1 files changed, 52 insertions, 0 deletions
diff --git a/qa/qa/page/validator.rb b/qa/qa/page/validator.rb
new file mode 100644
index 00000000000..117d8d4db67
--- /dev/null
+++ b/qa/qa/page/validator.rb
@@ -0,0 +1,52 @@
+module QA
+  module Page
+    class Validator
+      ValidationError = Class.new(StandardError)
+
+      Error = Struct.new(:page, :message) do
+        def to_s
+          "Error: #{page} - #{message}"
+        end
+      end
+
+      def initialize(constant)
+        @module = constant
+      end
+
+      def constants
+        @consts ||= @module.constants.map do |const|
+          @module.const_get(const)
+        end
+      end
+
+      def descendants
+        @descendants ||= constants.map do |const|
+          case const
+          when Class
+            const if const < Page::Base
+          when Module
+            Page::Validator.new(const).descendants
+          end
+        end
+
+        @descendants.flatten.compact
+      end
+
+      def errors
+        [].tap do |errors|
+          descendants.each do |page|
+            page.errors.each do |message|
+              errors.push(Error.new(page.name, message))
+            end
+          end
+        end
+      end
+
+      def validate!
+        return if errors.none?
+
+        raise ValidationError, 'Page views / elements validation error!'
+      end
+    end
+  end
+end