kingswanwho commented on code in PR #2499:
URL: https://github.com/apache/drill/pull/2499#discussion_r968518305


##########
exec/java-exec/src/test/java/org/apache/drill/exec/impersonation/TestInboundImpersonation.java:
##########
@@ -156,22 +159,25 @@ public void unauthorizedTarget() throws Exception {
 
   @Test
   public void invalidPolicy() throws Exception {
-    thrownException.expect(new 
UserExceptionMatcher(UserBitShared.DrillPBError.ErrorType.VALIDATION,
-        "Invalid impersonation policies."));
+    String query = "ALTER SYSTEM SET `%s`='%s'";

Review Comment:
   Hi James, the **_client_** here inherits from BaseTestQuery, which is 
DrillClient but not ClientFixture in TestLargeFileCompilation as Paul 
suggested. DrillClient doesn't have method like client.alterSystem(). 
BaseTestQuery is deprecated actually, but not marked as deprecated because it 
is still widely used. The best choice here I think is change base test class 
from BaseTestQuery to ClusterTest so that we could use client.alterSystem() for 
clean and compact code style. However there are multiple Inheritance levels 
here, which are TestInboundImpersonation -> BaseTestImpersonation -> 
PlanTestBase -> BaseTestQuery. Due to that PlanTestBase involves many classes. 
Maybe change BaseTestImpersonation inheritance from PlanTestBase to ClusterTest 
directly is an easier way.



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