Running async test method raises an error

[gertjanstulp]

Hi, running the test_method method on an async python test raises an error in neovim. The method looks something like this:

async def test_something():
    await some_async_method()
    <checks, not relevant for this issue>

If I try to run this test I get the following error:

E5108: Error executing lua ...local/share/nvim/lazy/nvim-dap-python/lua/dap-python.lua:336: assertion failed!
stack traceback:
        [C]: in function 'assert'
        ...local/share/nvim/lazy/nvim-dap-python/lua/dap-python.lua:336: in function '_get_nodes'
        ...local/share/nvim/lazy/nvim-dap-python/lua/dap-python.lua:423: in function 'test_method'
        [string ":lua"]:1: in main chunk

I took a quick look at the code around line 336 and I think that the failing assertion doesn't take async methods into account. It verifies if the second child element of the parent node is an identifier:

local ident = parent:child(1)
assert(ident:type() == "identifier")

With an async method this breaks as the second child element is actually the 'def' element. In that case I think it should verify the third child element. I tried it out by locally modifying the code on line 335 to

local ident = parent:child(2)
assert(ident:type() == "identifier")

This resolved the issue and I could successfully run the test.

I'm using pytest as test_runner in my setup.

[Avishayy]

@gertjanstulp thanks for reporting this, this annoyed me too, I created a PR for a fix (to support both async and sync tests) in #148