Add auxiliary blob viewer for CHANGELOG

1 files changed, 27 insertions, 0 deletions

diff --git a/spec/models/blob_viewer/changelog_spec.rb b/spec/models/blob_viewer/changelog_spec.rb
new file mode 100644
index 00000000000..9066c5a05ac
--- /dev/null
+++ b/spec/models/blob_viewer/changelog_spec.rb
@@ -0,0 +1,27 @@
+require 'spec_helper'
+
+describe BlobViewer::Changelog, model: true do
+  include FakeBlobHelpers
+
+  let(:project) { create(:project, :repository) }
+  let(:blob) { fake_blob(path: 'CHANGELOG') }
+  subject { described_class.new(blob) }
+
+  describe '#render_error' do
+    context 'when there are no tags' do
+      before do
+        allow(project.repository).to receive(:tag_count).and_return(0)
+      end
+
+      it 'returns :no_tags' do
+        expect(subject.render_error).to eq(:no_tags)
+      end
+    end
+
+    context 'when there are tags' do
+      it 'returns nil' do
+        expect(subject.render_error).to be_nil
+      end
+    end
+  end
+end