Add implementation for matching view elements in QA

1 files changed, 61 insertions, 0 deletions

diff --git a/qa/spec/page/view_spec.rb b/qa/spec/page/view_spec.rb
new file mode 100644
index 00000000000..27e83d35de1
--- /dev/null
+++ b/qa/spec/page/view_spec.rb
@@ -0,0 +1,61 @@
+describe QA::Page::View do
+  let(:element) do
+    double('element', name: :something, pattern: /some element/)
+  end
+
+  subject { described_class.new('some/file.html', [element]) }
+
+  describe '.evaluate' do
+    it 'evaluates a block and returns a DSL object' do
+      results = described_class.evaluate do
+        element :something, 'my pattern'
+        element :something_else, /another pattern/
+      end
+
+      expect(results.elements.size).to eq 2
+    end
+  end
+
+  describe '#pathname' do
+    it 'returns an absolute and clean path to the view' do
+      expect(subject.pathname.to_s).not_to include 'qa/page/'
+      expect(subject.pathname.to_s).to include 'some/file.html'
+    end
+  end
+
+  describe '#errors' do
+    let(:file) { spy('file') }
+
+    before do
+      allow(File).to receive(:new).and_return(file)
+    end
+
+    context 'when pattern is found' do
+      before do
+        allow(file).to receive(:foreach)
+          .and_yield('some element').once
+        allow(element).to receive(:matches?)
+          .with('some element').and_return(true)
+      end
+
+      it 'walks through the view and asserts on elements existence' do
+        expect(subject.errors).to be_empty
+      end
+    end
+
+    context 'when pattern has not been found' do
+      before do
+        allow(file).to receive(:foreach)
+          .and_yield('some element').once
+        allow(element).to receive(:matches?)
+          .with('some element').and_return(false)
+      end
+
+      it 'returns an array of errors related to missing elements' do
+        expect(subject.errors).not_to be_empty
+        expect(subject.errors.first)
+          .to match %r(Missing element `.*` in `.*/some/file.html` view)
+      end
+    end
+  end
+end