Locale.Message: Refactor test

test/Locale/Message.vimspec

@@ -7,9 +7,14 @@ Describe Locale.Message
  let M = vital#vital#new().import('Locale.Message')
  try
  language message ja_JP.UTF-8
- let ja_available = 1
+ let language_available = 'ja'
  catch /^Vim\%((\a\+)\)\=:E197/
- let ja_available = 0
+ try
+ language message en_US.UTF-8
+ let language_available = 'en'
+ catch /^Vim\%((\a\+)\)\=:E197/
+ let language_available = ''
+ endtry
  endtry
  End
 
@@ -19,16 +24,14 @@ Describe Locale.Message
 
  Describe .get_lang()
  It returns current language of message
- if ja_available
+ if language_available == 'ja'
  language message ja_JP.UTF-8
  Assert Equals(M.get_lang(), 'ja')
+ elseif language_available == 'en'
+ language message en_US.UTF-8
+ Assert Equals(M.get_lang(), 'en')
  else
- try
- language message en_US.UTF-8
- Assert Equals(M.get_lang(), 'en')
- catch /^Vim\%((\a\+)\)\=:E197/
- Skip Need ja_JP.UTF-8 or en_US.UTF-8 in your system locale
- endtry
+ Skip Need ja_JP.UTF-8 or en_US.UTF-8 in your system locale
  endif
  End
  It returns 'en' if current language is 'C'
@@ -47,16 +50,14 @@ Describe Locale.Message
 
  Describe .get()
  Before each
- if ja_available
+ if language_available == 'ja'
  language message ja_JP.UTF-8
  let self.m = M.new(s:text_path)
+ elseif language_available == 'en'
+ language message en_US.UTF-8
+ let self.m = M.new(s:text_path)
  else
- try
- language message en_US.UTF-8
- let self.m = M.new(s:text_path)
- catch /^Vim\%((\a\+)\)\=:E197/
- Skip Need ja_JP.UTF-8 or en_US.UTF-8 in your system locale
- endtry
+ Skip Need ja_JP.UTF-8 or en_US.UTF-8 in your system locale
  endif
  End
  It returns translated text if it exists
@@ -73,16 +74,14 @@ Describe Locale.Message
 
  Describe ._()
  Before each
- if ja_available
+ if language_available == 'ja'
  language message ja_JP.UTF-8
  let self.m = M.new(s:text_path)
+ elseif language_available == 'en'
+ language message en_US.UTF-8
+ let self.m = M.new(s:text_path)
  else
- try
- language message en_US.UTF-8
- let self.m = M.new(s:text_path)
- catch /^Vim\%((\a\+)\)\=:E197/
- Skip Need ja_JP.UTF-8 or en_US.UTF-8 in your system locale
- endtry
+ Skip Need ja_JP.UTF-8 or en_US.UTF-8 in your system locale
  endif
  End
  It can use like `get()`