1 files changed, 50 insertions, 0 deletions
diff --git a/spec/requests/api/v3/merge_request_diffs_spec.rb b/spec/requests/api/v3/merge_request_diffs_spec.rb
new file mode 100644
index 00000000000..c53800eef30
--- /dev/null
+++ b/spec/requests/api/v3/merge_request_diffs_spec.rb
@@ -0,0 +1,50 @@
+require "spec_helper"
+
+describe API::V3::MergeRequestDiffs, 'MergeRequestDiffs', api: true  do
+  include ApiHelpers
+
+  let!(:user)          { create(:user) }
+  let!(:merge_request) { create(:merge_request, importing: true) }
+  let!(:project)       { merge_request.target_project }
+
+  before do
+    merge_request.merge_request_diffs.create(head_commit_sha: '6f6d7e7ed97bb5f0054f2b1df789b39ca89b6ff9')
+    merge_request.merge_request_diffs.create(head_commit_sha: '5937ac0a7beb003549fc5fd26fc247adbce4a52e')
+    project.team << [user, :master]
+  end
+
+  describe 'GET /projects/:id/merge_requests/:merge_request_id/versions' do
+    it 'returns 200 for a valid merge request' do
+      get v3_api("/projects/#{project.id}/merge_requests/#{merge_request.id}/versions", user)
+      merge_request_diff = merge_request.merge_request_diffs.first
+
+      expect(response.status).to eq 200
+      expect(json_response.size).to eq(merge_request.merge_request_diffs.size)
+      expect(json_response.first['id']).to eq(merge_request_diff.id)
+      expect(json_response.first['head_commit_sha']).to eq(merge_request_diff.head_commit_sha)
+    end
+
+    it 'returns a 404 when merge_request_id not found' do
+      get v3_api("/projects/#{project.id}/merge_requests/999/versions", user)
+      expect(response).to have_http_status(404)
+    end
+  end
+
+  describe 'GET /projects/:id/merge_requests/:merge_request_id/versions/:version_id' do
+    it 'returns a 200 for a valid merge request' do
+      merge_request_diff = merge_request.merge_request_diffs.first
+      get v3_api("/projects/#{project.id}/merge_requests/#{merge_request.id}/versions/#{merge_request_diff.id}", user)
+
+      expect(response.status).to eq 200
+      expect(json_response['id']).to eq(merge_request_diff.id)
+      expect(json_response['head_commit_sha']).to eq(merge_request_diff.head_commit_sha)
+      expect(json_response['diffs'].size).to eq(merge_request_diff.diffs.size)
+    end
+
+    it 'returns a 404 when merge_request_id not found' do
+      get v3_api("/projects/#{project.id}/merge_requests/#{merge_request.id}/versions/999", user)
+
+      expect(response).to have_http_status(404)
+    end
+  end
+end