Converts real & present ProseMirror nodes to their test-builder equivalents

toProseMirrorTestBuilder.js

// suitable for use w/ this: https://github.com/ProseMirror/prosemirror-test-builder
function toProseMirrorTestBuilder(node, funcPrefix = 'nodes.') {
	if (node.isText) {
		return `"${node.textContent}"`;
	}
	return `${funcPrefix}${node.type.name}(${node.content.content.map(child => toProseMirrorTestBuilder(child))})`
}