snapnode

run your node in snapshot mode!

Usage

• first, install: npm install -g snapnode
  • also npm install -g electron if you don't have it already
• now instead of running node yourscript.js run snapnode yourscript.js
• you'll see the output of yourscript.js in a window
• try changing something in yourscript.js to produce a different output.
• now you can see the diff!
• if the new output looks wrong, fix it. If it looks right, press the "Update" button to update the base snapshot.

Power user

• j and k move to the next and previous snapshot in the list.

• when there is a diff you can press the \ (or |) key to toggle between a unified diff and a split left/right view.

Multiple snapshots

You can create a config file with multiple snapshots. Whenever you edit a js file in your project, all snapshots will be recalculated so you can see which diffs changed.

For example, create a file called snaps.js in your project root:

module.exports = {
  entries: [
    {
      file: 'place-order.js',
      args: [ ]
    },

    {
      file: 'place-order.js',
      args: [ 'pizza', '--cheese' ]
    },

    {
      file: 'hello.js',
      args: [ 'Mr. Realperson' ]
    }
  ]
}

Then run snapnode snaps.js

License

MIT