[jira] [Created] (MESOS-3848) Refactor Environment::mkdtemp into TemporaryDirectoryTest.

["Joseph Wu (JIRA)" <ji...@apache.org>]

Joseph Wu created MESOS-3848:
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             Summary: Refactor Environment::mkdtemp into TemporaryDirectoryTest.
                 Key: MESOS-3848
                 URL: https://issues.apache.org/jira/browse/MESOS-3848
             Project: Mesos
          Issue Type: Task
          Components: test
            Reporter: Joseph Wu
            Assignee: Joseph Wu
            Priority: Minor


As part of [MESOS-3762], many tests were changed from one {{TemporaryDirectoryTest}} to another {{TemporaryDirectoryTest}}.  One subtle difference is that the name of the temporary directory no longer contains the name of the test.  In [MESOS-3847], the duplicate {{TemporaryDirectoryTest}} was removed.

The original {{TemporaryDirectoryTest}} called [{{environment->mkdtemp}}|https://github.com/apache/mesos/blob/master/src/tests/environment.cpp#L494].  We would like the naming, which is valuable for debugging, to be available for a majority of tests.  (A majority of tests inherit from {{TemporaryDirectoryTest}} in some way.)

Note:
* Any additional directories created via {{environment->mkdtemp}} are cleaned up after the test.
* We don't want mesos-specific logic in Stout, like the {{umount}} shell command in {{Environment::TearDown}}.

*Proposed change:*
Move the temporary directory logic from {{Environment::mkdtemp}} to {{TemporaryDirectoryTest}}.

*Tests that need to change*
| {{log_tests.cpp}} | {{LogZooKeeperTest}} | We can change {{ZooKeeperTest}} to inherit from {{TemporaryDirectoryTest}} to get rid of code duplication |
| {{tests/mesos.cpp}} | {{MesosTest::CreateSlaveFlags}} | {{MesosTest}} already inherits from {{TemporaryDirectoryTest}}. |
| {{tests/script.hpp}} | {{TEST_SCRIPT}} | This is used for the {{ExampleTests}}.  We can define a test class that inherits appropriately. |
| {{docker_tests.cpp}} | {{*}} | Already inherits from {{MesosTest}}. |



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