1 files changed, 169 insertions, 0 deletions
diff --git a/spec/tooling/lib/tooling/mappings/js_to_system_specs_mappings_spec.rb b/spec/tooling/lib/tooling/mappings/js_to_system_specs_mappings_spec.rb
new file mode 100644
index 00000000000..72e02547938
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+++ b/spec/tooling/lib/tooling/mappings/js_to_system_specs_mappings_spec.rb
@@ -0,0 +1,169 @@
+# frozen_string_literal: true
+
+require 'tempfile'
+require_relative '../../../../../tooling/lib/tooling/mappings/js_to_system_specs_mappings'
+
+RSpec.describe Tooling::Mappings::JsToSystemSpecsMappings, feature_category: :tooling do
+  # We set temporary folders, and those readers give access to those folder paths
+  attr_accessor :js_base_folder, :system_specs_base_folder
+
+  around do |example|
+    Dir.mktmpdir do |tmp_js_base_folder|
+      Dir.mktmpdir do |tmp_system_specs_base_folder|
+        self.system_specs_base_folder = tmp_system_specs_base_folder
+        self.js_base_folder           = tmp_js_base_folder
+
+        example.run
+      end
+    end
+  end
+
+  describe '#execute' do
+    let(:instance) do
+      described_class.new(
+        system_specs_base_folder: system_specs_base_folder,
+        js_base_folder: js_base_folder
+      )
+    end
+
+    subject { instance.execute(changed_files) }
+
+    context 'when no JS files were changed' do
+      let(:changed_files) { [] }
+
+      it 'returns nothing' do
+        expect(subject).to match_array([])
+      end
+    end
+
+    context 'when some JS files were changed' do
+      let(:changed_files) { ["#{js_base_folder}/issues/secret_values.js"] }
+
+      context 'when the JS files are not present on disk' do
+        it 'returns nothing' do
+          expect(subject).to match_array([])
+        end
+      end
+
+      context 'when the JS files are present on disk' do
+        before do
+          FileUtils.mkdir_p("#{js_base_folder}/issues")
+          File.write("#{js_base_folder}/issues/secret_values.js", "hello")
+        end
+
+        context 'when no system specs match the JS keyword' do
+          it 'returns nothing' do
+            expect(subject).to match_array([])
+          end
+        end
+
+        context 'when a system spec matches the JS keyword' do
+          before do
+            FileUtils.mkdir_p("#{system_specs_base_folder}/confidential_issues")
+            File.write("#{system_specs_base_folder}/confidential_issues/issues_spec.rb", "a test")
+          end
+
+          it 'returns something' do
+            expect(subject).to match_array(["#{system_specs_base_folder}/confidential_issues/issues_spec.rb"])
+          end
+        end
+      end
+    end
+  end
+
+  describe '#filter_files' do
+    subject { described_class.new(js_base_folder: js_base_folder).filter_files(changed_files) }
+
+    before do
+      File.write("#{js_base_folder}/index.js", "index.js")
+      File.write("#{js_base_folder}/index-with-ee-in-it.js", "index-with-ee-in-it.js")
+      File.write("#{js_base_folder}/index-with-jh-in-it.js", "index-with-jh-in-it.js")
+    end
+
+    context 'when no files were changed' do
+      let(:changed_files) { [] }
+
+      it 'returns an empty array' do
+        expect(subject).to match_array([])
+      end
+    end
+
+    context 'when JS files were changed' do
+      let(:changed_files) do
+        [
+          "#{js_base_folder}/index.js",
+          "#{js_base_folder}/index-with-ee-in-it.js",
+          "#{js_base_folder}/index-with-jh-in-it.js"
+        ]
+      end
+
+      it 'returns the path to the JS files' do
+        # "nil" group represents FOSS JS files in app/assets/javascripts
+        expect(subject).to match(nil => [
+          "#{js_base_folder}/index.js",
+          "#{js_base_folder}/index-with-ee-in-it.js",
+          "#{js_base_folder}/index-with-jh-in-it.js"
+        ])
+      end
+    end
+
+    context 'when JS files are deleted' do
+      let(:changed_files) { ["#{system_specs_base_folder}/deleted.html"] }
+
+      it 'returns an empty array' do
+        expect(subject).to match_array([])
+      end
+    end
+  end
+
+  describe '#construct_js_keywords' do
+    subject { described_class.new.construct_js_keywords(js_files) }
+
+    let(:js_files) do
+      %w[
+        app/assets/javascripts/boards/issue_board_filters.js
+        ee/app/assets/javascripts/queries/epic_due_date.query.graphql
+      ]
+    end
+
+    it 'returns a singularized keyword based on the first folder the file is in' do
+      expect(subject).to eq(%w[board query])
+    end
+  end
+
+  describe '#system_specs_for_edition' do
+    subject do
+      described_class.new(system_specs_base_folder: system_specs_base_folder).system_specs_for_edition(edition)
+    end
+
+    context 'when FOSS' do
+      let(:edition) { nil }
+
+      it 'checks the correct folder' do
+        expect(Dir).to receive(:[]).with("#{system_specs_base_folder}/**/*").and_call_original
+
+        subject
+      end
+    end
+
+    context 'when EE' do
+      let(:edition) { 'ee' }
+
+      it 'checks the correct folder' do
+        expect(Dir).to receive(:[]).with("ee#{system_specs_base_folder}/**/*").and_call_original
+
+        subject
+      end
+    end
+
+    context 'when JiHu' do
+      let(:edition) { 'jh' }
+
+      it 'checks the correct folder' do
+        expect(Dir).to receive(:[]).with("jh#{system_specs_base_folder}/**/*").and_call_original
+
+        subject
+      end
+    end
+  end
+end