bpo-32650: Add an asyncgen pdb test (GH-5406) (#5419)

(cherry picked from commit 9ee1bf9)

Author: miss-islington

Lib/test/test_pdb.py

@@ -779,6 +779,66 @@ def test_pdb_next_command_for_coroutine():
  finished
  """
 
+def test_pdb_next_command_for_asyncgen():
+ """Testing skip unwindng stack on yield for coroutines for "next" command
+
+ >>> import asyncio
+
+ >>> async def agen():
+ ... yield 1
+ ... await asyncio.sleep(0)
+ ... yield 2
+
+ >>> async def test_coro():
+ ... async for x in agen():
+ ... print(x)
+
+ >>> async def test_main():
+ ... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
+ ... await test_coro()
+
+ >>> def test_function():
+ ... loop = asyncio.new_event_loop()
+ ... loop.run_until_complete(test_main())
+ ... loop.close()
+ ... print("finished")
+
+ >>> with PdbTestInput(['step',
+ ... 'step',
+ ... 'next',
+ ... 'next',
+ ... 'step',
+ ... 'next',
+ ... 'continue']):
+ ... test_function()
+ > <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[3]>(3)test_main()
+ -> await test_coro()
+ (Pdb) step
+ --Call--
+ > <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[2]>(1)test_coro()
+ -> async def test_coro():
+ (Pdb) step
+ > <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[2]>(2)test_coro()
+ -> async for x in agen():
+ (Pdb) next
+ > <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[2]>(3)test_coro()
+ -> print(x)
+ (Pdb) next
+ 1
+ > <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[2]>(2)test_coro()
+ -> async for x in agen():
+ (Pdb) step
+ --Call--
+ > <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[1]>(2)agen()
+ -> yield 1
+ (Pdb) next
+ > <doctest test.test_pdb.test_pdb_next_command_for_asyncgen[1]>(3)agen()
+ -> await asyncio.sleep(0)
+ (Pdb) continue
+ 2
+ finished
+ """
+
 def test_pdb_return_command_for_generator():
  """Testing no unwindng stack on yield for generators
  for "return" command