Add QA error when page class has no views defined

qa/qa/page/base.rb

@@ -49,6 +49,10 @@ module QA
       end
 
       def self.errors
+        if views.empty?
+          return ["#{name} class does not have views / elements defined!"]
+        end
+
         @errors ||= views.map(&:errors).flatten
       end
 

qa/qa/page/validator.rb

@@ -31,8 +31,8 @@ module QA
         @errors ||= Array.new.tap do |errors|
           descendants.each do |page|
             page.views.each do |view|
-              view.errors.each do |error|
-                errors.push(Error.new(page, view, error))
+              view.errors.each do |message|
+                errors.push(Error.new(page.name, view.path, message))
               end
             end
           end
@@ -40,11 +40,9 @@ module QA
       end
 
       def validate!
-        message = <<~EOS
-          We found validation errors!
-        EOS
+        return if errors.none?
 
-        raise ValidationError, message if errors.any?
+        raise ValidationError, 'Page views / elements validation error!'
       end
     end
   end

qa/qa/scenario/test/sanity/selectors.rb

@@ -5,7 +5,18 @@ module QA
         class Selectors < Scenario::Template
           include Scenario::Bootable
 
+          PAGE_MODULES = [QA::Page]
+
           def perform(*)
+            validators = PAGE_MODULES.map do |pages|
+              Page::Validator.new(pages)
+            end
+
+            validators.map(&:errors).flatten.tap do |errors|
+
+            end
+
+            validators.each(&:validate!)
           end
         end
       end

qa/spec/page/base_spec.rb

@@ -36,6 +36,7 @@ describe QA::Page::Base do
   describe '.errors' do
     let(:view) { double('view') }
 
+    context 'when page has views and elements defined' do
       before do
         allow(described_class).to receive(:views)
           .and_return([view])
@@ -47,4 +48,16 @@ describe QA::Page::Base do
         expect(described_class.errors).to eq ['some error']
       end
     end
+
+    context 'when page has no views and elements defined' do
+      before do
+        allow(described_class).to receive(:views).and_return([])
+      end
+
+      it 'appends an error about missing views / elements block' do
+        expect(described_class.errors)
+          .to include 'QA::Page::Base class does not have views / elements defined!'
+      end
+    end
+  end
 end

qa/spec/page/validator_spec.rb

@@ -69,13 +69,9 @@ describe QA::Page::Validator do
       end
 
       describe '#validate!' do
-        it 'does raises an error with descriptive message' do
-          message = <<~EOS
-            We found validation errors!
-          EOS
-
+        it 'raises validation error' do
           expect { subject.validate! }
-            .to raise_error described_class::ValidationError, message
+            .to raise_error described_class::ValidationError
         end
       end
     end