Github user fhueske commented on a diff in the pull request: https://github.com/apache/flink/pull/5218#discussion_r159128322 --- Diff: flink-java/src/test/java/org/apache/flink/api/java/io/RowCsvInputFormatTest.java --- @@ -61,6 +62,84 @@ private static final String FIRST_PART = "That is the first part"; private static final String SECOND_PART = "That is the second part"; + @Test + public void testNullValueWithoutTrailingDelimiter() throws Exception { --- End diff -- We should test the individual parsers by extending `ParserTestBase` with tests that check for correct empty field behavior (EMPTY_COLUMN error state) with and without a following delimiter. IMO, the null field behavior of `RowCsvInputFormat` is sufficiently tested by `RowCsvInputFormatTest.testEmptyFields()` such that this test does not need to be extended.
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