noflo-runtime-headless

NoFlo headless runner

This utility enables proxying NoFlo postMessage runtimes running in a headless browser to the FBP protocol WebSocket transport.

The primary use case for this is enabling NoFlo browser components and applications to be tested with fbp-spec on the command-line (for example, inside a Continuous Integration system).

Requirements

You need a browser build of NoFlo and your components that exposes the noflo-runtime-postmessage library via window.require(). If you're building your libraries with grunt-noflo-browser, this will already be the case.

For custom builds, the easiest way to do this is by adding something like the following to your WebPack entry file:

const postMessageRuntime = require('noflo-runtime-postmessage');
 
const exported = {
  'noflo-runtime-postmessage': postMessageRuntime,
};
 
function requireModule(moduleName) {
  if (exported[moduleName]) {
    return exported[moduleName];
  }
  throw new Error(`Module ${moduleName} not available`);
}
 
if (window) {
  window.require = requireModule;
}

Running

Start the runtime with:

$ npx noflo-runtime-headless --file path/to/my/file.js

You can also let fbp-spec start the runtime for you:

$ npx fbp-spec --address ws://localhost:3569 --command \"noflo-runtime-headless -f path/to/my/file.js\" spec/*.yaml

Changes

• 0.2.0 (Oct 13 2020)
  • Released with updated dependencies
• 0.1.0 (Sep 23 2018)
  • Initial version