micropython: add micropython component

components/language/micropython/tests/basics/async_with2.py

@@ -0,0 +1,40 @@
+# test waiting within async with enter/exit functions
+
+try:
+    import usys as sys
+except ImportError:
+    import sys
+if sys.implementation.name == 'micropython':
+    # uPy allows normal generators to be awaitables
+    coroutine = lambda f: f
+else:
+    import types
+    coroutine = types.coroutine
+
+@coroutine
+def f(x):
+    print('f start:', x)
+    yield x + 1
+    yield x + 2
+    return x + 3
+
+class AContext:
+    async def __aenter__(self):
+        print('enter')
+        print('f returned:', await f(10))
+    async def __aexit__(self, exc_type, exc, tb):
+        print('exit', exc_type, exc)
+        print('f returned:', await f(20))
+
+async def coro():
+    async with AContext():
+        print('body start')
+        print('body f returned:', await f(30))
+        print('body end')
+
+o = coro()
+try:
+    while True:
+        print('coro yielded:', o.send(None))
+except StopIteration:
+    print('finished')