reconnect after unbind and disconnect

[theLastOfCats]

Thank you for contributing to naz.
Every contribution to naz is important.

Contributions are under the MIT License.

Answer the following questions,

What(What have you changed?)

• Added reconnect after unbind_and_disconnect in recieve_data lifecycle

Why(Why did you change it?)

• Fixes Set connection state to CLOSED after unbind_and_disconnect #211

References:

[codecov-commenter]

Codecov Report

Merging #212 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #212   +/-   ##
=======================================
  Coverage   84.61%   84.62%           
=======================================
  Files          15       15           
  Lines        1566     1567    +1     
=======================================
+ Hits         1325     1326    +1     
  Misses        241      241           

Impacted Files	Coverage Δ
naz/client.py	81.05% <100.00%> (+0.02%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e00567c...3a97834. Read the comment docs.

[komuw]

@theLastOfCats can I suggest that instead of this change.

You add a new line after;

naz/naz/client.py

Line 2362 in 3a97834

self.writer = None

with

self.current_session_state = SmppSessionState.CLOSED

[theLastOfCats]

If I'll choose this path, test which introduced in #208 will break.

To fix this flow, we'll need to move the reconnection phase in send_data.
Specifically this part https://github.com/komuw/naz/blob/master/naz/client.py#L1471

Or we reconnect after unbind as in PR.