This PR contains:

• bugfix
• feature
• refactor
• tests
• documentation
• metadata

Breaking Changes?

• yes
• no

If yes, please describe the breakage.

Please Describe Your Changes

This PR fixes #69, wherein manipulating the child nodes for a particular node (in this case a Func node) did not reflect in stringifying of the node. This solution was derived from the following test code:

const { nodeToString, parse } = require('./lib');
const Punctuation = require('./lib/nodes/Punctuation');

const root = parse('rgb(100% 100% 100%)');

root.first.nodes.splice(1, 0, new Punctuation({ value: ',', parent: root.first }));
root.first.nodes.splice(3, 0, new Punctuation({ value: ',', parent: root.first }));

console.log(nodeToString(root));

The result of which is now:

rgb(100%, 100%, 100%)

Note that the parent property is being set in the code above, whereas the referenced issue did not set the property. This is required for PostCSS internals to accurately determine raws values to render.

Since we were previously only rendering the params property of functions (which is a string reference to unparsed function parameters), some additional work had to be performed to correctly capture and render spacing around and within the function parens. I believe this PR covers all of the various cases we may encounter.