Test-driven development: a case study
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The document discusses the development of a semantic social collaboration platform utilizing technologies like Python/Django, PostgreSQL, and RDF-based APIs. It emphasizes the benefits of Test-Driven Development (TDD), promoting faster and cleaner code delivery, improved regression discovery, and easy refactoring. Additionally, it outlines a case study involving the use of RDF to manage data and annotations within the project.
![SELF_URI = URIRef('self:#')
def __getattr__(self, attr):
property_uri = attribute_uri(attr)
oo = list(self.attributes.objects(
self.SELF_URI,
property_uri))
if not oo:
raise AttributeError(attr)
if len(oo) == 1:
return oo[0].toPython()
return set([o.toPython() for o in oo])](https://image.slidesharecdn.com/tdd-111116085633-phpapp02/85/Test-driven-development-a-case-study-29-320.jpg)
Test-driven development: a case study
- 1. TDD
- 3. Effect?
- 4. More code
- 6. More simple code, delivered faster
- 9. Fast & precise regression discovery
- 10. Easy refactoring
- 11. Case study
- 12. Things come together. Semantic social collaboration platform
- 13. Things come together. Python/Django PostgreSQL Apache Solr Custom Java backend
- 14. RDF-based APIs Graphs of linked data URIs as identifiers Subject-Predicate-Object triples
- 15. <_:me> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> . <_:me> <http://xmlns.com/foaf/0.1/family_name> "Pasternacki" . <_:me> <http://xmlns.com/foaf/0.1/givenname> "Maciej" . <_:me> <http://xmlns.com/foaf/0.1/homepage> <http://www.pasternacki.net/> . <_:me> <http://xmlns.com/foaf/0.1/mbox> <mailto:[email protected]> . <_:me> <http://xmlns.com/foaf/0.1/name> "Maciej Pasternacki" . <_:me> <http://xmlns.com/foaf/0.1/nick> "japhy" . <_:me> <http://xmlns.com/foaf/0.1/workplaceHomepage> <http://www.gnowsis.com/> . @prefix : <#> . @prefix foaf: <http://xmlns.com/foaf/0.1/> . :me a foaf:Person . :me foaf:family_name "Pasternacki" . :me foaf:givenname "Maciej" . :me foaf:homepage <http://www.pasternacki.net/> . :me foaf:mbox <mailto:[email protected]> . :me foaf:name "Maciej Pasternacki" . :me foaf:nick "japhy" . :me foaf:workplaceHomepage <http://www.gnowsis.com/> .
- 16. Item Relation uuid : uuid type : uri rdf_type : URI * label : string created : dateTime lastModified: dateTime Description text : string target (1) Thing Annotation Rating value : normalizedFloat InformationElement Wiki text : string Property File type : uri path : string lexicalForm : string mimeType : string ... Webpage url : string summary : string StringProperty Email subject : string value : string ... IntProperty value : integer Blogpost Tweet DatetimeProperty timestamp : dateTime author : string value : datetime author : string text : string ... ...
- 17. def promote(self): if not hasattr(self, '_promoted'): if isinstance(self, self.get_class()): self._promoted = self else: self._promoted = getattr( self, getattr( self.get_class(), self._root_class_name + '_ptr' ).field.related_query_name() ) return self._promoted SELECT … FROM "pim_annotation" LEFT OUTER JOIN "pim_related" ON ("pim_annotation"."id" = "pim_related"."annotation_ptr_id") WHERE ( "pim_annotation"."thing_id" = E'∴' OR "pim_related"."related_to_id" = E'∴' ) ORDER BY "pim_annotation"."lastModified" DESC;
- 19. NoSQL?
- 20. NoSQL?
- 21. “How FriendFeed uses MySQL to store schema-less data” -- http://bret.appspot.com/entry/how-friendfeed-uses-mysql
- 22. Use PostgreSQL as RDF document- oriented database
- 23. Single Thing class Many concrete Annotation classes TEXT field `attributes’ for free-form RDF
- 24. No JOINs
- 25. Rules Keep existing code (when possible) Keep existing behaviour Keep magic localized
- 26. I. New code RDFField & URIRefField using rdflib Customized RDF serialization
- 27. II. Analysis Extract existing schema from model code Declare schema in RDF Glue code for attribute access to RDF data
- 28. nfo:Bookmark rdfs:subClassOf pimo:Thing ; grfs:className "Bookmark" ; grfs:label "nfo:Bookmark" ; grfs:pluralLabel "nfo:Bookmarks" ; grfs:isGuiCreatable "true"^^xsd:boolean ; grfs:labelProperties ( dct:title rdfs:label nfo:bookmarks ) ; grfs:shortSummaryInfoProperties ( nfo:bookmarks ) . nao:description a rdfs:Property ; rdfs:domain pimo:Thing, pimo:Person, pimo:Event, nfo:Bookmark, pimo:Project, pimo:Person, nfo:FileDataObject, pimo:Topic, pimo:Location, pimo:Task, nmo:Email, pimo:Question, pimo:Organization, pimo:Note, pimo:Collection; grfs:attributeName "description" ; grfs:ftsFullText "true"^^xsd:boolean ; grfs:additionalShortSummaryInfo "false"^^xsd:boolean . nfo:bookmarks a rdfs:Property ; rdfs:domain nfo:Bookmark ; grfs:attributeName "bookmarks" ; grfs:ftsFullText "true"^^xsd:boolean ; grfs:additionalShortSummaryInfo "true"^^xsd:boolean .
- 29. SELF_URI = URIRef('self:#') def __getattr__(self, attr): property_uri = attribute_uri(attr) oo = list(self.attributes.objects( self.SELF_URI, property_uri)) if not oo: raise AttributeError(attr) if len(oo) == 1: return oo[0].toPython() return set([o.toPython() for o in oo])
- 30. III. Details Run test suite Find most common error Adapt test or change code Repeat for three weeks
- 31. IV. Tweaking Data migration Refactor APIs Optimize
- 32. Success!