API tests for capabilities endpoint

tests/acceptance/features/api/capabilities.feature

@@ -0,0 +1,48 @@
+Feature: get capabilities of the app
+
+  Scenario: Get capabilities when group folder app is enabled
+    When the administrator requests the nextcloud capabilities
+    Then the HTTP status code should be "200"
+    And the ocs data of the response should match
+    """"
+    {
+      "type": "object",
+      "required": [
+        "capabilities"
+      ],
+      "properties": {
+        "capabilities": {
+          "type": "object",
+          "required": [
+            "integration_openproject"
+          ],
+          "properties": {
+            "integration_openproject": {
+              "type": "object",
+              "required": [
+                "app_version",
+                "groupfolder_version",
+                "groupfolders_enabled"
+              ],
+              "properties": {
+                "app_version": {
+                  "type": "string",
+                  "pattern": "^\\d+\\.\\d+\\.\\d+$"
+                },
+                "groupfolder_version": {
+                  "type": "string",
+                  "pattern": "^\\d+\\.\\d+\\.\\d+$"
+                },
+                "groupfolders_enabled": {
+                  "type": "boolean",
+                  "enum": [
+                    true
+                  ]
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+    """

tests/acceptance/features/bootstrap/FeatureContext.php

@@ -914,6 +914,16 @@ public function theUserSendsARequestToTheEndpoint(
 		);
 	}
 
+	/**
+	 * @When the administrator requests the nextcloud capabilities
+	 *
+	 * @return void
+	 */
+	public function theAdministratorRequestsCapabilities(): void {
+		$this->response = $this->sendOCSRequest(
+			'/cloud/capabilities', 'GET', $this->getAdminUsername()
+		);
+	}
 
 	/**
 	 * @Then /^the content of file at "([^"]*)" for user "([^"]*)" should be "([^"]*)"$/