tests: timer: Reuse the test timer to wait a bit more

By reusing the test, we test the path of 'stop' and starting a new
timer.  This also gives some time for there to possibly be any stray
callbacks happening.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

tests/timer/src/lib.rs

@@ -74,6 +74,11 @@ fn timer_test() {
     printkln!("Atomics fired {} times", atomic_count);
 
     printkln!("Period ticks: {}", count);
+
+    // Now that everything is done and cleaned up, allow a little time to pass to make sure there
+    // are no stray timers.  We can re-use the total test timer.
+    let mut total_test = total_test.stop().start_simple(Duration::millis_at_least(1), NoWait);
+    total_test.read_count_wait();
 }
 
 /// Test a SimpleTimer.