1 files changed, 270 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/reports/accessibility_reports_comparer_spec.rb b/spec/lib/gitlab/ci/reports/accessibility_reports_comparer_spec.rb
new file mode 100644
index 00000000000..31a330f46b1
--- /dev/null
+++ b/spec/lib/gitlab/ci/reports/accessibility_reports_comparer_spec.rb
@@ -0,0 +1,270 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Ci::Reports::AccessibilityReportsComparer do
+  let(:comparer) { described_class.new(base_reports, head_reports) }
+  let(:base_reports) { Gitlab::Ci::Reports::AccessibilityReports.new }
+  let(:head_reports) { Gitlab::Ci::Reports::AccessibilityReports.new }
+  let(:url) { "https://gitlab.com" }
+  let(:single_error) do
+    [
+      {
+        "code" => "WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.NoContent",
+        "type" => "error",
+        "typeCode" => 1,
+        "message" => "Anchor element found with a valid href attribute, but no link content has been supplied.",
+        "context" => %{<a href="/" class="navbar-brand animated"><svg height="36" viewBox="0 0 1...</a>},
+        "selector" => "#main-nav > div:nth-child(1) > a",
+        "runner" => "htmlcs",
+        "runnerExtras" => {}
+      }
+    ]
+  end
+  let(:different_error) do
+    [
+      {
+        "code" => "WCAG2AA.Principle1.Guideline1_4.1_4_3.G18.Fail",
+        "type" => "error",
+        "typeCode" => 1,
+        "message" => "This element has insufficient contrast at this conformance level.",
+        "context" => %{<a href="/stages-devops-lifecycle/" class="main-nav-link">Product</a>},
+        "selector" => "#main-nav > div:nth-child(2) > ul > li:nth-child(1) > a",
+        "runner" => "htmlcs",
+        "runnerExtras" => {}
+      }
+    ]
+  end
+
+  describe '#status' do
+    subject { comparer.status }
+
+    context 'when head report has an error' do
+      before do
+        head_reports.add_url(url, single_error)
+      end
+
+      it 'returns status failed' do
+        expect(subject).to eq(described_class::STATUS_FAILED)
+      end
+    end
+
+    context 'when head reports does not have errors' do
+      before do
+        head_reports.add_url(url, [])
+      end
+
+      it 'returns status success' do
+        expect(subject).to eq(described_class::STATUS_SUCCESS)
+      end
+    end
+  end
+
+  describe '#errors_count' do
+    subject { comparer.errors_count }
+
+    context 'when head report has an error' do
+      before do
+        head_reports.add_url(url, single_error)
+      end
+
+      it 'returns the number of new errors' do
+        expect(subject).to eq(1)
+      end
+    end
+
+    context 'when head reports does not have an error' do
+      before do
+        head_reports.add_url(url, [])
+      end
+
+      it 'returns the number new errors' do
+        expect(subject).to eq(0)
+      end
+    end
+  end
+
+  describe '#resolved_count' do
+    subject { comparer.resolved_count }
+
+    context 'when base reports has an error and head has a different error' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, different_error)
+      end
+
+      it 'returns the resolved count' do
+        expect(subject).to eq(1)
+      end
+    end
+
+    context 'when base reports has errors head has no errors' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, [])
+      end
+
+      it 'returns the resolved count' do
+        expect(subject).to eq(1)
+      end
+    end
+
+    context 'when base reports has errors and head has the same error' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, single_error)
+      end
+
+      it 'returns zero' do
+        expect(subject).to eq(0)
+      end
+    end
+
+    context 'when base reports does not have errors and head has errors' do
+      before do
+        head_reports.add_url(url, single_error)
+      end
+
+      it 'returns the number of resolved errors' do
+        expect(subject).to eq(0)
+      end
+    end
+  end
+
+  describe '#total_count' do
+    subject { comparer.total_count }
+
+    context 'when base reports has an error' do
+      before do
+        base_reports.add_url(url, single_error)
+      end
+
+      it 'returns the error count' do
+        expect(subject).to eq(1)
+      end
+    end
+
+    context 'when head report has an error' do
+      before do
+        head_reports.add_url(url, single_error)
+      end
+
+      it 'returns the error count' do
+        expect(subject).to eq(1)
+      end
+    end
+
+    context 'when base report has errors and head report has errors' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, different_error)
+      end
+
+      it 'returns the error count' do
+        expect(subject).to eq(2)
+      end
+    end
+  end
+
+  describe '#existing_errors' do
+    subject { comparer.existing_errors }
+
+    context 'when base report has errors and head has a different error' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, different_error)
+      end
+
+      it 'returns the existing errors' do
+        expect(subject.size).to eq(1)
+        expect(subject.first["code"]).to eq("WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.NoContent")
+      end
+    end
+
+    context 'when base report does not have errors and head has errors' do
+      before do
+        base_reports.add_url(url, [])
+        head_reports.add_url(url, single_error)
+      end
+
+      it 'returns an empty array' do
+        expect(subject).to be_empty
+      end
+    end
+  end
+
+  describe '#new_errors' do
+    subject { comparer.new_errors }
+
+    context 'when base reports has errors and head has more errors' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, single_error + different_error)
+      end
+
+      it 'returns new errors between base and head reports' do
+        expect(subject.size).to eq(1)
+        expect(subject.first["code"]).to eq("WCAG2AA.Principle1.Guideline1_4.1_4_3.G18.Fail")
+      end
+    end
+
+    context 'when base reports has an error and head has no errors' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, [])
+      end
+
+      it 'returns an empty array' do
+        expect(subject).to be_empty
+      end
+    end
+
+    context 'when base reports does not have errors and head has errors' do
+      before do
+        head_reports.add_url(url, single_error)
+      end
+
+      it 'returns the new error' do
+        expect(subject.size).to eq(1)
+        expect(subject.first["code"]).to eq("WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.NoContent")
+      end
+    end
+  end
+
+  describe '#resolved_errors' do
+    subject { comparer.resolved_errors }
+
+    context 'when base report has errors and head has more errors' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, single_error + different_error)
+      end
+
+      it 'returns an empty array' do
+        expect(subject).to be_empty
+      end
+    end
+
+    context 'when base reports has errors and head has a different error' do
+      before do
+        base_reports.add_url(url, single_error)
+        head_reports.add_url(url, different_error)
+      end
+
+      it 'returns the resolved errors' do
+        expect(subject.size).to eq(1)
+        expect(subject.first["code"]).to eq("WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.NoContent")
+      end
+    end
+
+    context 'when base reports does not have errors and head has errors' do
+      before do
+        head_reports.add_url(url, single_error)
+      end
+
+      it 'returns an empty array' do
+        expect(subject).to be_empty
+      end
+    end
+  end
+end