tests/extmod: Make uasyncio_heaplock test more deterministic.

This helps the test pass on systems with an inaccurate sleep time.

Signed-off-by: Damien George <damien@micropython.org>

tests/extmod/uasyncio_heaplock.py

@@ -29,15 +29,15 @@ async def task(id, n, t):
 
 
 async def main():
-    t1 = asyncio.create_task(task(1, 4, 10))
-    t2 = asyncio.create_task(task(2, 4, 25))
+    t1 = asyncio.create_task(task(1, 4, 20))
+    t2 = asyncio.create_task(task(2, 2, 50))
 
     micropython.heap_lock()
 
     print("start")
     await asyncio.sleep_ms(1)
     print("sleep")
-    await asyncio.sleep_ms(100)
+    await asyncio.sleep_ms(70)
     print("finish")
 
     micropython.heap_unlock()

tests/extmod/uasyncio_heaplock.py.exp

@@ -6,6 +6,4 @@ sleep
 1 2
 2 1
 1 3
-2 2
-2 3
 finish