discussion_r1139271269


##########
aws/src/test/java/org/apache/iceberg/aws/TestAwsClientFactories.java:
##########
@@ -132,6 +136,41 @@ public void 
testLakeFormationAwsClientFactorySerializable() throws IOException {
         .isInstanceOf(LakeFormationAwsClientFactory.class);
   }
 
+  @Test
+  public void testDefaultAwsClientFactoryWithCredentialsProvider() {
+    Map<String, String> properties = Maps.newHashMap();
+    properties.put(AwsProperties.AWS_REGION, Region.AWS_GLOBAL.toString());
+    properties.put(
+        AwsProperties.S3FILEIO_CREDENTIALS_PROVIDER,
+        SystemPropertyCredentialsProvider.class.getName());

Review Comment:
   +1 for making a fake class for this. See examples like 
https://github.com/apache/iceberg/blob/master/core/src/test/java/org/apache/iceberg/TestLocationProvider.java#L185
   
   And do we need `Class.forName`? I think it will naturally throw 
ClassNotFound in `DynMethods`



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