1 files changed, 44 insertions, 0 deletions
diff --git a/spec/services/merge_requests/add_context_service_spec.rb b/spec/services/merge_requests/add_context_service_spec.rb
new file mode 100644
index 00000000000..d4e95c2f1ea
--- /dev/null
+++ b/spec/services/merge_requests/add_context_service_spec.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe MergeRequests::AddContextService do
+  let(:project) { create(:project, :repository) }
+  let(:admin) { create(:admin) }
+  let(:merge_request) { create(:merge_request, source_project: project, target_project: project, author: admin) }
+  let(:commits) { ["874797c3a73b60d2187ed6e2fcabd289ff75171e"] }
+  let(:raw_repository) { project.repository.raw }
+
+  subject(:service) { described_class.new(project, admin, merge_request: merge_request, commits: commits) }
+
+  describe "#execute" do
+    it "adds context commit" do
+      service.execute
+
+      expect(merge_request.merge_request_context_commit_diff_files.length).to eq(2)
+    end
+
+    context "when user doesn't have permission to update merge request" do
+      let(:user) { create(:user) }
+      let(:merge_request1) { create(:merge_request, source_project: project, author: user) }
+
+      subject(:service) { described_class.new(project, user, merge_request: merge_request, commits: commits) }
+
+      it "doesn't add context commit" do
+        subject.execute
+
+        expect(merge_request.merge_request_context_commit_diff_files.length).to eq(0)
+      end
+    end
+
+    context "when the commits array is empty" do
+      subject(:service) { described_class.new(project, admin, merge_request: merge_request, commits: []) }
+
+      it "doesn't add context commit" do
+        subject.execute
+
+        expect(merge_request.merge_request_context_commit_diff_files.length).to eq(0)
+      end
+    end
+  end
+end