1 files changed, 34 insertions, 0 deletions
diff --git a/lib/gitlab/ci/config/node/null.rb b/lib/gitlab/ci/config/node/null.rb
new file mode 100644
index 00000000000..88a5f53f13c
--- /dev/null
+++ b/lib/gitlab/ci/config/node/null.rb
@@ -0,0 +1,34 @@
+module Gitlab
+  module Ci
+    class Config
+      module Node
+        ##
+        # This class represents an undefined node.
+        #
+        # Implements the Null Object pattern.
+        #
+        class Null < Entry
+          def value
+            nil
+          end
+
+          def valid?
+            true
+          end
+
+          def errors
+            []
+          end
+
+          def specified?
+            false
+          end
+
+          def relevant?
+            false
+          end
+        end
+      end
+    end
+  end
+end