1 files changed, 109 insertions, 0 deletions
diff --git a/spec/scripts/determine-qa-tests_spec.rb b/spec/scripts/determine-qa-tests_spec.rb
new file mode 100644
index 00000000000..043eb7f2dc9
--- /dev/null
+++ b/spec/scripts/determine-qa-tests_spec.rb
@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+require 'fast_spec_helper'
+
+load File.expand_path('../../scripts/determine-qa-tests', __dir__)
+
+RSpec.describe 'scripts/determine-qa-tests' do
+  describe DetermineQATests do
+    describe '.execute' do
+      let(:qa_spec_files) do
+        %w[qa/qa/specs/features/browser_ui/1_manage/test1.rb
+           qa/qa/specs/features/browser_ui/1_manage/user/test2.rb]
+      end
+
+      let(:qa_spec_and_non_spec_files) do
+        %w[qa/qa/specs/features/browser_ui/1_manage/test1.rb
+           qa/qa/page/admin/menu.rb]
+      end
+
+      let(:non_qa_files) do
+        %w[rubocop/code_reuse_helpers.rb
+           app/components/diffs/overflow_warning_component.rb]
+      end
+
+      let(:non_qa_and_feature_flag_files) do
+        %w[rubocop/code_reuse_helpers.rb
+           app/components/diffs/overflow_warning_component.rb
+           config/feature_flags/development/access_token_ajax.yml]
+      end
+
+      let(:qa_spec_and_non_qa_files) do
+        %w[rubocop/code_reuse_helpers.rb
+           app/components/diffs/overflow_warning_component.rb
+           qa/qa/specs/features/browser_ui/1_manage/test1.rb]
+      end
+
+      let(:qa_non_spec_and_non_qa_files) do
+        %w[rubocop/code_reuse_helpers.rb
+           app/components/diffs/overflow_warning_component.rb
+           qa/qa/page/admin/menu.rb]
+      end
+
+      shared_examples 'determine qa tests' do
+        context 'when only qa spec files have changed' do
+          it 'returns only the changed qa specs' do
+            subject = described_class.new({ changed_files: qa_spec_files }.merge(labels))
+
+            expect(subject.execute).to eql qa_spec_files.map { |path| path.delete_prefix("qa/") }.join(' ')
+          end
+        end
+
+        context 'when qa spec and non spec files have changed' do
+          it 'does not return any specs' do
+            subject = described_class.new({ changed_files: qa_spec_and_non_spec_files }.merge(labels))
+            expect(subject.execute).to be_nil
+          end
+        end
+
+        context 'when non-qa and feature flag files have changed' do
+          it 'does not return any specs' do
+            subject = described_class.new({ changed_files: non_qa_and_feature_flag_files }.merge(labels))
+            expect(subject.execute).to be_nil
+          end
+        end
+
+        context 'when qa spec and non-qa files have changed' do
+          it 'does not return any specs' do
+            subject = described_class.new({ changed_files: qa_spec_and_non_qa_files }.merge(labels))
+            expect(subject.execute).to be_nil
+          end
+        end
+
+        context 'when qa non-spec and non-qa files have changed' do
+          it 'does not return any specs' do
+            subject = described_class.new({ changed_files: qa_non_spec_and_non_qa_files }.merge(labels))
+            expect(subject.execute).to be_nil
+          end
+        end
+      end
+
+      context 'when a devops label is not specified' do
+        let(:labels) { { mr_labels: ['type::feature'] } }
+
+        it_behaves_like 'determine qa tests'
+
+        context 'when only non-qa files have changed' do
+          it 'does not return any specs' do
+            subject = described_class.new({ changed_files: non_qa_files })
+            expect(subject.execute).to be_nil
+          end
+        end
+      end
+
+      context 'when a devops label is specified' do
+        let(:labels) { { mr_labels: %w[devops::manage type::feature] } }
+
+        it_behaves_like 'determine qa tests'
+
+        context 'when only non-qa files have changed' do
+          it 'returns the specs for the devops label' do
+            subject = described_class.new({ changed_files: non_qa_files }.merge(labels))
+            allow(subject).to receive(:qa_spec_directories_for_devops_stage)
+                                .and_return(['qa/qa/specs/features/browser_ui/1_manage/'])
+            expect(subject.execute).to eql 'qa/specs/features/browser_ui/1_manage/'
+          end
+        end
+      end
+    end
+  end
+end