How to store and compare the output from console.log() in jest environment

I'd like to implement the test that has two results of the code with the console.log().

import { Writable } from 'node:stream'

class MemoryStream extends Writable {
  contents = ''

  _write(chunk: any): void {
    if (chunk instanceof Buffer) {
      this.contents += chunk.toString('utf8')
    } else if (typeof chunk === 'string') {
      this.contents += chunk
    }
  }
}

describe('hello.js', () => {
  it('hello.js', () => {
    const result1 = new MemoryStream()
    const write = process.stdout.write
    process.stdout.write = result1.write.bind(result1)
    console.log('Hello, World.') // TODO: use test case 1

    const result2 = new MemoryStream()
    process.stdout.write = result2.write.bind(result2)
    console.log('Hello, World2.') // TODO: use test case 2

    process.stdout.write = write
    console.log('test') // shows 'test'
    console.log(result1.contents) // shows nothing
    console.log(result2.contents) // shows nothing
    expect(result1.contents).toMatch(result2.contents) // passed?
  })
})

However nothing could be captured from the Writable streams. I confirmed that Writable._write() got the chunk as a Buffer. Can Writable receive the output of console.log() as String and append it to a variable?