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Description
Add tests for owncloud/core#25789
Steps are here owncloud/core#25557 (comment).
On v9.1.0 they would fail with a 500 Internal Server Error.
On v9.1.1 they would pass, so the curl / get / download would return success.
Note that the curl command can be replaced by a PROPFIND or anything that would trigger a FS setup for the user.