uasyncio.core: test_cancel_sleep: Test for cancelling uasyncio.sleep(…

…) call.

uasyncio.core/test_cancel_sleep.py

@@ -0,0 +1,33 @@
+import utime
+try:
+    import uasyncio.core as asyncio
+except ImportError:
+    import asyncio
+
+
+requested = None
+
+async def coro():
+    try:
+        await asyncio.sleep(1)
+        assert False, "sleep wasn't cancelled"
+    except asyncio.CancelledError:
+        now = utime.ticks_ms()
+        diff = utime.ticks_diff(now, requested)
+        print("cancelled at: %s, delay: %s" % (now, diff))
+        assert diff < 10
+
+
+async def canceller(task):
+    global requested
+    asyncio.cancel(task)
+    requested = utime.ticks_ms()
+    print("requested cancel at:", requested)
+    await asyncio.sleep(1)
+
+
+loop = asyncio.get_event_loop()
+
+task = coro()
+loop.create_task(task)
+loop.run_until_complete(canceller(task))