1 files changed, 69 insertions, 0 deletions
diff --git a/spec/services/issue_links/destroy_service_spec.rb b/spec/services/issue_links/destroy_service_spec.rb
new file mode 100644
index 00000000000..f441629f892
--- /dev/null
+++ b/spec/services/issue_links/destroy_service_spec.rb
@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe IssueLinks::DestroyService do
+  describe '#execute' do
+    let(:project) { create(:project_empty_repo) }
+    let(:user) { create(:user) }
+
+    subject { described_class.new(issue_link, user).execute }
+
+    context 'when successfully removes an issue link' do
+      let(:issue_a) { create(:issue, project: project) }
+      let(:issue_b) { create(:issue, project: project) }
+
+      let!(:issue_link) { create(:issue_link, source: issue_a, target: issue_b) }
+
+      before do
+        project.add_reporter(user)
+      end
+
+      it 'removes related issue' do
+        expect { subject }.to change(IssueLink, :count).from(1).to(0)
+      end
+
+      it 'creates notes' do
+        # Two-way notes creation
+        expect(SystemNoteService).to receive(:unrelate_issue)
+                                       .with(issue_link.source, issue_link.target, user)
+        expect(SystemNoteService).to receive(:unrelate_issue)
+                                       .with(issue_link.target, issue_link.source, user)
+
+        subject
+      end
+
+      it 'returns success message' do
+        is_expected.to eq(message: 'Relation was removed', status: :success)
+      end
+
+      context 'target is an incident' do
+        let(:issue_b) { create(:incident, project: project) }
+
+        it_behaves_like 'an incident management tracked event', :incident_management_incident_unrelate do
+          let(:current_user) { user }
+        end
+      end
+    end
+
+    context 'when failing to remove an issue link' do
+      let(:unauthorized_project) { create(:project) }
+      let(:issue_a) { create(:issue, project: project) }
+      let(:issue_b) { create(:issue, project: unauthorized_project) }
+
+      let!(:issue_link) { create(:issue_link, source: issue_a, target: issue_b) }
+
+      it 'does not remove relation' do
+        expect { subject }.not_to change(IssueLink, :count).from(1)
+      end
+
+      it 'does not create notes' do
+        expect(SystemNoteService).not_to receive(:unrelate_issue)
+      end
+
+      it 'returns error message' do
+        is_expected.to eq(message: 'No Issue Link found', status: :error, http_status: 404)
+      end
+    end
+  end
+end