frappy/test/test_modules.py

#  -*- coding: utf-8 -*-
# *****************************************************************************
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# Module authors:
#   Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
#   Markus Zolliker <markus.zolliker@psi.ch>
#
# *****************************************************************************
"""test data types."""

# no fixtures needed
#import pytest

import threading
from secop.datatypes import BoolType, FloatRange, StringType
from secop.modules import Communicator, Drivable, Module
from secop.params import Command, Override, Parameter
from secop.poller import BasicPoller


class DispatcherStub:
    def __init__(self, updates):
        self.updates = updates

    def announce_update(self, modulename, pname, pobj):
        self.updates.setdefault(modulename, {})
        if pobj.readerror:
            self.updates[modulename]['error', pname] = str(pobj.readerror)
        else:
            self.updates[modulename][pname] = pobj.value


class LoggerStub:
    def debug(self, *args):
        print(*args)
    info = warning = exception = debug


class ServerStub:
    def __init__(self, updates):
        self.dispatcher = DispatcherStub(updates)


def test_Communicator():
    o = Communicator('communicator', LoggerStub(), {'.description':''}, ServerStub({}))
    o.earlyInit()
    o.initModule()
    event = threading.Event()
    o.startModule(event.set)
    assert event.is_set() # event should be set immediately


def test_ModuleMeta():
    class Newclass1(Drivable):
        parameters = {
            'pollinterval': Override(reorder=True),
            'param1' : Parameter('param1', datatype=BoolType(), default=False),
            'param2': Parameter('param2', datatype=FloatRange(unit='Ohm'), default=True),
            "cmd": Command('stuff', argument=BoolType(), result=BoolType())
        }
        commands = {
            # intermixing parameters with commands is not recommended,
            # but acceptable for influencing the order
            'a1': Parameter('a1', datatype=BoolType(), default=False),
            'a2': Parameter('a2', datatype=BoolType(), default=True),
            'value': Override(datatype=StringType(), default='first'),
            'cmd2': Command('another stuff', argument=BoolType(), result=BoolType()),
        }
        pollerClass = BasicPoller

        def do_cmd(self, arg):
            return not arg

        def do_cmd2(self, arg):
            return not arg

        def read_param1(self):
            return True

        def read_param2(self):
            return False

        def read_a1(self):
            return True

        def read_a2(self):
            return True

        def read_value(self):
            return 'second'


    # first inherited accessibles, then Overrides with reorder=True and new accessibles
    sortcheck1 = ['value', 'status', 'target', 'pollinterval',
                 'param1', 'param2', 'cmd', 'a1', 'a2', 'cmd2']

    class Newclass2(Newclass1):
        parameters = {
            'cmd2': Override('another stuff'),
            'value': Override(datatype=FloatRange(unit='deg'), reorder=True),
            'a1': Override(datatype=FloatRange(unit='$/s'), reorder=True, readonly=False),
            'b2': Parameter('<b2>', datatype=BoolType(), default=True,
                            poll=True, readonly=False, initwrite=True),
        }

        def write_a1(self, value):
            self._a1_written = value
            return value

        def write_b2(self, value):
            self._b2_written = value
            return value

        def read_value(self):
            return 0

    sortcheck2 = ['status', 'target', 'pollinterval',
                  'param1', 'param2', 'cmd', 'a2', 'cmd2', 'value', 'a1', 'b2']

    logger = LoggerStub()
    updates = {}
    srv = ServerStub(updates)

    params_found = set() # set of instance accessibles
    objects = []

    for newclass, sortcheck in [(Newclass1, sortcheck1), (Newclass2, sortcheck2)]:
        o1 = newclass('o1', logger, {'.description':''}, srv)
        o2 = newclass('o2', logger, {'.description':''}, srv)
        for obj in [o1, o2]:
            objects.append(obj)
            ctr_found = set()
            for n, o in obj.accessibles.items():
                # check that instance accessibles are unique objects
                assert o not in params_found
                params_found.add(o)
                assert o.ctr not in ctr_found
                ctr_found.add(o.ctr)
                check_order = [(obj.accessibles[n].ctr, n) for n in sortcheck]
            assert check_order == sorted(check_order)

    # check for inital updates working properly
    o1 = Newclass1('o1', logger, {'.description':''}, srv)
    expectedBeforeStart = {'target': 0.0, 'status': (Drivable.Status.IDLE, ''),
            'param1': False, 'param2': 1.0, 'a1': 0.0, 'a2': True, 'pollinterval': 5.0,
            'value': 'first'}
    assert updates.pop('o1') == expectedBeforeStart
    o1.earlyInit()
    event = threading.Event()
    o1.startModule(event.set)
    event.wait()
    # should contain polled values
    expectedAfterStart = {'status': (Drivable.Status.IDLE, ''),
            'value': 'second'}
    assert updates.pop('o1') == expectedAfterStart

    # check in addition if parameters are written
    o2 = Newclass2('o2', logger, {'.description':'', 'a1': 2.7}, srv)
    # no update for b2, as this has to be written
    expectedBeforeStart['a1'] = 2.7
    assert updates.pop('o2') == expectedBeforeStart
    o2.earlyInit()
    event = threading.Event()
    o2.startModule(event.set)
    event.wait()
    # value has changed type, b2 and a1 are written
    expectedAfterStart.update(value=0, b2=True, a1=2.7)
    assert updates.pop('o2') == expectedAfterStart
    assert o2._a1_written == 2.7
    assert o2._b2_written is True

    assert not updates

    o1 = Newclass1('o1', logger, {'.description':''}, srv)
    o2 = Newclass2('o2', logger, {'.description':''}, srv)
    assert o2.parameters['a1'].datatype.unit == 'deg/s'
    o2 = Newclass2('o2', logger, {'.description':'', 'value.unit':'mm', 'param2.unit':'mm'}, srv)
    # check datatype is not shared
    assert o1.parameters['param2'].datatype.unit == 'Ohm'
    assert o2.parameters['param2'].datatype.unit == 'mm'
    # check '$' in unit works properly
    assert o2.parameters['a1'].datatype.unit == 'mm/s'
    cfg = Newclass2.configurables
    assert set(cfg.keys()) == {'export', 'group', 'description',
        'meaning', 'visibility', 'implementation', 'interface_classes', 'target', 'stop',
        'status', 'param1', 'param2', 'cmd', 'a2', 'pollinterval', 'b2', 'cmd2', 'value',
        'a1'}
    assert set(cfg['value'].keys()) == {'group', 'export', 'relative_resolution',
        'visibility', 'unit', 'default', 'datatype', 'fmtstr',
        'absolute_resolution', 'poll', 'max', 'min', 'readonly', 'constant',
        'description', 'needscfg'}

    # check on the level of classes
    # this checks Newclass1 too, as it is inherited by Newclass2
    for baseclass in Newclass2.__mro__:
        # every cmd/param has to be collected to accessibles
        acs = getattr(baseclass, 'accessibles', None)
        if issubclass(baseclass, Module):
            assert acs is not None
        else: # do not check object or mixin
            acs = {}
        for n, o in acs.items():
            # check that class accessibles are not reused as instance accessibles
            assert o not in params_found

    for o in objects:
        o.earlyInit()
    for o in objects:
        o.initModule()