Support both 0 and NULL lock_versions

1 files changed, 44 insertions, 0 deletions

diff --git a/spec/initializers/active_record_locking_spec.rb b/spec/initializers/active_record_locking_spec.rb
new file mode 100644
index 00000000000..5a16aef78e6
--- /dev/null
+++ b/spec/initializers/active_record_locking_spec.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'ActiveRecord locking' do
+  let(:issue) { create(:issue) }
+
+  shared_examples 'locked model' do
+    before do
+      issue.update_column(:lock_version, start_lock_version)
+    end
+
+    it 'can be updated' do
+      issue.update(title: "New title")
+
+      expect(issue.reload.lock_version).to eq(new_lock_version)
+    end
+
+    it 'can be deleted' do
+      expect { issue.destroy }.to change { Issue.count }.by(-1)
+    end
+  end
+
+  context 'when lock_version is NULL' do
+    let(:start_lock_version) { nil }
+    let(:new_lock_version) { 1 }
+
+    it_behaves_like 'locked model'
+  end
+
+  context 'when lock_version is 0' do
+    let(:start_lock_version) { 0 }
+    let(:new_lock_version) { 1 }
+
+    it_behaves_like 'locked model'
+  end
+
+  context 'when lock_version is 1' do
+    let(:start_lock_version) { 1 }
+    let(:new_lock_version) { 2 }
+
+    it_behaves_like 'locked model'
+  end
+end