1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
# -*- coding: utf-8 -*-
# -----------------------------------------------------------------------------
# Liblarch - a library to handle directed acyclic graphs
# Copyright (c) 2011-2012 - Lionel Dricot & Izidor MatuĊĦov
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 3 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# -----------------------------------------------------------------------------
import threading
import time
from tests.watchdog import Watchdog
from gi.repository import GLib
class SignalCatcher(object):
'''
A class to test signals
'''
def __init__(self, unittest, generator, signal_name,
should_be_caught=True, how_many_signals=1,
error_code="No error code set"):
self.signal_catched_event = threading.Event()
self.generator = generator
self.signal_name = signal_name
self.signal_arguments = []
self.unittest = unittest
self.how_many_signals = how_many_signals
self.should_be_caught = should_be_caught
self.error_code = error_code
def _on_failure():
# we need to release the waiting thread
self.signal_catched_event.set()
self.missed = True
# then we notify the error
# if the error_code is set to None, we're expecting it to fail.
if error_code is not None:
print("An expected signal wasn't received %s" % error_code)
self.unittest.assertFalse(should_be_caught)
self.watchdog = Watchdog(3, _on_failure)
def __enter__(self):
def __signal_callback(*args):
self.signal_arguments.append(args[1:])
if len(self.signal_arguments) >= self.how_many_signals:
self.signal_catched_event.set()
self.handler = self.generator.connect(
self.signal_name, __signal_callback)
self.watchdog.__enter__()
return [self.signal_catched_event, self.signal_arguments]
def __exit__(self, err_type, value, traceback):
self.generator.disconnect(self.handler)
if not self.should_be_caught and not hasattr(self, 'missed'):
self.assertFalse(True)
return (not isinstance(value, Exception) and
self.watchdog.__exit__(err_type, value, traceback))
class CallbackCatcher(object):
'''
A class to test callbacks
'''
def __init__(self, unittest, generator, signal_name,
should_be_caught=True, how_many_signals=1,
error_code="No error code set"):
self.signal_catched_event = threading.Event()
self.generator = generator
self.signal_name = signal_name
self.signal_arguments = []
self.unittest = unittest
self.how_many_signals = how_many_signals
self.should_be_caught = should_be_caught
self.error_code = error_code
def _on_failure():
# we need to release the waiting thread
self.signal_catched_event.set()
self.missed = True
# then we notify the error
# if the error_code is set to None, we're expecting it to fail.
if error_code is not None:
print("An expected signal wasn't received %s" % error_code)
self.unittest.assertFalse(should_be_caught)
self.watchdog = Watchdog(3, _on_failure)
def __enter__(self):
def __signal_callback(*args):
""" Difference to SignalCatcher is that we do not skip
the first argument. The first argument by signals is widget
which sends the signal -- we omit this feature when using callbacks
"""
self.signal_arguments.append(args)
if len(self.signal_arguments) >= self.how_many_signals:
self.signal_catched_event.set()
self.handler = self.generator.register_cllbck(
self.signal_name, __signal_callback)
self.watchdog.__enter__()
return [self.signal_catched_event, self.signal_arguments]
def __exit__(self, err_type, value, traceback):
self.generator.deregister_cllbck(self.signal_name, self.handler)
if not self.should_be_caught and not hasattr(self, 'missed'):
self.assertFalse(True)
return (not isinstance(value, Exception) and
self.watchdog.__exit__(err_type, value, traceback))
class GobjectSignalsManager(object):
def init_signals(self):
'''
Initializes the gobject main loop so that signals can be used.
This function returns only when the gobject main loop is running
'''
def gobject_main_loop():
self.main_loop = GLib.MainLoop()
self.main_loop.run()
threading.Thread(target=gobject_main_loop).start()
while (not hasattr(self, 'main_loop') or
not self.main_loop.is_running()):
# since running the gobject main loop is a blocking call,
# we have to check that it has been started in a polling fashion
time.sleep(0.1)
def terminate_signals(self):
self.main_loop.quit()
|
