changes needed due to 3c91978d36

add posibility to inspect availability of a resource in a pool (testing only)
allow access to internal connection pool of db (testing only)

src/db/database.cr

@@ -16,6 +16,8 @@ module DB
   class Database
     # :nodoc:
     getter driver
+    # :nodoc:
+    getter pool
 
     # Returns the uri with the connection settings to the database
     getter uri

src/db/pool.cr

@@ -53,6 +53,11 @@ module DB
       end
     end
 
+    # :nodon:
+    def is_available?(resource : T)
+      @available.includes?(resource)
+    end
+
     private def build_resource : T
       resource = @factory.call
       @total << resource