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Problem Report 0816 Details

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Report 0816 Actions

    Problem Report Number 0816
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0331
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published 1996-05-03 08:00
    Product Standard Commands and Utilities V2 (UNIX 95)
    Certification Program The Open Brand certification program
    Test Suite VSC version 4.1.5
    Test Identification POSIX.cmd/pax 181
    Problem Summary TSD4C.00180 This test may fail because the behaviour of tr string1 string2 is unspecified when string2 is shorter than string1.
    Problem Text
    This test may fail because the behaviour of "tr string1 string2"
    is unspecified when string2 is shorter than string1.

    The above test case fails because of change in behaviour of [:blank:]
    character class for POSIX.2 compliance

    In the following command in this test case

    file test_file1.in |tr -s '[:blank:]' ' ' |cut -d' ' -f2 >test_file.exp 2>/dev/null || RC=$?

    when 'tr' command is run [:blank:] character class will now expand into
    array containing two elements i.e, tab and a space(earlier [:blank:] character
    class contained only a space). Therefore in the above test case 'tr' will
    replace any space in the piped input to NULL, as a result of which all
    spaces between the fields in the input record will be replaced with null.
    Hence the file test_file.exp will contain the first field in the input
    record instead of the second field.

    Similar is the case in the following command too

    file test_dir/test_file1.in |tr -s '[:blank:]' ' ' |cut -d' ' -f2 >test_file.stdout 2>/dev/null || RC=$?

    Hence even in this case test_file.stdout will contain the first field of the
    input record instead of the second field.

    Thereafter, when diff is done on file test_file.stdout and test_file.exp

    diff test_file.exp test_file.stdout >/dev/null 2>/dev/null|| RC=$?

    it fails.

    In a way it can be said that there is a deficiency in the test case, because
    as per POSIX.2 [:blank:] character class specified as string1 with 'tr' will
    expand into array containing tab character at element 0 and space character
    at the element 1. Therefore the corressponding string2 should have two element,
    but in this case it has only one element i.e, one space character.
    Test Output
    --------------- pax

    ***********************************************************************
    /tset/POSIX.cmd/pax/pax.ex 1 Failed

    Test Information:
    Assertion #181 (A):
    -Assertion 181- Actual output is different from expected.

    ***********************************************************************

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    We agree this is a test suite deficiency in the test
    suite version(s) listed.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Test Suite Deficiency (TSD)
    Review Conclusion
    This is an agreed Test Suite Deficiency.

    Problem Reporting System Options:

     

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