fix premature exit of AsyncDictionary test

tests/test_async_dictionary.py

@@ -1,8 +1,18 @@
 import trio
-from trio_util import AsyncDictionary
+from trio_util import AsyncDictionary, wait_all
 
-async def test_async_dictionary(nursery, autojump_clock):
-    async def reader(d):
+
+async def test_async_dictionary(autojump_clock):
+    d = AsyncDictionary(foo=10)
+    assert len(d) == 1
+    assert 'foo' in d
+    assert list(d) == ['foo']
+    assert await d.get_wait('foo') == 10
+    assert not d.is_waiting('foo')
+    del d['foo']
+    assert not d
+
+    async def reader():
         assert await d.get_wait('bar') == 99
         assert 'bar' in d
         assert await d.pop_wait('baz') == 'done'
@@ -11,21 +21,12 @@ async def reader(d):
             await d.get_wait('baz')
             assert False
 
-    async def writer(d):
+    async def writer():
         await trio.sleep(.1)
         assert d.is_waiting('bar')
         d['bar'] = 99
         await trio.sleep(.1)
         assert d.is_waiting('baz')
         d['baz'] = 'done'
 
-    d = AsyncDictionary(foo=10)
-    assert len(d) == 1
-    assert 'foo' in d
-    assert list(d) == ['foo']
-    assert await d.get_wait('foo') == 10
-    assert not d.is_waiting('foo')
-    del d['foo']
-    assert not d
-    nursery.start_soon(reader, d)
-    nursery.start_soon(writer, d)
+    await wait_all(reader, writer)