Function createSubtree

test/unit/core/context/test-node-values.js:45–56

(id, children, depth)

    tree = (() => {
      function createSubtree(id, children, depth) {
        const el = doc.createElement('div');
        el.id = id;
        el.textContent = id;
        if (depth > 1) {
          for (let i = 0; i < children; i++) {
            const child = createSubtree(`${id}-${i + 1}`, children, depth - 1);
            el.appendChild(child);
          }
        }
        return el;
      }
      return createSubtree('T', 4, 4);
    })();