Source Code for Module sparked.test.test_events

 1  # Copyright (c) 2010 Arjan Scherpenisse 
 2  # See LICENSE for details. 
 3   
 4  """ 
 5  Tests for sparked.events.* 
 6   
 7  Maintainer: Arjan Scherpenisse 
 8  """ 
 9   
10  from twisted.trial import unittest 
11   
12  from sparked import events 
13   
14 -class TestEventDispatcher(unittest.TestCase): 
15      """ 
16      Test the L{sparked.events.EventDispatcher} 
17      """ 
18   
19 -    def testSimple(self): 
20          """ 
21          Simple dispatching test 
22          """ 
23          d = events.EventDispatcher() 
24   
25          self.count = 0 
26   
27          def receive(): 
28              self.count += 1 
29          d.addObserver("hello", receive) 
30   
31          d.dispatch("hello") 
32          self.assertEquals(self.count, 1) 
33          d.dispatch("world") 
34          self.assertEquals(self.count, 1) 
35          d.dispatch("hello") 
36          self.assertEquals(self.count, 2) 
37   
38   
39 -    def testArguments(self): 
40          """ 
41          Test that positional arguments are passed in the event handler 
42          and that pre-defined positional arguments (after the priority) 
43          are prepended to the event callback args. 
44          """ 
45          d = events.EventDispatcher() 
46   
47          self.args = [] 
48   
49          def receive(*a): 
50              self.args += a 
51          d.addObserver("x", receive) 
52   
53          d.dispatch("x") 
54          self.assertEquals(self.args, []) 
55   
56          d.dispatch("x", 3, 3) 
57          self.assertEquals(self.args, [3, 3]) 
58   
59          self.args = [] 
60          d.addObserver("y", receive, 0, 'yo') 
61          d.dispatch("y", 3) 
62          self.assertEquals(self.args, ['yo', 3]) 
63          d.dispatch("y", 4) 
64          self.assertEquals(self.args, ['yo', 3, 'yo', 4]) 
65   
66   
67 -    def testKeywordArguments(self): 
68          """ 
69          Test that the keyword arguments are passed through and that 
70          predefined keywords arguments are overriden by the keyword 
71          arguments of the event. 
72          """ 
73          d = events.EventDispatcher() 
74          self.kw = {} 
75          def receive(**kw): 
76              self.kw.update(kw) 
77   
78          d.addObserver("x", receive) 
79          d.dispatch("x") 
80          self.assertEquals({}, self.kw) 
81   
82          d.dispatch("x", foo="bar") 
83          self.assertEquals({'foo': 'bar'}, self.kw) 
84   
85          self.kw = {} 
86          d.addObserver("y", receive, foo='bar') 
87          d.dispatch("y") 
88          self.assertEquals({'foo': 'bar'}, self.kw) 
89   
90          d.addObserver("y", receive, foo='bar') 
91          d.dispatch("y", foo='baz') 
92          self.assertEquals({'foo': 'baz'}, self.kw) 
93