642b4eb#diff-139bc3fd7bb5865bb64075715666a788 removed some tests that ensured the click handler calls fetch with the correct arguments (see #306 (comment)). Ideally, we should re-introduce these tests, perhaps with the help of a tool like:

• https://github.com/speedskater/babel-plugin-rewire
• https://github.com/plasticine/inject-loader