More parallel UI tests (#24449)

* Split UI tests into more parts

* Use UITestFixture as it requires the overlay site to be set up

Author: sgiehl

.github/workflows/matomo-tests.yml

@@ -136,7 +136,7 @@ jobs:
     strategy:
       fail-fast: ${{ inputs.is_preview == true }}
       matrix:
-        parts: [ 0,1,2,3 ]
+        parts: [ 0,1,2,3,4,5,6,7,8,9 ]
     steps:
       - uses: actions/checkout@v6
         with:
@@ -148,7 +148,7 @@ jobs:
       - name: running tests
         uses: matomo-org/github-action-tests@main
         with:
-          ui-test-options: '--num-test-groups=4 --test-group=${{ matrix.parts }}'
+          ui-test-options: '--num-test-groups=10 --test-group=${{ matrix.parts }}'
           test-type: 'UI'
           php-version: '7.2'
           node-version: '16'

tests/UI/specs/OptOutIframe_spec.js

@@ -8,8 +8,6 @@
  */
 
 describe("OptOutIframe", function () {
-    this.fixture = "Piwik\\Tests\\Fixtures\\OneVisit";
-
     const siteUrl = "/tests/resources/overlay-test-site-real/opt-out.php?implementation=iframe",
         safariUserAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.75.14 (KHTML, like Gecko) Version/7.0.3 Safari/7046A194A",
         chromeUserAgent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36";