unreliable test: `FileSystem: rename() source file does not exist at first, but eventually appears`

[Hweinstock]

Test Details

• Name of test: FileSystem: rename() source file does not exist at first, but eventually appears
• OS of failure: macOs
• VSCode version of failure (minimum/insider/stable): minimum
• Link to failing run: https://github.com/aws/aws-toolkit-vscode/actions/runs/12999361648/job/36254529169
• Link to failing test:

  aws-toolkit-vscode/packages/core/src/test/shared/fs/fs.test.ts

  Lines 410 to 425 in bdbd8e8

  	it('source file does not exist at first, but eventually appears', async () => {
  	const oldPath = testFolder.pathFrom('oldFile.txt')
  	const newPath = testFolder.pathFrom('newFile.txt')
  	const result = fs.rename(oldPath, newPath)
  	// this file is created after the first "exists" check fails, the following check should pass
  	void testutil.toFile('hello world', oldPath)
  	await result
  	testutil.assertTelemetry('ide_fileSystem', {
  	action: 'rename',
  	result: 'Succeeded',
  	reason: 'RenameRaceCondition',
  	})
  	})
  	})

Log of Test Failure

1) FileSystem
       rename()
         source file does not exist at first, but eventually appears:

      AssertionError [ERR_ASSERTION]: telemetry metric not found: "ide_fileSystem"
      + expected - actual

      -false
      +true

Additional Information

[Hweinstock]

Fixed by #6452