1 files changed, 43 insertions, 0 deletions
diff --git a/tests/extmod/uasyncio_basic.py b/tests/extmod/uasyncio_basic.py
new file mode 100644
index 0000000000..f6685fa674
--- /dev/null
+++ b/tests/extmod/uasyncio_basic.py
@@ -0,0 +1,43 @@
+try:
+    import uasyncio as asyncio
+except ImportError:
+    try:
+        import asyncio
+    except ImportError:
+        print("SKIP")
+        raise SystemExit
+
+
+try:
+    import utime
+
+    ticks = utime.ticks_ms
+    ticks_diff = utime.ticks_diff
+except:
+    import time
+
+    ticks = lambda: int(time.time() * 1000)
+    ticks_diff = lambda t1, t0: t1 - t0
+
+
+async def delay_print(t, s):
+    await asyncio.sleep(t)
+    print(s)
+
+
+async def main():
+    print("start")
+
+    await asyncio.sleep(0.001)
+    print("after sleep")
+
+    t0 = ticks()
+    await delay_print(0.02, "short")
+    t1 = ticks()
+    await delay_print(0.04, "long")
+    t2 = ticks()
+
+    print("took {} {}".format(round(ticks_diff(t1, t0), -1), round(ticks_diff(t2, t1), -1)))
+
+
+asyncio.run(main())