micropython: add micropython component

components/language/micropython/tests/extmod/uasyncio_wait_task.py

@@ -0,0 +1,77 @@
+# Test waiting on a task
+
+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 task(t):
+    print("task", t)
+
+
+async def delay_print(t, s):
+    await asyncio.sleep(t)
+    print(s)
+
+
+async def task_raise():
+    print("task_raise")
+    raise ValueError
+
+
+async def main():
+    print("start")
+
+    # Wait on a task
+    t = asyncio.create_task(task(1))
+    await t
+
+    # Wait on a task that's already done
+    t = asyncio.create_task(task(2))
+    await asyncio.sleep(0.001)
+    await t
+
+    # Wait again on same task
+    await t
+
+    print("----")
+
+    # Create 2 tasks
+    ts1 = asyncio.create_task(delay_print(0.2, "hello"))
+    ts2 = asyncio.create_task(delay_print(0.4, "world"))
+
+    # Time how long the tasks take to finish, they should execute in parallel
+    print("start")
+    t0 = ticks()
+    await ts1
+    t1 = ticks()
+    await ts2
+    t2 = ticks()
+    print("took {} {}".format(round(ticks_diff(t1, t0), -2), round(ticks_diff(t2, t1), -2)))
+
+    # Wait on a task that raises an exception
+    t = asyncio.create_task(task_raise())
+    try:
+        await t
+    except ValueError:
+        print("ValueError")
+
+
+asyncio.run(main())