Allow tests to pass without XBR dependencies

For version 22.5.1, tests fail if XBR dependencies are not installed:

Test failures

$ USE_TWISTED=1 PYTHONPATH=.:build/lib.linux-x86_64-3.10 trial autobahn
(...omitted...)
===============================================================================
[ERROR]
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/twisted/trial/runner.py", line 598, in loadPackage
    module = modinfo.load()
  File "/usr/lib/python3.10/site-packages/twisted/python/modules.py", line 390, in load
    return self.pathEntry.pythonPath.moduleLoader(self.name)
  File "/usr/lib/python3.10/site-packages/twisted/python/reflect.py", line 298, in namedAny
    topLevelPackage = _importAndCheckStack(trialname)
  File "/usr/lib/python3.10/site-packages/twisted/python/reflect.py", line 245, in _importAndCheckStack
    raise excValue.with_traceback(excTraceback)
  File "/build/python-autobahn/src/autobahn-22.5.1/autobahn/xbr/test/test_xbr_frealm.py", line 13, in <module>
    from autobahn.xbr._secmod import SecurityModuleMemory, EthereumKey
  File "/build/python-autobahn/src/autobahn-22.5.1/autobahn/xbr/_secmod.py", line 35, in <module>
    from eth_account.account import Account
builtins.ModuleNotFoundError: No module named 'eth_account'

autobahn.xbr.test.test_xbr_frealm
===============================================================================
[ERROR]
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/twisted/trial/runner.py", line 598, in loadPackage
    module = modinfo.load()
  File "/usr/lib/python3.10/site-packages/twisted/python/modules.py", line 390, in load
    return self.pathEntry.pythonPath.moduleLoader(self.name)
  File "/usr/lib/python3.10/site-packages/twisted/python/reflect.py", line 298, in namedAny
    topLevelPackage = _importAndCheckStack(trialname)
  File "/usr/lib/python3.10/site-packages/twisted/python/reflect.py", line 245, in _importAndCheckStack
    raise excValue.with_traceback(excTraceback)
  File "/build/python-autobahn/src/autobahn-22.5.1/autobahn/xbr/test/test_xbr_secmod.py", line 37, in <module>
    from py_eth_sig_utils.eip712 import encode_typed_data
builtins.ModuleNotFoundError: No module named 'py_eth_sig_utils'

autobahn.xbr.test.test_xbr_secmod
-------------------------------------------------------------------------------

Could you consider allowing tests to pass without XBR dependencies? For example, some other tests under autobahn/xbr first do from autobahn.xbr import HAS_XBR, and then import other XBR dependencies only when HAS_XBR is True. Relevant tests are also skipped if HAS_XBR is False.

I’m one of maintainers of official Arch Linux package python-autobahn. Maintaining XBR dependencies is a burden, so no related dependencies are picked into official repositories yet. I didn’t use AUTOBAHN_STRIP_XBR introduced in #1371, so that users can still use autobahn.xbr if they installed necessary dependencies from unofficial packages.

[yan12125]

Cool! While I’m more a buildbot user than a dev, I believe buildbot devs will be interested in those nice improvements as well 😃

[oberstet]

Hopefully packages for XBR dependencies will be easier to maintain then 😃

working on it;)

BB: +1 !! great project and people=)

To give a bit more preview, one thing that BB might indeed be interested in: formalizing their WAMP based BB APIs by writing schemas (in FlatBuffers IDL), and then profit by docs / code generation, payload validation and (future) run-time interface reflection

the last screenshot is my ugly demo of auto rendering docs from WAMP APIs … works via Jinja2 templates and a LMDB schema store, and with Crossbar.io as router (https://github.com/crossbario/crossbar-examples/blob/c67e99777ab7eb12cacab34957a245ce01d28cef/payload-validation/static/.crossbar/config.json#L105)

anyways, it is under development, not yet ready for prime time;)