extmod/uasyncio: Add Task.done() method.

This is added because task.coro==None is no longer the way to detect if a
task is finished.  Providing a (CPython compatible) function for this
allows the implementation to be abstracted away.

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

1 files changed, 66 insertions, 0 deletions

diff --git a/tests/extmod/uasyncio_task_done.py b/tests/extmod/uasyncio_task_done.py
new file mode 100644
index 000000000..2700da8c3
--- /dev/null
+++ b/tests/extmod/uasyncio_task_done.py
@@ -0,0 +1,66 @@
+# Test the Task.done() method
+
+try:
+    import uasyncio as asyncio
+except ImportError:
+    try:
+        import asyncio
+    except ImportError:
+        print("SKIP")
+        raise SystemExit
+
+
+async def task(t, exc=None):
+    print("task start")
+    if t >= 0:
+        await asyncio.sleep(t)
+    if exc:
+        raise exc
+    print("task done")
+
+
+async def main():
+    # Task that finishes immediately.
+    print("=" * 10)
+    t = asyncio.create_task(task(-1))
+    print(t.done())
+    await asyncio.sleep(0)
+    print(t.done())
+    await t
+    print(t.done())
+
+    # Task that starts, runs and finishes.
+    print("=" * 10)
+    t = asyncio.create_task(task(0.01))
+    print(t.done())
+    await asyncio.sleep(0)
+    print(t.done())
+    await t
+    print(t.done())
+
+    # Task that raises immediately.
+    print("=" * 10)
+    t = asyncio.create_task(task(-1, ValueError))
+    print(t.done())
+    await asyncio.sleep(0)
+    print(t.done())
+    try:
+        await t
+    except ValueError as er:
+        print(repr(er))
+    print(t.done())
+
+    # Task that raises after a delay.
+    print("=" * 10)
+    t = asyncio.create_task(task(0.01, ValueError))
+    print(t.done())
+    await asyncio.sleep(0)
+    print(t.done())
+    try:
+        await t
+    except ValueError as er:
+        print(repr(er))
+    print(t.done())
+
+
+asyncio.run(main())