1 files changed, 53 insertions, 0 deletions
diff --git a/spec/services/packages/npm/create_tag_service_spec.rb b/spec/services/packages/npm/create_tag_service_spec.rb
new file mode 100644
index 00000000000..e7a784068fa
--- /dev/null
+++ b/spec/services/packages/npm/create_tag_service_spec.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Packages::Npm::CreateTagService do
+  let(:package) { create(:npm_package) }
+  let(:tag_name) { 'test-tag' }
+
+  describe '#execute' do
+    subject { described_class.new(package, tag_name).execute }
+
+    shared_examples 'it creates the tag' do
+      it { expect { subject }.to change { Packages::Tag.count }.by(1) }
+      it { expect(subject.name).to eq(tag_name) }
+      it 'adds tag to the package' do
+        tag = subject
+        expect(package.reload.tags).to match_array([tag])
+      end
+    end
+
+    context 'with no existing tag name' do
+      it_behaves_like 'it creates the tag'
+    end
+
+    context 'with exisiting tag name' do
+      let!(:package_tag2) { create(:packages_tag, package: package2, name: tag_name) }
+
+      context 'on package with different name' do
+        let!(:package2) { create(:npm_package, project: package.project) }
+
+        it_behaves_like 'it creates the tag'
+      end
+
+      context 'on different package type' do
+        let!(:package2) { create(:conan_package, project: package.project, name: 'conan_package_name', version: package.version) }
+
+        it_behaves_like 'it creates the tag'
+      end
+
+      context 'on same package with different version' do
+        let!(:package2) { create(:npm_package, project: package.project, name: package.name, version: '5.0.0-testing') }
+
+        it { expect { subject }.to not_change { Packages::Tag.count } }
+        it { expect(subject.name).to eq(tag_name) }
+
+        it 'adds tag to the package' do
+          tag = subject
+          expect(package.reload.tags).to match_array([tag])
+          expect(package2.reload.tags).to be_empty
+        end
+      end
+    end
+  end
+end