[Bug]: Date.now() returns float value when called from page Js after using clock.install() on page instance

[Lazar-Adrian]

Version

1.45.1

Steps to reproduce

1. Clone https://github.com/Lazar-Adrian/FloatingDate
2. npm install
3. npx playwright test

Expected behavior

All tests should pass

Actual behavior

Some of the tests that use clock.install(), will fail because the return value of Date.now() is not an integer

Additional context

Having Date.now() return a float value will affect the test ecosystem if the Js from the AUT will try to use the return value of Date.now() as an integer.
Note that from my runs i have noticed that only the tests that use page.waitForTimeout() might cause the issue to appear.

Environment

System:
  OS: macOS Sonoma 14.5
  CPU: Apple M1 Pro
Binaries:
  Node: v20.9.0
  npm: 10.1.0
npmPackages:
  @playwright/test: 1.45.1