(Javascript) stretch dimension of flex children is zero

[heswell]

I can't seem to get basic flex layout working in Javascript, not sure if I'm missing something.
I would expect the child items in the following to be assigned a height matching the full height of the parent node (per align-items: stretch). In fact they are assigned height 0

import('stretch-layout').then((stretch) => {
  
  const { Allocator, Node, Display, AlignItems } = stretch;
  const allocator = new Allocator();
 
  const rootNode = new Node(allocator, {width: 600, height: 300, display: Display.Flex, alignItems: AlignItems.Stretch});

  const childNodes = [
    new Node(allocator, {flexShrink:1, flexGrow:1, flexBasis: 'auto'}),
    new Node(allocator, {flexShrink:1, flexGrow:1, flexBasis: 'auto'})
  ]
  rootNode.addChild(childNodes[0]);
  rootNode.addChild(childNodes[1]);

  const computedLayout = rootNode.computeLayout();
 
  logLayout(computedLayout)

})

function logLayout(computedLayout){
  const {x, y, width, height, childCount} = computedLayout;
  console.log(`x:${x}, y:${y}, width:${width}, height:${height}`);

  for (let i=0;i<childCount; i++) {
      logLayout(computedLayout.child(i));
  };

};

logs the following:

x:0, y:0, width:600, height:300
x:0, y:0, width:300, height:0
x:300, y:0, width:300, height:0

[heswell]

see fix in

#62

This is my first attempt at coding in rust, not sure if it's the optimal solution.