No rows returned by useVirtualizer in unit tests

Describe the bug

In browser table rows are rendered as expected. In unit tests useVirtualizer returns an empty array from rowVirtualizer.getVirtualItems(). The bug is introduce with changes introduced by v3.0.0-beta.63. It also exists in the latest release v3.0.1

I think it was introduced by #598 here

Your minimal, reproducible example

below

Steps to reproduce

This unit test will pass for v3.0.0-beta.62 and fail for any version there after.

import { useVirtualizer } from "@tanstack/react-virtual";
import { render, screen } from "@testing-library/react";
import { styled } from "@mui/material";
import { useCallback, useRef } from "react";

const items = [
  { id: 1, name: "foo" },
  { id: 2, name: "bar" },
];

const Parent = styled("div")({ height: "100%", width: "100%", overflow: "auto" });

const Inner = styled("div")({ width: "100%", position: "relative" });

const Row = styled("div")({ position: "absolute", top: 0, left: 0, width: "100%" });

function VirtualTableComponent() {
  const parentRef = useRef<HTMLDivElement>(null);

  const rowVirtualizer = useVirtualizer({
    count: items.length,
    getScrollElement: () => parentRef.current,
    estimateSize: useCallback(() => 56, []),
  });

  return (
    <Parent ref={parentRef}>
      <Inner sx={{ height: `${rowVirtualizer.getTotalSize()}px` }}> {/* set at 112px as expected */}
        {rowVirtualizer.getVirtualItems().map((virtualRow) => ( // always an empty array
          <Row
            key={virtualRow.index}
            data-index={virtualRow.index}
            ref={rowVirtualizer.measureElement}
            style={{ transform: `translateY(${virtualRow.start}px)` }}
          >
            <div>{items[virtualRow.index].name}</div>
          </Row>
        ))}
      </Inner>
    </Parent>
  );
}

describe("@tanstack/react-virtual", () => {
  it("renders rows", () => {
    render(<VirtualTableComponent />);

    expect(screen.getByText(items[0].name)).toBeInTheDocument();
    expect(screen.getByText(items[1].name)).toBeInTheDocument();
  });
});

Expected behavior

As a user I expect the provided unit test to pass but it fails.

How often does this bug happen?

Every time

Screenshots or Videos

No response

Platform

macOS

tanstack-virtual version

v3.0.1

TypeScript version

v4.9.5

Additional context

I've console.log'd out the value of rowVirtualizer.getTotalSize() and it is given 112 as expected

Terms & Code of Conduct

• I agree to follow this project's Code of Conduct
• I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.

Start by running the provided React unit test and comparing behavior between v3.0.0-beta.62 and v3.0.1. Inspect the useVirtualizer path and the changes referenced in pull request #598; done means getVirtualItems() contains the expected rows and the test renders both names.