More failure percentage configuration.

config/vufind/Demo.ini

@@ -50,8 +50,11 @@ cancelHolds = 50
 cancelILLRequests = 50
 cancelStorageRetrievalRequests = 50
 changePassword = 33
+checkILLRequestBlock = 10
 checkILLRequestIsValid = 10
+checkRequestBlock = 10
 checkRequestIsValid = 10
+checkStorageRetrievalRequestBlock = 10
 checkStorageRetrievalRequestIsValid = 10
 getDefaultRequestGroup = 50
 getHoldDefaultRequiredDate = 50

module/VuFind/src/VuFind/ILS/Driver/Demo.php

@@ -252,6 +252,36 @@ class Demo extends AbstractBase
             ? $this->config['Records']['source'] : DEFAULT_SEARCH_BACKEND;
     }
 
+    /**
+     * Are holds/recalls blocked?
+     *
+     * @return bool
+     */
+    protected function checkRequestBlock()
+    {
+        return $this->isFailing(__METHOD__, 10);
+    }
+
+    /**
+     * Are ILL requests blocked?
+     *
+     * @return bool
+     */
+    protected function checkILLRequestBlock()
+    {
+        return $this->isFailing(__METHOD__, 10);
+    }
+
+    /**
+     * Are storage retrieval requests blocked?
+     *
+     * @return bool
+     */
+    protected function checkStorageRetrievalRequestBlock()
+    {
+        return $this->isFailing(__METHOD__, 10);
+    }
+
     /**
      * Generates a random, fake holding array
      *
@@ -280,16 +310,16 @@ class Demo extends AbstractBase
             'callnumber'   => $this->getFakeCallNum(),
             'duedate'      => '',
             'is_holdable'  => true,
-            'addLink'      => $patron ? rand() % 10 == 0 ? 'block' : true : false,
+            'addLink'      => $patron
+                ? $this->checkRequestBlock() ? 'block' : true : false,
             'level'        => 'copy',
             'storageRetrievalRequest' => 'auto',
             'addStorageRetrievalRequestLink' => $patron
-                ? rand() % 10 == 0 ? 'block' : 'check'
+                ? $this->checkStorageRetrievalRequestBlock() ? 'block' : 'check'
                 : false,
             'ILLRequest'   => 'auto',
             'addILLRequestLink' => $patron
-                ? rand() % 10 == 0 ? 'block' : 'check'
-                : false
+                ? $this->checkILLRequestBlock() ? 'block' : 'check' : false
         ];
     }