src/client/pkg/require/require.go
func NoErrorWithinT(tb testing.TB, t time.Duration, f func() error, msgAndArgs ...interface{}) {
	tb.Helper()
	errCh := make(chan error)
	go func() {
		// This goro will leak if the timeout is exceeded, but it's okay because the
		// test is failing anyway
		errCh <- f()
	}()
	select {
	case err := <-errCh:
		if err != nil {
			fatal(tb, msgAndArgs, "No error is expected but got %s", err.Error())
		}
	case <-time.After(t):
		fatal(tb, msgAndArgs, "operation did not finish within %s", t.String())
	}
}
func NoErrorWithinT(tb testing.TB, t time.Duration, f func() error, msgAndArgs ...interface{}) {
	tb.Helper()
	errCh := make(chan error)
	go func() {
		// This goro will leak if the timeout is exceeded, but it's okay because the
		// test is failing anyway
		errCh <- f()
	}()
	select {
	case err := <-errCh:
		if err != nil {
			fatal(tb, msgAndArgs, "No error is expected but got %s", err.Error())
		}
	case <-time.After(t):
		fatal(tb, msgAndArgs, "operation did not finish within %s", t.String())
	}
}
// NoErrorWithinT checks that 'f' finishes within time 't' and does not emit an
// error