"branch" in .deploy({ branch }) accepts upper case letters and symbols, but deployment is "Not Found"

[nwtgck]

- What is the current behavior?

When I deployed with branch: which includes upper cases or symbols, deployment is done successfully. But, deployed URL, .deploy.deploy_ssl_ur tells me "Not Found".

const NetlifyAPI = require('netlify');

const token = process.env.NETLIFY_AUTH_TOKEN;
const siteId = process.env.NETLIFY_SITE_ID;

const client = new NetlifyAPI(token);

(async () => {
  const deploy = await client.deploy(siteId, './public', {
    draft: true,
    branch: 'UPPERCASE', // https://uppercase--nwtgck-netlify-test.netlify.app/
    // branch: 'slash/hoge', // https://slash-hoge--nwtgck-netlify-test.netlify.app/
    // branch: 'under_score', // https://under-score--nwtgck-netlify-test.netlify.app/

  });
  console.log('URL: ', deploy.deploy.deploy_ssl_url);
})();

- What is the expected behavior?

The internal API or this "js-client" converts "branch" property properly.

my workaround

branch = branch.replace(/[^a-zA-Z\d]/g, '-').toLowerCase()

related: nwtgck/actions-netlify#243