Create test/can_open.vim

test/.themisrc

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+" XXX: rewrite generic path
+call themis#option('runtimepath', expand('~/Repository/repl.vim'))
+
+" Add dependency
+call themis#option('runtimepath', expand('~/.vim/bundle/vimproc.vim'))
+call themis#option('runtimepath', expand('~/.vim/bundle/vimshell.vim'))
+
+" Util Functions
+function! UnletReplUserVariables() abort
+  unlet! g:repl_filetype_repl
+  unlet! g:repl_split_command
+endfunction

test/can_open.vim

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+let s:suite  = themis#suite('can_open')
+
+function! s:suite.after_each()
+  call UnletReplUserVariables()
+endfunction
+
+"-------------------"
+
+function! s:suite.some_repl()
+  " repl.vim can open repl
+  setfiletype ruby | Repl
+  new | setfiletype haskell | Repl
+  new | setfiletype erlang  | Repl
+  new | setfiletype python  | Repl
+  " repl.vim cannot open repl
+  " but repl.vim don't throw some exception
+  new | setfiletype unknown | Repl
+endfunction
+
+function! s:suite.some_repl_with_split_command()
+  let g:repl_split_command = 'vertical split'
+  call s:suite.some_repl()
+endfunction