Implements is_json_valid method

Checks whether the received json object is correct, and formatted as
expected.

Also tries to create a sublime-project. Let's see what it gives
This commit is contained in:
2012-10-26 14:42:49 +02:00
parent 328e1c1b29
commit 0eefe04c7b
6 changed files with 914 additions and 37 deletions

View File

@@ -1 +1 @@
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View File

@@ -23,6 +23,8 @@ It is designed to use nothing but built-in python modules.
Simply copy/paste this file and import Observer to start using it. Simply copy/paste this file and import Observer to start using it.
""" """
import json
from StringIO import StringIO
class Observer(): class Observer():
""" """
@@ -39,6 +41,7 @@ class Observer():
raise TypeError("Expected string for name") raise TypeError("Expected string for name")
self.name = name self.name = name
self.group = None
self.message = None self.message = None
def update(self, message): def update(self, message):
@@ -112,8 +115,30 @@ class Observable():
Shall be used for automatic polling. Shall be used for automatic polling.
Sets current Observable value and notifies update to subscribers. Sets current Observable value and notifies update to subscribers.
""" """
if not isinstance(val, str): #if not isinstance(val, str):
raise TypeError("Expected string for message") # raise TypeError("Expected string for message")
self.is_json_valid(val)
self.message = val self.message = val
self.__notify(self.message) self.__notify(self.message)
# JSON Stuff
def is_json_valid(self, val):
"""
Returns True if val is a valid JSon Object.
Valid means :
- correctly formatted
- contains ONLY all needed 4 sections.
"""
# json is valid
mess = json.loads(val)
# Cheks for the presence of tags
try:
#simply access all
expected = sorted(["name", "group", "type", "data"]) # should be placed somewhere else
got = sorted(mess.keys())
return (expected == got)
except KeyError:
return False

12
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View File

@@ -0,0 +1,12 @@
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821
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View File

@@ -0,0 +1,821 @@
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{
"height": 162.0
},
"replace":
{
"height": 62.0
},
"save_all_on_build": true,
"select_file":
{
"height": 0.0,
"selected_items":
[
],
"width": 0.0
},
"select_project":
{
"height": 0.0,
"selected_items":
[
],
"width": 0.0
},
"show_minimap": true,
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"status_bar_visible": true
}

View File

@@ -20,10 +20,10 @@ Observers subscribe or unsubscribe to an Observable to get notified any time mes
### JSon Structure: ### JSon Structure:
As already explained, the messages sent from the observable to the observers are formatted in JSon. As already explained, the messages sent from the observable to the observers are formatted as a JSon Object.
This allows a simple yet efficient control of the data sent and received while staying in line with the standards. This allows a simple yet efficient control of the data sent and received while staying in line with the standards.
Each transmitted package should be divided into 4 sections: Each transmitted object should be divided into 4 sections:
- name : The name of the Observer to send the data to. As each Observer is uniquely defined by its name, filling this section means the data will be sent to **at most** one Observer. - name : The name of the Observer to send the data to. As each Observer is uniquely defined by its name, filling this section means the data will be sent to **at most** one Observer.
- group : The group of Observers to send the data to. Each Observer may belong to a group. All Observers in the group will then be notified. - group : The group of Observers to send the data to. Each Observer may belong to a group. All Observers in the group will then be notified.
@@ -59,6 +59,9 @@ Here is are several examples of valid JSon message :
According to the [JSon specifications](http://json.org/), According to the [JSon specifications](http://json.org/),
_A value can be a string in double quotes, or a number, or true or false or null, or an object or an array._ _A value can be a string in double quotes, or a number, or true or false or null, or an object or an array._
**NOTE:** group handling is currently not implemented.
In future improvements, It may also be possible to provide several names or group if needed.
## Description of the package ## Description of the package
The Observer pattern does not need any external module to work. Any simple Python installation (>= 2.6) should be enough. The Observer pattern does not need any external module to work. Any simple Python installation (>= 2.6) should be enough.

View File

@@ -67,49 +67,65 @@ class TestObserver(unittest.TestCase):
self.assertRaises(TypeError, lambda: self.myObserver1.update([4, 2])) self.assertRaises(TypeError, lambda: self.myObserver1.update([4, 2]))
self.assertRaises(TypeError, lambda: self.myObserver1.update(None)) self.assertRaises(TypeError, lambda: self.myObserver1.update(None))
## Observable
def testIsJsonValid(self):
self.assertEquals(True, self.myObservable.is_json_valid('{"name": "Bob","group": "","type": "","data": 42}'))
self.assertEquals(False, self.myObservable.is_json_valid('{"namee": "Bob","group": "","type": "","data": 42}'))
self.assertEquals(False, self.myObservable.is_json_valid('{"name": "Bob","group": "","type": ""}'))
self.assertEquals(False, self.myObservable.is_json_valid('{"name": "Bob","group": "","type": "","data": 42, "last":"weekend"}'))
def testObservable(self): def testObservable(self):
self.assertRaises(TypeError, lambda: self.myObservable.set_val(42)) pass
self.assertRaises(TypeError, lambda: self.myObservable.set_val(None)) #self.assertRaises(TypeError, lambda: self.myObservable.set_val('{"name": "Bob","group": "","type": "","data": 42}'))
#self.myObservable.set_val('{"name": "Bob","group": "","type": "","data": 42}')
val = "luke" #self.assertRaises(TypeError, lambda: self.myObservable.set_val('{"c": 0, "b": 0, "a": 0}'))
self.myObservable.set_val(val)
self.assertEquals(val, self.myObservable.message)
def testSubscribe(self): # self.assertRaises(TypeError, lambda: self.myObservable.set_val(42))
self.assertEquals(len(self.myObservable.obs_collection), 0) # self.assertRaises(TypeError, lambda: self.myObservable.set_val(None))
self.assertRaises(TypeError, lambda: self.myObservable.subscribe(42))
self.myObservable.subscribe(self.myObserver1) # val = "luke"
self.assertRaises(ValueError, lambda: self.myObservable.subscribe(self.myObserver1)) # already there # self.myObservable.set_val(val)
self.myObservable.subscribe(self.myObserver2) # self.assertEquals(val, self.myObservable.message)
self.assertEquals(len(self.myObservable.obs_collection), 2) # def testSubscribe(self):
# self.assertEquals(len(self.myObservable.obs_collection), 0)
# self.assertRaises(TypeError, lambda: self.myObservable.subscribe(42))
def testUnsubscribe(self): # self.myObservable.subscribe(self.myObserver1)
self.myObservable.subscribe(self.myObserver1) # self.assertRaises(ValueError, lambda: self.myObservable.subscribe(self.myObserver1)) # already there
self.myObservable.subscribe(self.myObserver2) # self.myObservable.subscribe(self.myObserver2)
self.assertEquals(len(self.myObservable.obs_collection), 2)
self.myObservable.unsubscribe(self.myObserver1)
self.assertEquals(len(self.myObservable.obs_collection), 1)
self.assertRaises(ValueError, lambda: self.myObservable.unsubscribe(self.myObserver1)) # already removed # self.assertEquals(len(self.myObservable.obs_collection), 2)
self.assertRaises(TypeError, lambda: self.myObservable.unsubscribe("Georges"))
def testNotify(self): # def testUnsubscribe(self):
self.myObservable.subscribe(self.myObserver1) # self.myObservable.subscribe(self.myObserver1)
self.myObservable.subscribe(self.myObserver2) # self.myObservable.subscribe(self.myObserver2)
# self.assertEquals(len(self.myObservable.obs_collection), 2)
# self.myObservable.unsubscribe(self.myObserver1)
# self.assertEquals(len(self.myObservable.obs_collection), 1)
test = "R2D2" # self.assertRaises(ValueError, lambda: self.myObservable.unsubscribe(self.myObserver1)) # already removed
self.myObservable.set_val(test) # self.assertRaises(TypeError, lambda: self.myObservable.unsubscribe("Georges"))
self.assertEquals(self.myObserver1.message, test)
self.assertEquals(self.myObserver2.message, test) # def testNotify(self):
# self.myObservable.subscribe(self.myObserver1)
# self.myObservable.subscribe(self.myObserver2)
# test = "R2D2"
# self.myObservable.set_val(test)
# self.assertEquals(self.myObserver1.message, test)
# self.assertEquals(self.myObserver2.message, test)
self.myObservable.unsubscribe(self.myObserver1) # self.myObservable.unsubscribe(self.myObserver1)
test2 = "C3PO" # test2 = "C3PO"
self.myObservable.set_val(test2 ) # self.myObservable.set_val(test2 )
self.assertEquals(self.myObserver1.message, test) # self.assertEquals(self.myObserver1.message, test)
self.assertEquals(self.myObserver2.message, test2) # self.assertEquals(self.myObserver2.message, test2)
if __name__ == '__main__': if __name__ == '__main__':