kingswanwho commented on code in PR #2499:
URL: https://github.com/apache/drill/pull/2499#discussion_r1097151371


##########
exec/java-exec/src/test/java/org/apache/drill/test/ClusterTest.java:
##########
@@ -125,4 +132,56 @@ public static void run(String query, Object... args) 
throws Exception {
   public QueryBuilder queryBuilder( ) {
     return client.queryBuilder();
   }
+
+  /**
+   * Utility method which tests given query produces a {@link UserException} 
and the exception message contains
+   * the given message.
+   * @param testSqlQuery Test query
+   * @param expectedErrorMsg Expected error message.
+   */
+  protected static void errorMsgTestHelper(String testSqlQuery, String 
expectedErrorMsg) throws Exception {
+    try {
+      run(testSqlQuery);
+      fail("Expected a UserException when running " + testSqlQuery);
+    } catch (UserException actualException) {
+      try {
+        assertThat("message of UserException when running " + testSqlQuery, 
actualException.getMessage(), containsString(expectedErrorMsg));
+      } catch (AssertionError e) {
+        e.addSuppressed(actualException);
+        throw e;
+      }
+    }
+  }
+
+  protected static void updateClient(Properties properties) {
+    if (client != null) {
+      client.close();
+      client = null;
+    }
+    ClientFixture.ClientBuilder clientBuilder = cluster.clientBuilder();
+    if (properties != null) {
+      for (final String key : properties.stringPropertyNames()) {
+        final String lowerCaseKey = key.toLowerCase();
+        clientBuilder.property(lowerCaseKey, properties.getProperty(key));
+      }
+    }
+    client = clientBuilder.build();
+  }
+
+  protected static void updateClient(final String user) {
+    updateClient(user, null);
+  }
+
+  protected static void updateClient(final String user, final String password) 
{
+    if (client != null) {
+      client.close();
+      client = null;
+    }
+    final Properties properties = new Properties();
+    properties.setProperty(DrillProperties.USER, user);
+    if (password != null) {
+      properties.setProperty(DrillProperties.PASSWORD, password);
+    }
+    updateClient(properties);
+  }

Review Comment:
   Hi James, I pushed a new commit which refactor updateClient from ClusterTest 
to ClientFixture.



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