Update mocking-dependency.rst (#7)

* Update mocking-dependency.rst

updated the docs "access the mock data from test area"

* Update mocking-dependency.rst

Co-authored-by: Tibor Kotosz <tkotosz@inviqa.com>

Author: sprabhakar96

docs/guide/usage/mocking-dependency.rst

@@ -176,6 +176,25 @@ E.g.:
         }
     }
 
+**behat.yml:**
+In order to load this custom DI configuration during the test run the test area need to be configured in the Behat test suite so it can load to merge it with the default area.
+
+.. code-block:: yaml
+
+    default:
+      suites:
+        yoursuite:
+          autowire: true
+          
+          contexts:
+            - YourContext
+          
+          services: '@bex.magento2_extension.service_container'
+          
+          magento:
+            area: test
+
+
 **Feature:**
 
 .. code-block:: gherkin