Integration (-ish) testing with BlueZ D-Bus API

Integration (-ish) testing with BlueZ D-Bus API

[Tal]

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Hey list,

  I just wrote a little Haskell library wrapping the GATT API [0]. It's been a
surprisingly smooth experience - thanks for the API and documentation!

  One issue that remains, though, is decent testing. Right now the tests limit
themselves to calling d-bus methods and just checking that they don't throw an
error. I don't see how I can do more than that - check that BlueZ in fact
registered an application with the data I'm expecting, or check that it's
handling notifications, etc. (Without, that is, pulling out my phone and trying
it manually.) Tapping into dbus-monitor in some cases would provide some help,
but everyone who wants to run the tests would need there dbus config files, the
tests would have to run as root, I'd have to do fairly fragile parsing of the
logs that would still only approximate the properties I really want to check
for.

  If I could register an application on a computer and interact with it as if
it were a remote peripheral (essentially having the computer be both the
central and the peripheral), then testing would be much easier and more
comprehensive. In this particular case, I know the communication would only go
as far as DBus, and not through the hardware layers of the bluetooth stack, but
that's okay.

  Is this at all possible?

[0] http://hackage.haskell.org/package/ble

--
Julian K. Arni
Haskell Consultant, Turing Jump
https://turingjump.com


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Re: Integration (-ish) testing with BlueZ D-Bus API

[Barry Byford]

Hello Julian,

On 13 March 2017 at 17:19, Tal <jkarni@gmail.com> wrote:
>
> Hey list,
>
>   I just wrote a little Haskell library wrapping the GATT API [0]. It's been a
> surprisingly smooth experience - thanks for the API and documentation!
>
>   One issue that remains, though, is decent testing. Right now the tests limit
> themselves to calling d-bus methods and just checking that they don't throw an
> error. I don't see how I can do more than that - check that BlueZ in fact
> registered an application with the data I'm expecting, or check that it's
> handling notifications, etc. (Without, that is, pulling out my phone and trying
> it manually.) Tapping into dbus-monitor in some cases would provide some help,
> but everyone who wants to run the tests would need there dbus config files, the
> tests would have to run as root, I'd have to do fairly fragile parsing of the
> logs that would still only approximate the properties I really want to check
> for.
>
>   If I could register an application on a computer and interact with it as if
> it were a remote peripheral (essentially having the computer be both the
> central and the peripheral), then testing would be much easier and more
> comprehensive. In this particular case, I know the communication would only go
> as far as DBus, and not through the hardware layers of the bluetooth stack, but
> that's okay.
>
>   Is this at all possible?

This sounds like the functionality of the DBUS Mock library.
https://github.com/martinpitt/python-dbusmock

There is a BlueZ example/template in the library although they are
slightly out of date with the latest BlueZ.
I have started to work on updating and adding some GATT functionality
although have not got that far.
However it does allow me to run integration tests on GitHub.

>
> [0] http://hackage.haskell.org/package/ble
>
> --
> Julian K. Arni
> Haskell Consultant, Turing Jump
> https://turingjump.com
>

Re: Integration (-ish) testing with BlueZ D-Bus API

[Tal]

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Hi Barry,

On Mon, Mar 13, 2017 at 06:33:23PM +0000, Barry Byford wrote:
> Hello Julian,
>
> This sounds like the functionality of the DBUS Mock library.
> https://github.com/martinpitt/python-dbusmock
>
> There is a BlueZ example/template in the library although they are
> slightly out of date with the latest BlueZ.
> I have started to work on updating and adding some GATT functionality
> although have not got that far.
> However it does allow me to run integration tests on GitHub.
>

I think this will do nicely, thanks!

--
Julian K. Arni
Haskell Consultant, Turing Jump
https://turingjump.com

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