[GitHub] [flink] twalthr commented on a change in pull request #12228: [FLINK-17541][table] Support inline structured types

[GitBox <gi...@apache.org>]

twalthr commented on a change in pull request #12228:
URL: https://github.com/apache/flink/pull/12228#discussion_r427245994



##########
File path: flink-table/flink-table-common/src/test/java/org/apache/flink/table/types/utils/DataTypeUtilsTest.java
##########
@@ -42,12 +43,24 @@
 import static org.apache.flink.table.api.DataTypes.STRING;
 import static org.apache.flink.table.api.DataTypes.TIMESTAMP;
 import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
 
 /**
  * Tests for {@link DataTypeUtils}.
  */
 public class DataTypeUtilsTest {
+
+	@Test
+	public void testIsInternalClass() {
+		assertTrue(DataTypeUtils.isInternal(DataTypes.INT()));
+		assertTrue(DataTypeUtils.isInternal(DataTypes.INT().notNull().bridgedTo(int.class)));
+		assertTrue(DataTypeUtils.isInternal(DataTypes.ROW().bridgedTo(RowData.class)));
+		assertTrue(DataTypeUtils.isInternal(DataTypes.ROW().bridgedTo(RowData.class)));

Review comment:
       I wanted to test a regular `Row`




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