Rubyspec aims to provide an executable specification for the Ruby programming language to precisely define the language and allow implementations to test compatibility. It describes the development of Ruby 1.9 as requiring changes to the language, class hierarchy, encoding support, and object coercion. Implementations like JRuby, Rubinius, IronRuby, and MacRuby have progressed based on tests in Rubyspec. Future development of Ruby 2.0 may again require changes captured in the evolving specification.

1. Rubyspec y el largo camino hacia
Ruby 1.9
David Calavera

2. Convención
Ruby == generalización
Ruby 1.9 == implementación

3. Acceptance Testing

4. Acceptance Testing
como especificación

5. ¿este modelo es
válido para
desarrollar un
lenguaje?

6. ¿este modelo es
válido para copiar un
lenguaje?

7. ¿podemos usar la
documentación como
especificación?

8. NO

9. File.new(‘hello.rb’)

10. -------------------------------------------------------------- File::new
File.new(filename, mode="r") => file
File.new(filename [, mode [, perm]]) => file
------------------------------------------------------------------------
Opens the file named by _filename_ according to _mode_ (default is
``r'') and returns a new +File+ object. See the description of
class +IO+ for a description of _mode_. The file mode may
optionally be specified as a +Fixnum+ by _or_-ing together the
flags (O_RDONLY etc, again described under +IO+). Optional
permission bits may be given in _perm_. These mode and permission
bits are platform dependent; on Unix systems, see +open(2)+ for
details.
f = File.new("testfile", "r")
f = File.new("newfile", "w+")
f = File.new("newfile", File::CREAT|File::TRUNC|File::RDWR, 0644)

11. ruby 1.8.8dev (2009-11-19 revision 25863) [i386-darwin9.8.0]
File.new
- returns a new File with mode string
- returns a new File with mode num
- returns a new File with modus num and permissions
- creates the file and returns writable descriptor when called with 'w' mode and r-o permissions
- opens the existing file, does not change permissions even when they are specified
- returns a new File with modus fd
- creates a new file when use File::EXCL mode
- raises an Errorno::EEXIST if the file exists when create a new file with File::CREAT|File::EXCL
- creates a new file when use File::WRONLY|File::APPEND mode
- raises an Errno::EINVAL error with File::RDONLY|File::WRONLY
- creates a new file when use File::WRONLY|File::TRUNC mode
- coerces filename using to_str
- raises a TypeError if the first parameter can't be coerced to string
- raises a TypeError if the first parameter is nil
- raises an Errno::EBADF if the first parameter is an invalid file descriptor
- raises an ArgumentError when it receives more than three parameters
- opens directories
Finished in 0.025401 seconds
1 file, 17 examples, 32 expectations, 0 failures, 0 errors

12. Rubyspec

13. “Rubyspec is a project to
write a complete, executable
specification for the Ruby
programming language.”

14. Necesidad
tener una definición del
lenguaje razonablemente
precisa

15. Necesidad
dejar de hacer ingeniería
inversa

16. Meta
dejar de pensar sobre qué
implementación corre
nuestro código

17. Ruby
JRuby
Rubinius
IronRuby
MacRuby

18. Ruby
JRuby
Rubinius
IronRuby
MacRuby

19. Mspec
+
Rubyspec

20. Mspec
mspec core/file/new_spec.rb

21. Mspec
ruby_version_is "1.9" do
ruby_version_is "1.8.7" do
ruby_version_is "".."1.9" do

22. Mspec
platform_is :windows do
platform_is_not :windows do
platform_is :darwin, :java do
platform_is :wordsize => 32 do

23. Mspec
compilant_on :jruby do
not_compilant_on :rubinius do
not_supported_on :jruby do
deviates_on :ironruby do
extended_on :macruby do

24. Mspec
runner_is :mspec do
conflicts_with :SomeClass do
as_superuser do

25. Mspec
quarantine! do
ruby_bug "#1582", "1.9.2" do

26. Mspec
especificaciones compartidas
configurable por versión
especificaciones taggables

27. Rubyspec
describe "File.new" do
it "returns a new File with mode string" do
@fh = File.new(@file, 'w')
@fh.class.should == File
File.exists?(@file).should == true
end
end

28. Rubyspec
ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin9.8.0]
2854 files, 11483 examples, 36622 expectations, 20 failures, 12 errors
ruby 1.9.2dev (2009-09-26 trunk 25102) [i386-darwin9.8.0]
2847 files, 13017 examples, 177090 expectations, 236 failures, 442 errors

29. El camino hacia 1.9

30. Cambios del lenguaje
==
Mantener varios parsers

31. Cambios del lenguaje
{hoge: :fuga}

32. Cambios del lenguaje
Proc.new{|&p|}

33. Cambios de jerarquía
==
Problemas de tipado

34. Cambios de jerarquía
BasicObject

35. Cambios de jerarquía
!String.include?
Enumerable

36. Soporte de encoding
==
Reescribir IO

37. Soporte de encoding
‘ ’.encode!

38. Soporte de encoding
default_external
vs
default_internal

39. Soporte de encoding
File.open(‘file.txt’,
‘r:iso-8859-1:utf-8’)

40. Class coercion

41. Object coercion
to_path

42. El camino recorrido

43. 100
75
50
25
0
IronRuby Rubinius JRuby MacRuby

44. ¿qué pasará cuando
empiece el desarrollo
de Ruby 2.0?

45. ¡¡¡Contribuye!!!

46. ¡Gracias!
www.rubyspec.org
www.thinkincode.net
@calavera
calavera@apache.org

47. Fotos
http://www.flickr.com/photos/katgloor/3652188896/
http://www.flickr.com/photos/carowallis1/328329703/
http://www.flickr.com/photos/simpologist/46161407/
http://www.flickr.com/photos/nicmcphee/250890495/