1 files changed, 19 insertions, 0 deletions
diff --git a/spec/helpers/commits_helper_spec.rb b/spec/helpers/commits_helper_spec.rb
index 727c25ff529..a2c008790f9 100644
--- a/spec/helpers/commits_helper_spec.rb
+++ b/spec/helpers/commits_helper_spec.rb
@@ -26,4 +26,23 @@ describe CommitsHelper do
         not_to include('onmouseover="alert(1)"')
     end
   end
+
+  describe '#view_on_environment_button' do
+    let(:project) { create(:empty_project) }
+    let(:environment) { create(:environment, external_url: 'http://example.com') }
+    let(:path) { 'source/file.html' }
+    let(:sha) { RepoHelpers.sample_commit.id }
+
+    before do
+      allow(environment).to receive(:external_url_for).with(path, sha).and_return('http://example.com/file.html')
+    end
+
+    it 'returns a link tag linking to the file in the environment' do
+      html = helper.view_on_environment_button(sha, path, environment)
+      node = Nokogiri::HTML.parse(html).at_css('a')
+
+      expect(node[:title]).to eq('View on example.com')
+      expect(node[:href]).to eq('http://example.com/file.html')
+    end
+  end
 end