BIND 10 #3056: MemorySegmentMappedTest.badAllocate fails when run as root user

[BIND 10 Development]

#3056: MemorySegmentMappedTest.badAllocate fails when run as root user
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            Reporter:  muks          |                        Owner:
                Type:  defect        |  UnAssigned
            Priority:  medium        |                       Status:
           Component:  data source   |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20130723
         Sub-Project:  DNS           |                   Resolution:
Estimated Difficulty:  0             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Description changed by muks:

Old description:

> `MemorySegmentMappedTest.badAllocate` sets the mode on the mapped file to
> 0444, and tries to re-open the mapped file (call indirectly to
> `growSegment()`).
>
> This test works in all cases except when the user running the test is
> `root`. `root` is able to write to a mode 0444 file.
>
> We should fix it so that this testcase is skipped when run as the `root`
> user.

New description:

 `MemorySegmentMappedTest.badAllocate` sets the mode on the mapped file to
 0444, and tries to re-open the mapped file for writing (call indirectly to
 `growSegment()`).

 This test works in all cases except when the user running the test is
 `root`. `root` is able to write to a mode 0444 file.

 We should fix it so that this testcase is skipped when run as the `root`
 user.

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Ticket URL: <http://bind10.isc.org/ticket/3056#comment:3>
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