1 files changed, 62 insertions, 0 deletions
diff --git a/spec/requests/api/graphql/project/languages_spec.rb b/spec/requests/api/graphql/project/languages_spec.rb
new file mode 100644
index 00000000000..6ef500cde41
--- /dev/null
+++ b/spec/requests/api/graphql/project/languages_spec.rb
@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Project.languages' do
+  include GraphqlHelpers
+
+  let_it_be(:user) { create(:user) }
+  let_it_be(:project) { create(:project, :public, :repository) }
+  let_it_be(:query) do
+    %(
+      query {
+        project(fullPath: "#{project.full_path}") {
+          languages {
+            name
+            share
+            color
+          }
+        }
+      }
+    )
+  end
+
+  let_it_be(:test_languages) do
+    [{ value: 66.69, label: "Ruby", color: "#701516", highlight: "#701516" },
+     { value: 22.98, label: "JavaScript", color: "#f1e05a", highlight: "#f1e05a" },
+     { value: 7.91, label: "HTML", color: "#e34c26", highlight: "#e34c26" },
+     { value: 2.42, label: "CoffeeScript", color: "#244776", highlight: "#244776" }]
+  end
+
+  let_it_be(:expected_languages) do
+    test_languages.map { |lang| { 'name' => lang[:label], 'share' => lang[:value], 'color' => lang[:color] } }
+  end
+
+  before do
+    allow(project.repository).to receive(:languages).and_return(test_languages)
+  end
+
+  context "when the languages haven't been detected yet" do
+    it 'returns expected languages on second request as detection is done asynchronously', :sidekiq_inline do
+      post_graphql(query, current_user: user)
+
+      expect(graphql_data_at(:project, :languages)).to eq([])
+
+      post_graphql(query, current_user: user)
+
+      expect(graphql_data_at(:project, :languages)).to eq(expected_languages)
+    end
+  end
+
+  context 'when the languages were detected before' do
+    before do
+      Projects::DetectRepositoryLanguagesService.new(project, project.first_owner).execute
+    end
+
+    it 'returns repository languages' do
+      post_graphql(query, current_user: user)
+
+      expect(graphql_data_at(:project, :languages)).to eq(expected_languages)
+    end
+  end
+end