test(coreApiWebdavUploadTUS): assert etag and permissions on the finalizing TUS chunk

The chunked TUS finalize returns OC-ETag, ETag and OC-Perm since
opencloud-eu/reva#718, so a client no longer needs a follow-up PROPFIND
for the new etag and permissions. Add a scenario asserting these headers
on the finalizing chunk, reusing existing step definitions (the etag is a
dynamic quoted hash, hence the header-regex assertion).

Verified locally red->green: red on stock (headers absent), green on an
opencloud built on reva-with-opencloud-eu#718, on posix and decomposed.

opencloud-eu#2409

Author: michaelstingl

tests/acceptance/features/coreApiWebdavUploadTUS/lowLevelUpload.feature

@@ -90,3 +90,23 @@ Feature: low level tests for upload of chunks
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+  @issue-2409
+  Scenario Outline: finalize a chunked upload and get the etag and permissions
+    Given using <dav-path-version> DAV path
+    And user "Alice" has created a new TUS resource on the WebDAV API with these headers:
+      | Upload-Length   | 10                    |
+      #    ZmlsZS50eHQ= is the base64 encode of file.txt
+      | Upload-Metadata | filename ZmlsZS50eHQ= |
+    When user "Alice" sends a chunk to the last created TUS Location with offset "0" and data "123" using the WebDAV API
+    And user "Alice" sends a chunk to the last created TUS Location with offset "3" and data "4567890" using the WebDAV API
+    Then the HTTP status code should be "204"
+    And the following headers should match these regular expressions
+      | OC-ETag | /^"[^"]*"$/   |
+      | ETag    | /^"[^"]*"$/   |
+      | OC-Perm | /^[A-Za-z]+$/ |
+    Examples:
+      | dav-path-version |
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+      | spaces           |