Plone testingdzug tagung2010

Plone Testing
DZUG Tagung Dresden 2010
Timo Stollenwerk

Timo Stollenwerk
● Plone Entwickler seit 2004
● GSoC 2009: plone.app.discussion
● ~ 120 Tests
● Python und Javascript
● Code Analysis (Pylint, ZPTLint, JSLint)
● Code Coverage
● Continuous Integration

Material
● Folien:
● slideshare.net/tisto
● Code:
● svn.plone.org/svn/collective/examples/example.dzu
gconference/example.dzugconference

Test Beispiel
def is_palindrome(word):
pass

def test_palindromic_word():
assert is_palindrome("noon") == True
assert is_palindrome("foo") == False

Python Unittest Testcase
import unittest
class TestIsPalindrome(unittest.TestCase):

def test_palindromic_word():
self.assertEquals(is_palindrome("noon"), True)
self.failIf(is_palindrome("foo"))

def test_non_string_raises_exception():
self.UnlessRaises(TypeError, is_palindrome, 2)

http://docs.python.org/library/unittest.html

Warum Testen?
● Robusterer Code
● Besseres Code Verständnis
● Nachweis
● Dokumentation von Software Anforderungen
● „Billigeres“ Bugfixing
● Refactoring

Was ist Test-Driven Development?

Test-Driven Development

Kent Beck: Test Driven Development

Funktionale Tests
● Funktionaler Ablauf
● Benutzersicht
● BlackBox Testing
● Akzeptanztests

XP/Scrum und Funktionale Tests
● Abbildung von (Software) Anforderungen durch
User Stories / Acceptance Tests
● Testbare Spezifikation
● Code der die Tests besteht
● => Beweist das die Software tut was sie soll

User Stories mit (Doc)Tests
As a logged-in user, I can add a new page to the
website.

Beispiel Funktionaler Doctest
>>> browser.open(portal_url)

>>> browser.getLink(id='example-dzugconference-
presenter').click()

>>> browser.getControl(name='form.widgets.title').value =
"Presenter 1"

>>> browser.getControl(name='form.buttons.save').click()

Plone SVN: plone.app.discussion/.../presenter.txt

zope.testbrowser
● browser.open('http://nohost/plone/')
● browser.getLink(link_text).click()
● browser.url
● browser.reload()
● browser.getControl(input_name).value =
‘Whatever’
● browser.getControl(name='form.buttons.save').
click()

http://pypi.python.org/pypi/zope.testbrowser

zope.testbrowser debugging
open('/tmp/testbrowser.html','w').write(browser.co
ntents)

Interlude (Interaktives Debugging)
import interlude
suite = DocFileSuite(...,
globs={'interact': interlude.interact},
...)

>>> interact( locals() )

http://pypi.python.org/pypi/interlude/

Integrationstests
● Testet die Zusammenarbeit voneinander
abhängiger Komponenten

Beispiel Integrationstest
class IPresenter(form.Schema):

title = schema.TextLine(
title=_(u"Title")
)

...

Was wollen wir testen?
● Schema
● Typ Registrierung (FTI)
● Factory
● Hinzufügen des Inhaltstyps
● View

Integrationstests: setUp
def setUp(self):

self.portal = self.layer['portal']

setRoles(self.portal, TEST_USER_NAME, ['Manager'])
self.portal.invokeFactory('Folder', 'test-folder')
setRoles(self.portal, TEST_USER_NAME, ['Member'])

self.folder = self.portal['test-folder']

Integrationstest: Schema
def test_schema(self):

fti = queryUtility(IDexterityFTI,
name='example.dzugconference.presenter')
schema = fti.lookupSchema()

self.assertEquals(IPresenter, schema)

Integrationstest: FTI
def test_fti(self):


self.assertNotEquals(None, fti)

Integrationstest: Factory
def test_factory(self):

factory = fti.factory
new_object = createObject(factory)

self.failUnless(
IPresenter.providedBy(new_object))

Integrationstest: Hinzufügen
def test_adding(self):

self.folder.invokeFactory(
'example.dzugconference.presenter',
'presenter1')
p1 = self.folder['presenter1']

self.failUnless(IPresenter.providedBy(p1))

Integrationstest: View
def test_view(self):

self.folder.invokeFactory(
'example.dzugconference.presenter',
'presenter1')
p1 = self.folder['presenter1']
view = p1.restrictedTraverse('@@view')

self.failUnless(view)

Integrationstest: Debugging
def test_todo(self):

import pdb; pdb.set_trace()

import ipdb; ipdb.set_trace()

Unit Tests in Plone
● Test einer isolierten Komponente
● Wie?
● => Mock Objects

Mock und Fake Objekte
● Externe Datenbanken
● Web Services
● Plone Komponenten
● Netzwerkverbindungen
● Benötigen externe Komponenten

http://plone.org/products/dexterity/documentation/manual/developer-manual/testing/mock-testing

http://pypi.python.org/pypi/plone.mocktestcase

Setup Tests
● Professional Plone Development
● Layer / collective.testcaselayer
● plone.testing / plone.app.testing

Test Setup (PPD)
TestPortlet(CinemaContentTestCase):

def afterSetUp(self):
…

...

PPD: Optilux Code Examples

Test Setup (Layer)
class CommentTest(PloneTestCase):
layer = DiscussionLayer

def afterSetUp(self):
…

...

http://svn.plone.org/svn/plone/plone.app.discussion/trunk

Test Setup (plone.testing)
class
ExampleDzugConference(PloneSandboxLayer):
defaultBases = (PLONE_FIXTURE,)

def setUpPloneSite(self, portal):
…

...

Collective SVN: examples/examples.dzugconference

Testrunner
parts += test

[test]
recipe = zc.recipe.testrunner
eggs = ${instance:eggs}
defaults = ['--auto-color', '--auto-progress']

Test Geschwindigkeit
Integrations-Tests vs. Funktionale Tests

● plone.app.discussion
● Test Setup (Plone Site): 9,5 Sekunden
● 116 Integrationstests: 15 Sekunden (+ 6,5)
● 1 Funktionaler Test: 21.5 Sekunden (+ 12,0)

Test Abdeckung
buildout.cfg

[coverage-test]
recipe = zc.recipe.testrunner
eggs = ${test:eggs}
defaults = ['--coverage', '../../coverage', '-v', '--auto-progress']

[coverage-report]
recipe = zc.recipe.egg
eggs = z3c.coverage
arguments = ('coverage', 'report')

Hudson Continuous Integration

http://hudson.zmag.de/hudson

Weitere Tests
● Python
● Pylint
● Templates
● ZPTLint
● Javascript
● JSLint
● qUnit

svn.plone.org/svn/plone/plone.app.discussion/trunk/test-plone-4.0.x.cfg

Weiterführendes Material
● Kent Beck: Test Driven Development
● Python Testing: Beginner's Guide
● Tarek Ziadé: Expert Python Programming
● Testing in Plone:
http://plone.org/documentation/kb/testing
● Dexterity Manual - Testing:
http://plone.org/products/dexterity/documentatio
n/manual/developer-manual/testing

Plone testingdzug tagung2010

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