Documenting trigger on changed folder GitLab

src/test/resources/org/jenkinsci/plugins/gwt/bdd/gitlab/gitlab-push-specific-folder.feature

@@ -0,0 +1,68 @@
+Feature: It should be possible to trigger for GitLab push events when specific files are changed.
+
+  Scenario: A build should be triggered when a commit is pushed to specific folder.
+
+    Given the following generic variables are configured:
+      | variable        | expression                                     | expressionType  | defaultValue | regexpFilter  |
+      | changed_files   | $.commits[*].['modified','added','removed'][*] | JSONPath        |              |               |
+
+    Given filter is configured with text: $changed_files
+    Given filter is configured with expression: .*"any/special/folder[^"]+?".*
+
+    When received post content is:
+    """
+    {
+      "commits": [
+        {
+          "added": ["added/file.txt"],
+          "modified": ["modified/file.txt"],
+          "removed": ["removed/file.txt"]
+        },
+        {
+          "added": [],
+          "modified": ["this/is/modified.txt"],
+          "removed": []
+        }
+      ]
+    }
+    """
+    Then the job is not triggered
+    Then variables are resolved to:
+      | variable         | value                                                                            |
+      | changed_files    | ["modified/file.txt","added/file.txt","removed/file.txt","this/is/modified.txt"] |
+
+
+    When received post content is:
+    """
+    {
+      "commits": [
+        {
+          "added": [],
+          "modified": ["any/special/folder/thefile.txt"],
+          "removed": []
+        }
+      ]
+    }
+    """
+    Then the job is triggered
+    Then variables are resolved to:
+      | variable         | value                              |
+      | changed_files    | ["any/special/folder/thefile.txt"] |
+
+
+    When received post content is:
+    """
+    {
+      "commits": [
+        {
+          "added": [],
+          "modified": ["any/not/special/folder/thefile.txt"],
+          "removed": []
+        }
+      ]
+    }
+    """
+    Then the job is not triggered
+    Then variables are resolved to:
+      | variable         | value                              |
+      | changed_files    | ["any/not/special/folder/thefile.txt"] |