Refactor tst_QFiledialog::clearLineEdit()

The test had some shortcomings:
- Flakyness due to not waiting for the file dialog list
  to be populated.
- It assumed that the hardcoded directory name
  ____aaaa... always would show first in the list. This may
  not be true on Windows, where names like .designer show above.
- On failure, the test directory would leak.

This manifested in failures like:

FAIL!  : tst_QFiledialog::clearLineEdit() '(fd.directory().absolutePath() != QDir::home().absolutePath())' returned FALSE. ()

To fix this, use QTemporaryDir and introduce predicates that
can be used to check whether the dialog has been populated
and the right file/directory is selected by pressing cursor down.
Use the temporary directory as not to pollute the home directory.

Change-Id: Ic504b91325993dcd6099c99e125e7ed8ff1d7672
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: David Faure <david.faure@kdab.com>

0 files changed, 0 insertions, 0 deletions