nvim: add AttachBuffer testcases

[zchee]

Add AttachBuffer testcases.

[zchee]

ref: https://github.com/neovim/node-client/blob/c1660aa98bd18c689873f7b5c2693858af6bc1b2/packages/neovim/src/api/Buffer.test.ts#L413

[zchee]

@justinmk
This testcases are bit ugly. Will fix to more better test code.

[justinmk]

They seem fine to me, but ok :)

[zchee]

@justinmk
call t.Fatal into goroutine (In Python, threading? See https://tour.golang.org/concurrency) is ugly...
test is passed, but consider alter testcases :)

[zchee]

@justinmk changed called t.Fatal without goroutine. Ready to merge and PTAL.

Note: I'll send 9d77a07 PR later. then more adding testcase for new API and AttachBuffer.

[zchee]

Note: close error channel on above goroutine.

[zchee]

Note: catch the error on above goroutine.
If occur error, called t.Fatal on the main thread (Note that in Go, not thread, the main goroutine).

[zchee]

@justinmk Sorry, fixed a bits.

[zchee]

@justinmk Travis CI is pending... always TravisCI is slow. That's why I said want to switch to CircleCI.. :(

[zchee]

@justinmk CI is passed. ready to merge!

[zchee]

@justinmk
Thanks :)
I will send PR which fully supported Neovim latest API. pls review when if you have time.

---

Also, I considing to port gen_doc of neovim core and generate godoc comment automatically.
Current godoc document is here. There are some differences from the core C source document.
https://godoc.org/github.com/neovim/go-client/nvim#Nvim

But this repo is for Go, I will make some changes different to between the C and Go languages spec.

[justinmk]

Also, I considing to port gen_doc of neovim core and generate godoc comment automatically.

Good idea. But, I don't think porting it is good. nvim.net did something similar. But that means we have a lot of code doing the same thing.

I think instead Nvim should return docs in the nvIm_get_api_info result. Although it should be optional somehow (disabled by default).

[zchee]

@justinmk
Ah, yes. port of gen_doc python script(means use doxygen and parses xml) to Go is one of the plans.
generates by *.mpack, use nvim_get_api_info, I was considering which one to use.

Although it should be optional somehow (disabled by default).

Interesting, what arg(or whatever) enable output more details?

[justinmk]

Interesting, what arg(or whatever) enable output more details?

It is not possible yet. But it's worth working on that rather than rewriting gen_vimdoc.py for all clients.

[zchee]

Ah I see. make sense.