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https://issues.apache.org/jira/browse/IMPALA-12311?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fang-Yu Rao resolved IMPALA-12311.
----------------------------------
Resolution: Fixed
Resolve the issue since the fix has been merged.
> Extra newlines are produced when an end-to-end test is run with
> update_results
> -------------------------------------------------------------------------------
>
> Key: IMPALA-12311
> URL: https://issues.apache.org/jira/browse/IMPALA-12311
> Project: IMPALA
> Issue Type: Bug
> Affects Versions: Impala 4.1.2
> Reporter: Fang-Yu Rao
> Assignee: Fang-Yu Rao
> Priority: Minor
> Labels: test-infra
>
> We found that extra newlines are produced in the updated golden file when the
> actual results do not match the expected results specified in the original
> golden file.
> Take
> [TestDecimalExprs::test_exprs()|https://github.com/apache/impala/blob/master/tests/query_test/test_decimal_queries.py#L75]
> for example, this test runs the test cases in
> [decimal-exprs.test|https://github.com/apache/impala/blob/master/testdata/workloads/functional-query/queries/QueryTest/decimal-exprs.test].
> Suppose that we modify the expected error message at
> [https://github.com/apache/impala/blob/master/testdata/workloads/functional-query/queries/QueryTest/decimal-exprs.test#L107]
> from "UDF WARNING: Decimal expression overflowed, returning NULL" to the
> following (the original string with an additional "x").
> {noformat}
> UDF WARNING: Decimal expression overflowed, returning NULLx
> {noformat}
> Then we run this test using the following command with the command line
> argument '--update_results'.
> {code:java}
> $IMPALA_HOME/bin/impala-py.test \
> --update_results \
> --junitxml=$IMPALA_EE_TEST_LOGS_DIR/results/test_decimal.xml \
> $IMPALA_HOME/tests/query_test/test_decimal_queries.py::TestDecimalExprs::test_exprs
> {code}
> In $IMPALA_HOME/logs/ee_tests/QueryTest_decimal-exprs.test, we will find that
> the following subsection corresponding to the query. There are 3 additional
> newlines in the subsection of 'ERRORS'.
> {noformat}
> ---- ERRORS
> UDF WARNING: Decimal expression overflowed, returning NULL
> ====
> {noformat}
> One of the newlines was produced in
> [join_section_lines()|https://github.com/apache/impala/blob/master/tests/util/test_file_parser.py#L298].
> This function is called when the actual results do not match the expected
> results in the following 4 places.
> # [test_section['ERRORS'] =
> join_section_lines(actual_errors)|https://github.com/apache/impala/blob/master/tests/common/test_result_verifier.py#L398].
> # [test_section['TYPES'] = join_section_lines(\[',
> '.join(actual_types)\])|https://github.com/apache/impala/blob/master/tests/common/test_result_verifier.py#L429].
> # [test_section['LABELS'] = join_section_lines(\[',
> '.join(actual_labels)\])|https://github.com/apache/impala/blob/master/tests/common/test_result_verifier.py#L451].
> # [test_section[result_section] =
> join_section_lines(actual.result_list)|https://github.com/apache/impala/blob/master/tests/common/test_result_verifier.py#L489].
> Thus, we also have the same issue for subsections like TYPES, LABELS, and
> RESULTS in such a scenario (actual results do not match expected ones). It
> would be good if a user/developer does not have to manually remove those
> extra newlines when trying to generate the golden files for new test files.
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