1 files changed, 54 insertions, 0 deletions
diff --git a/spec/services/projects/detect_repository_languages_service_spec.rb b/spec/services/projects/detect_repository_languages_service_spec.rb
new file mode 100644
index 00000000000..f90d558938f
--- /dev/null
+++ b/spec/services/projects/detect_repository_languages_service_spec.rb
@@ -0,0 +1,54 @@
+require 'spec_helper'
+
+describe Projects::DetectRepositoryLanguagesService, :clean_gitlab_redis_shared_state do
+  set(:project) { create(:project, :repository) }
+
+  subject { described_class.new(project, project.owner) }
+
+  before do
+    allow(Feature).to receive(:disabled?).and_return(false)
+  end
+
+  describe '#execute' do
+    context 'without previous detection' do
+      it 'inserts new programming languages in the database' do
+        subject.execute
+
+        expect(ProgrammingLanguage.exists?(name: 'Ruby')).to be(true)
+        expect(ProgrammingLanguage.count).to be(4)
+      end
+
+      it 'inserts the repository langauges' do
+        names = subject.execute.map(&:name)
+
+        expect(names).to eq(%w[Ruby JavaScript HTML CoffeeScript])
+      end
+    end
+
+    context 'with a previous detection' do
+      before do
+        subject.execute
+
+        allow(project.repository).to receive(:languages).and_return(
+          [{ value: 99.63, label: "Ruby", color: "#701516", highlight: "#701516" },
+           { value: 0.3, label: "D", color: "#701516", highlight: "#701516" }]
+        )
+      end
+
+      it 'updates the repository languages' do
+        repository_languages = subject.execute.map(&:name)
+
+        expect(repository_languages).to eq(%w[Ruby D])
+      end
+    end
+
+    context 'when no repository exists' do
+      set(:project) { create(:project) }
+
+      it 'has no languages' do
+        expect(subject.execute).to be_empty
+        expect(project.repository_languages).to be_empty
+      end
+    end
+  end
+end