test1.js

function main(sources) {
  const request$ = sources.ACTION
    .debug(action => console.log(action)) // This gets called when I return this stream as a sink to HTTP
    .filter(action => action.type === ActionTypes.REQUESTED_USER_REPOS)
    .map(action => action.payload.user)
    .map(user => ({
      url: `https://api.github.com/users/${user}/repos`,
      category: 'users'
    }));
    
  return {
    // ACTION: xs.of({ type: 'foo' }),
    HTTP: request$
  };
}