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#pyagl
## Basic info
Python library with bindings and tests for Automotive Grade Linux services
Currently the library works only with images built with `aglsetup.sh agl-devel`,
the non-agl-devel image does not expose websockets on TCP ports.
The library implements CLI-callable main() methods and argparse with --help supplements in most modules.
When installing the library into a new virtualenv, the modules should be executable with
`python3 -m pyagl.services.<service> --help` - which should return CLI usage of the invoked module
First positional argument is IP Address of the target board
## Examples:
```shell script
$ python3 -m pyagl.services.bluetooth_pbap --help
usage: bluetooth_pbap.py [-h] [-l {CRITICAL,FATAL,ERROR,WARN,WARNING,INFO,DEBUG,NOTSET}] [--port PORT] [--listener] [--subscribe event] [--unsubscribe event] [--json JSON] [--verb VERB] [--api API] [--import_contacts] [--status] [--contacts] [--history HISTORY] ipaddr
Utility to interact with agl-service-* via it's websocket
positional arguments:
ipaddr AGL host address
optional arguments:
-h, --help show this help message and exit
-l {CRITICAL,FATAL,ERROR,WARN,WARNING,INFO,DEBUG,NOTSET}, --loglevel {CRITICAL,FATAL,ERROR,WARN,WARNING,INFO,DEBUG,NOTSET}
Level of logging verbosity
--port PORT AGL service websocket port
--listener Register a listener for incoming events
--subscribe event Subscribe to event type
--unsubscribe event Unsubscribe from event type
--import_contacts
--status
--contacts
--history HISTORY Request call history - ICH/OCH/MCH/CCH
```
```shell script
$ python3 -m pyagl.services.bluetooth_pbap 192.168.234.251 --contacts
Sent contacts request with messageid 896503218
[RESPONSE][Status: success][896503218][Info: contacts][Data: {'vcards': [{'fn': 'John Smith', 'telephone': [{'HOME': '+15557028324'}]}...]},
```
Until the package is uploaded onto PyPI, either:
* `git clone` the repository
* `cd` into the cloned directory
* `pip install .`
or
* `pip install` the generated zip from the repository(when public)
or
* git clone \<repo\>
* mkdir packages && cd packages
* pip wheel ../\<repo\>
which creates "wheels" for pyagl and the dependencies it needs
\- specified in setup.py - and are pip installable
---
## Creating new modules
Creating a new modules and tests can be done with a few steps:
1. clone the repository
2. cd \<repo\>/pyagl
3. cookiecutter -f ../templates/
## Running the tests
The tests can be run on target if installed, directly from the cloned repository, or if installed locally on a development host, from the default Python site-packages directory or a configured virtualenv. On target the tests will be in /usr/lib/python3.8/site-packages/pyagl/tests. If installed locally on a development machine:
* on Debian systems the default site packages directory should be in /usr/local/lib/python3.8/dist-packages/pyagl/tests
* for virtualenv, the directory will be <virtualenv_dir>/lib/python3.8/site-packages/pyagl/tests
### Invoking pytest
The tests may be run with `pytest` by passing it the tests directory:
```
pytest <tests directory>
```
On target, the command would be:
```
pytest /usr/lib/python3.8/site-packages/pyagl/tests
```
Note that the tests have been labelled with `pytest` markers to allow selecting or deselecting tests with the `pytest` '-k' option. Each binding's test are marked with the name of the binding, with additional markers that include:
* hwrequired - verb tests requiring available physical hardware
* can_j1939 - CAN binding tests specific to J1939 protocol
#### Examples
Running just the tests for a single binding (audiomixer):
```
pytest -k "audiomixer" /usr/lib/python3.8/site-packages/pyagl/tests
```
Note that the per-binding markers cannot use dashes ('-') in their names, so generating the marker for a specific binding can be done with something like:
```
echo agl-service-can-low-level | cut -d- -f3- | tr - _
```
Running tests with LAVA compatible output:
```
pytest --lava "audiomixer" /usr/lib/python3.8/site-packages/pyagl/tests
```
Note that `--lava` and `-L` are equivalent, either will activate LAVA compatible output. As well, note that when using LAVA output, the `pytest` `-v` verbose option is ignored.
### Test Configuration
Running the tests remotely involves the export of the following environment variables:
* AGL_TGT_IP - required - point at an IP Address with AGL instance
* AGL_TGT_PORT - optional - if not exported, the library wil connect to the IP address via ssh to find out the service's listening TCP port
When running tests on target, AGL_TGT_IP is not required, as the tests will assume the local host is the target.
Some specific tests are dependent on additional configuration via the following environment variables:
* AGL_TEST_TIMEOUT - optional, over-ride the default 5 second timeout value for binding responses.
* AGL_AVAILABLE_INTERFACES - optional, specify which of ethernet, wifi, and bluetooth interfaces are available. The value is a comma separated list, with a default value of "ethernet,wifi,bluetooth".
* AGL_BTMAP_RECIPIENT - optional, when running Bluetooth MAP tests, this would be used as phone number to write text messages to.
* AGL_BTMAP_TEXT - optional, when running Bluetooth MAP tests, messages will be composed with this text.
* AGL_CAN_INTERFACE - optional, specify the CAN interface to use for CAN testing, default value is "can0".
* AGL_PBAP_PHONENUM - optional , when running Bluetooth PBAP tests, this phone number will be used to .search().
* AGL_PBAP_VCF - optional, for the Bluetooh PBAP tests query a contact entry out of the phonebook.
* AGL_BT_TEST_ADDR - optional, for the Bluetooth tests pair/connect/disconnect with an actual Bluetooth device(phone)'s address . The address should have the DBus address style as "dev_00_01_02_03_04_05" instead of a regular colon-separated MAC address.
Should some of the optional variables be omitted, the fixtures and their dependent tests should fail gracefully with a "XFAIL" (expected fail) or "SKIP" result. There are tests that are dependent on other tests, therefore if the dependent tests fail, the whole test chain will be skipped.
### Running Inside QEMU
To run `QEMU` from inside the AGL build environment to be able to run tests, the `runqemu` command can be used. For example:
```
$ runqemu kvm publicvnc serial slirp audio
```
A note on some of the `runqemu` options:
- serial - enables a serial console
- slirp - enables user networking (no root login / `sudo` required)
- audio - enables audio
The tests can then be invoked after logging in:
```
AGL_AVAILABLE_INTERFACES=ethernet pytest -k "not hwrequired" /usr/lib/python3.8/site-packages/pyagl/tests
```
If running `QEMU` outside of the AGL build environment, note that you will likely want to pass the `-soundhw hda` option to enable audio support if running the audiomixer tests, and an appropriate `-netdev` option to enable some form of networking for the network binding tests.
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