1 files changed, 74 insertions, 0 deletions
diff --git a/spec/services/merge_requests/create_from_issue_service_spec.rb b/spec/services/merge_requests/create_from_issue_service_spec.rb
new file mode 100644
index 00000000000..1588d30c394
--- /dev/null
+++ b/spec/services/merge_requests/create_from_issue_service_spec.rb
@@ -0,0 +1,74 @@
+require 'spec_helper'
+
+describe MergeRequests::CreateFromIssueService, services: true do
+  let(:project) { create(:project, :repository) }
+  let(:user)    { create(:user) }
+  let(:issue)   { create(:issue, project: project) }
+
+  subject(:service) { described_class.new(project, user, issue_iid: issue.iid) }
+
+  before do
+    project.add_developer(user)
+  end
+
+  describe '#execute' do
+    it 'returns an error with invalid issue iid' do
+      result = described_class.new(project, user, issue_iid: -1).execute
+
+      expect(result[:status]).to eq :error
+      expect(result[:message]).to eq 'Invalid issue iid'
+    end
+
+    it 'delegates issue search to IssuesFinder' do
+      expect_any_instance_of(IssuesFinder).to receive(:execute).once.and_call_original
+
+      described_class.new(project, user, issue_iid: -1).execute
+    end
+
+    it 'delegates the branch creation to CreateBranchService' do
+      expect_any_instance_of(CreateBranchService).to receive(:execute).once.and_call_original
+
+      service.execute
+    end
+
+    it 'creates a branch based on issue title' do
+      service.execute
+
+      expect(project.repository.branch_exists?(issue.to_branch_name)).to be_truthy
+    end
+
+    it 'creates a system note' do
+      expect(SystemNoteService).to receive(:new_issue_branch).with(issue, project, user, issue.to_branch_name)
+
+      service.execute
+    end
+
+    it 'creates a merge request' do
+      expect { service.execute }.to change(project.merge_requests, :count).by(1)
+    end
+
+    it 'sets the merge request title to: "WIP: Resolves "$issue-title"' do
+      result = service.execute
+
+      expect(result[:merge_request].title).to eq("WIP: Resolve \"#{issue.title}\"")
+    end
+
+    it 'sets the merge request author to current user' do
+      result = service.execute
+
+      expect(result[:merge_request].author).to eq user
+    end
+
+    it 'sets the merge request source branch to the new issue branch' do
+      result = service.execute
+
+      expect(result[:merge_request].source_branch).to eq issue.to_branch_name
+    end
+
+    it 'sets the merge request target branch to the project default branch' do
+      result = service.execute
+
+      expect(result[:merge_request].target_branch).to eq project.default_branch
+    end
+  end
+end