1 files changed, 79 insertions, 0 deletions
diff --git a/qa/spec/page/validator_spec.rb b/qa/spec/page/validator_spec.rb
new file mode 100644
index 00000000000..02822d7d18f
--- /dev/null
+++ b/qa/spec/page/validator_spec.rb
@@ -0,0 +1,79 @@
+describe QA::Page::Validator do
+  describe '#constants' do
+    subject do
+      described_class.new(QA::Page::Project)
+    end
+
+    it 'returns all constants that are module children' do
+      expect(subject.constants)
+        .to include QA::Page::Project::New, QA::Page::Project::Settings
+    end
+  end
+
+  describe '#descendants' do
+    subject do
+      described_class.new(QA::Page::Project)
+    end
+
+    it 'recursively returns all descendants that are page objects' do
+      expect(subject.descendants)
+        .to include QA::Page::Project::New, QA::Page::Project::Settings::Repository
+    end
+
+    it 'does not return modules that aggregate page objects' do
+      expect(subject.descendants)
+        .not_to include QA::Page::Project::Settings
+    end
+  end
+
+  context 'when checking validation errors' do
+    let(:view) { spy('view') }
+
+    before do
+      allow(QA::Page::Admin::Settings)
+        .to receive(:views).and_return([view])
+    end
+
+    subject do
+      described_class.new(QA::Page::Admin)
+    end
+
+    context 'when there are no validation errors' do
+      before do
+        allow(view).to receive(:errors).and_return([])
+      end
+
+      describe '#errors' do
+        it 'does not return errors' do
+          expect(subject.errors).to be_empty
+        end
+      end
+
+      describe '#validate!' do
+        it 'does not raise error' do
+          expect { subject.validate! }.not_to raise_error
+        end
+      end
+    end
+
+    context 'when there are validation errors' do
+      before do
+        allow(view).to receive(:errors)
+          .and_return(['some error', 'another error'])
+      end
+
+      describe '#errors' do
+        it 'returns errors' do
+          expect(subject.errors.count).to eq 2
+        end
+      end
+
+      describe '#validate!' do
+        it 'raises validation error' do
+          expect { subject.validate! }
+            .to raise_error described_class::ValidationError
+        end
+      end
+    end
+  end
+end