Improved test for utils

autoload/tablemode/utils.vim

@@ -52,9 +52,7 @@ function! tablemode#utils#strlen(text)
   return strlen(substitute(a:text, '.', 'x', 'g'))
 endfunction
 
-" Return the number of bytes in a string after expanding tabs to spaces.  {{{2
+function! tablemode#utils#StrDisplayWidth(string) "{{{2
-" This expansion is done based on the current value of 'tabstop'
-function! tablemode#utils#StrDisplayWidth(string)
   if exists('*strdisplaywidth')
     return strdisplaywidth(a:string)
   else
@@ -77,4 +75,3 @@ function! tablemode#utils#StrDisplayWidth(string)
     return rv
   endif
 endfunction
-

t/utils.vim

@@ -3,6 +3,7 @@ source t/config/options.vim
 
 call vspec#hint({'scope': 'tablemode#utils#scope()', 'sid': 'tablemode#utils#sid()'})
 
+describe 'utils'
   describe 'line'
     it 'should return the current line number'
       Expect tablemode#utils#line('.') == line('.')
@@ -31,3 +32,16 @@ describe 'strlen'
       Expect tablemode#utils#strlen(string) == 11
     end
   end
+
+  describe 'strdisplaywidth'
+    it 'should return the display width of a string correctly'
+      let string = 'this is a test'
+      Expect tablemode#utils#StrDisplayWidth(string) == 14
+    end
+
+    it 'should return the display width of a unicode string correctly'
+      let string = '測試 is good.'
+      Expect tablemode#utils#StrDisplayWidth(string) == 13
+    end
+  end
+end