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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Test cases for explorer
"""
from twisted.trial import unittest
from twisted.manhole import explorer
import types
"""
# Tests:
Get an ObjectLink. Browse ObjectLink.identifier. Is it the same?
Watch Object. Make sure an ObjectLink is received when:
Call a method.
Set an attribute.
Have an Object with a setattr class. Watch it.
Do both the navite setattr and the watcher get called?
Sequences with circular references. Does it blow up?
"""
class SomeDohickey:
def __init__(self, *a):
self.__dict__['args'] = a
def bip(self):
return self.args
class TestBrowser(unittest.TestCase):
def setUp(self):
self.pool = explorer.explorerPool
self.pool.clear()
self.testThing = ["How many stairs must a man climb down?",
SomeDohickey(42)]
def test_chain(self):
"Following a chain of Explorers."
xplorer = self.pool.getExplorer(self.testThing, 'testThing')
self.assertEqual(xplorer.id, id(self.testThing))
self.assertEqual(xplorer.identifier, 'testThing')
dxplorer = xplorer.get_elements()[1]
self.assertEqual(dxplorer.id, id(self.testThing[1]))
class Watcher:
zero = 0
def __init__(self):
self.links = []
def receiveBrowserObject(self, olink):
self.links.append(olink)
def setZero(self):
self.zero = len(self.links)
def len(self):
return len(self.links) - self.zero
class SetattrDohickey:
def __setattr__(self, k, v):
v = list(str(v))
v.reverse()
self.__dict__[k] = ''.join(v)
class MiddleMan(SomeDohickey, SetattrDohickey):
pass
# class TestWatch(unittest.TestCase):
class FIXME_Watch:
def setUp(self):
self.globalNS = globals().copy()
self.localNS = {}
self.browser = explorer.ObjectBrowser(self.globalNS, self.localNS)
self.watcher = Watcher()
def test_setAttrPlain(self):
"Triggering a watcher response by setting an attribute."
testThing = SomeDohickey('pencil')
self.browser.watchObject(testThing, 'testThing',
self.watcher.receiveBrowserObject)
self.watcher.setZero()
testThing.someAttr = 'someValue'
self.assertEqual(testThing.someAttr, 'someValue')
self.failUnless(self.watcher.len())
olink = self.watcher.links[-1]
self.assertEqual(olink.id, id(testThing))
def test_setAttrChain(self):
"Setting an attribute on a watched object that has __setattr__"
testThing = MiddleMan('pencil')
self.browser.watchObject(testThing, 'testThing',
self.watcher.receiveBrowserObject)
self.watcher.setZero()
testThing.someAttr = 'ZORT'
self.assertEqual(testThing.someAttr, 'TROZ')
self.failUnless(self.watcher.len())
olink = self.watcher.links[-1]
self.assertEqual(olink.id, id(testThing))
def test_method(self):
"Triggering a watcher response by invoking a method."
for testThing in (SomeDohickey('pencil'), MiddleMan('pencil')):
self.browser.watchObject(testThing, 'testThing',
self.watcher.receiveBrowserObject)
self.watcher.setZero()
rval = testThing.bip()
self.assertEqual(rval, ('pencil',))
self.failUnless(self.watcher.len())
olink = self.watcher.links[-1]
self.assertEqual(olink.id, id(testThing))
def function_noArgs():
"A function which accepts no arguments at all."
return
def function_simple(a, b, c):
"A function which accepts several arguments."
return a, b, c
def function_variable(*a, **kw):
"A function which accepts a variable number of args and keywords."
return a, kw
def function_crazy((alpha, beta), c, d=range(4), **kw):
"A function with a mad crazy signature."
return alpha, beta, c, d, kw
class TestBrowseFunction(unittest.TestCase):
def setUp(self):
self.pool = explorer.explorerPool
self.pool.clear()
def test_sanity(self):
"""Basic checks for browse_function.
Was the proper type returned? Does it have the right name and ID?
"""
for f_name in ('function_noArgs', 'function_simple',
'function_variable', 'function_crazy'):
f = eval(f_name)
xplorer = self.pool.getExplorer(f, f_name)
self.assertEqual(xplorer.id, id(f))
self.failUnless(isinstance(xplorer, explorer.ExplorerFunction))
self.assertEqual(xplorer.name, f_name)
def test_signature_noArgs(self):
"""Testing zero-argument function signature.
"""
xplorer = self.pool.getExplorer(function_noArgs, 'function_noArgs')
self.assertEqual(len(xplorer.signature), 0)
def test_signature_simple(self):
"""Testing simple function signature.
"""
xplorer = self.pool.getExplorer(function_simple, 'function_simple')
expected_signature = ('a','b','c')
self.assertEqual(xplorer.signature.name, expected_signature)
def test_signature_variable(self):
"""Testing variable-argument function signature.
"""
xplorer = self.pool.getExplorer(function_variable,
'function_variable')
expected_names = ('a','kw')
signature = xplorer.signature
self.assertEqual(signature.name, expected_names)
self.failUnless(signature.is_varlist(0))
self.failUnless(signature.is_keyword(1))
def test_signature_crazy(self):
"""Testing function with crazy signature.
"""
xplorer = self.pool.getExplorer(function_crazy, 'function_crazy')
signature = xplorer.signature
expected_signature = [{'name': 'c'},
{'name': 'd',
'default': range(4)},
{'name': 'kw',
'keywords': 1}]
# The name of the first argument seems to be indecipherable,
# but make sure it has one (and no default).
self.failUnless(signature.get_name(0))
self.failUnless(not signature.get_default(0)[0])
self.assertEqual(signature.get_name(1), 'c')
# Get a list of values from a list of ExplorerImmutables.
arg_2_default = map(lambda l: l.value,
signature.get_default(2)[1].get_elements())
self.assertEqual(signature.get_name(2), 'd')
self.assertEqual(arg_2_default, range(4))
self.assertEqual(signature.get_name(3), 'kw')
self.failUnless(signature.is_keyword(3))
if __name__ == '__main__':
unittest.main()
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