← Back to branch summary

~certify-web-dev/twisted/certify-trunk

« back to all changes in this revision

Viewing changes to twisted/web/test/test_mvc.py

  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2007-01-17 14:52:35 UTC
  • mfrom: (1.1.5 upstream) (2.1.2 etch)
  • Revision ID: james.westby@ubuntu.com-20070117145235-btmig6qfmqfen0om
Tags: 2.5.0-0ubuntu1
New upstream version, compatible with python2.5.

Show diffs side-by-side

added added

removed removed

Lines of Context:
twisted/web/test/test_mvc.py
 
1
# Copyright (c) 2001-2004 Twisted Matrix Laboratories.
 
2
# See LICENSE for details.
 
3
 
 
4
 
 
5
"""Test cases for Twisted Model-View-Controller architecture."""
 
6
 
 
7
import random
 
8
 
 
9
try:
 
10
    import cPickle as pickle
 
11
except ImportError:
 
12
    import pickle
 
13
 
 
14
from twisted.trial import unittest
 
15
 
 
16
from twisted.web.woven import model, view, controller, interfaces
 
17
from twisted.python import components
 
18
 
 
19
# simple pickled string storage to test persistence
 
20
persisted_model = ""
 
21
 
 
22
class MyModel(model.Model):
 
23
    def __init__(self, foo, random=None):
 
24
        # I hate having to explicitly initialize the super
 
25
        model.Model.__init__(self)
 
26
        self.foo=foo
 
27
        self.random=random
 
28
 
 
29
class MyView(view.View):        
 
30
    def __init__(self, model, *args, **kwargs):
 
31
        view.View.__init__(self, model, *args, **kwargs)
 
32
        self.model.addView(self)
 
33
        # pretend self.foo is what the user now sees on their screen
 
34
        self.foo = self.model.foo
 
35
        self.random = self.model.random
 
36
        self.controller = interfaces.IController(self.model, None)
 
37
 
 
38
    def modelChanged(self, changed):
 
39
        if changed.has_key('foo'):
 
40
            self.foo = changed['foo']
 
41
        if changed.has_key('random'):
 
42
            self.random = changed['random']
 
43
 
 
44
    def twiddleControl(self, newValue):
 
45
        """
 
46
        The user twiddled a control onscreen, causing this event
 
47
        """
 
48
        self.controller.setFoo(newValue)
 
49
    
 
50
    def pushButton(self):
 
51
        """
 
52
        The user hit a button onscreen, causing this event
 
53
        """
 
54
        return self.controller.doRandom()
 
55
 
 
56
# Register MyView as the view for instances of type MyModel
 
57
components.registerAdapter(MyView, MyModel, interfaces.IView)
 
58
 
 
59
class MyController(controller.Controller):
 
60
    def setFoo(self, newValue):
 
61
        self.model.foo = newValue
 
62
        self.model.notify({'foo': newValue})
 
63
        self.persist()
 
64
    
 
65
    def doRandom(self):
 
66
        rnd = random.choice(range(100))
 
67
        self.model.random = rnd
 
68
        self.model.notify({'random': rnd})
 
69
        self.persist()
 
70
        return rnd
 
71
    
 
72
    def persist(self):
 
73
        """
 
74
        Save the model object to persistent storage
 
75
        """
 
76
        global persisted_model
 
77
        
 
78
        persisted_model = pickle.dumps(self.model)
 
79
 
 
80
# Register MyController as the controller for instances of type MyModel
 
81
components.registerAdapter(MyController, MyModel, interfaces.IController)
 
82
 
 
83
class MVCTestCase(unittest.TestCase):
 
84
    """Test MVC."""
 
85
    def setUp(self):
 
86
        self.model = MyModel("foo")
 
87
 
 
88
    def getView(self):
 
89
        return interfaces.IView(self.model, None)
 
90
 
 
91
    def testViewConstruction(self):
 
92
        view = self.getView()
 
93
        self.assert_(isinstance(view, MyView))
 
94
 
 
95
    def testControllerConstruction(self):
 
96
        view = self.getView()
 
97
        self.assert_(isinstance(view.controller, MyController))
 
98
    
 
99
    def testModelManipulation(self):
 
100
        view = self.getView()
 
101
        view.twiddleControl("bar")
 
102
        self.assertEquals("bar", self.model.foo)
 
103
    
 
104
    def testMoreModelManipulation(self):
 
105
        view = self.getView()
 
106
        value = view.pushButton()
 
107
        self.assertEquals(value, self.model.random)
 
108
 
 
109
    def testViewManipulation(self):
 
110
        """When the model updates the view should too"""
 
111
        view = self.getView()
 
112
        view.twiddleControl("bar")
 
113
        self.assertEquals("bar", view.foo)
 
114
    
 
115
    def testMoreViewManipulation(self):
 
116
        """When the model updates the view should too"""
 
117
        view = self.getView()
 
118
        value = view.pushButton()
 
119
        self.assertEquals(value, view.random)
 
120
 
 
121
 
 
122
testCases = [MVCTestCase]