tests: move/rename/cleanup vspec based tests (#860)

The main motivation is to being able to use normal/other pytest based
tests.

Therefore this moves everything from conftest into test_integration
itself.

test/vspec/completions.vim

@@ -0,0 +1,112 @@
+let g:jedi#completions_command = 'X'
+source plugin/jedi.vim
+
+describe 'completions'
+    before
+        new
+        set filetype=python
+    end
+
+    after
+        " default
+        let g:jedi#popup_select_first = 1
+        bd!
+    end
+
+    it 'longest in completeopt'
+        " This gets set up with Vim only on VimEnter.
+        if has('nvim')
+            Expect stridx(&completeopt, 'longest') > -1
+        else
+            Expect stridx(&completeopt, 'longest') == -1
+            doautocmd VimEnter
+            Expect stridx(&completeopt, 'longest') > -1
+        endif
+
+        " Do not use it for following tests.
+        set completeopt-=longest
+    end
+
+    it 'smart import'
+        exec "normal ifrom os "
+        Expect getline('.') == 'from os import '
+    end
+
+    it 'no smart import after space'
+        exec "normal! ifrom os "
+        exec "normal  a "
+        Expect getline('.') == 'from os  '
+    end
+
+    it 'import'
+        " X is the completion command
+        normal oimporX
+        Expect getline('.') == 'import'
+        normal a subproX
+        Expect getline('.') == 'import subprocess'
+    end
+
+    it 'exception'
+        normal oIndentationErrX
+        Expect getline('.') == 'IndentationError'
+
+        " Do not remap keys (".") here, otherwise this triggers completion in
+        " Neovim already.
+        normal! a().filena
+
+        normal aX
+        Expect getline('.') == 'IndentationError().filename'
+    end
+
+    it 'multi complete'
+        " NOTE: nvim results in "importErr()" here with completeopt+=longest,
+        " but Vim is fine.
+        " This is due to `pumvisible()` in jedi#complete_opened being true
+        " with nvim still, but it is 0 with Vim, i.e. Vim appears to close
+        " the pum already (with the tests).
+        "
+        " This might be a misunderstanding though, since the test might not
+        " expect the "import" keyword to be offered for completion?!
+        normal oImpXErrX()
+        Expect getline('.') == 'ImportError()'
+    end
+
+    it 'cycling through entries popup_select_first=0'
+        set completeopt+=longest
+        let g:jedi#popup_select_first = 0
+        execute "normal oraise impX\<C-n>"
+
+        Expect getline('.') == 'raise ImportError'
+        set completeopt-=longest
+    end
+
+    it 'cycling through entries popup_select_first=1'
+        execute "normal oraise impX\<C-n>"
+        Expect getline('.') == 'raise ImportWarning'
+    end
+
+    it 'cycling through entries popup_select_first=1 and longest'
+        set completeopt+=longest
+        execute "normal oraise impX"
+        Expect getline('.') == 'raise Import'
+
+        " With Neovim pumvisible() is 1 in jedi#complete_opened, which then
+        " triggers the <Down>.  This is not the case with Vim.
+        if has('nvim')
+            execute "normal oraise impX\<C-n>"
+            Expect getline('.') == 'raise ImportWarning'
+
+            execute "normal oraise impX\<C-n>\<C-n>"
+            Expect getline('.') == 'raise imp'
+        else
+            execute "normal oraise impX\<C-n>"
+            Expect getline('.') == 'raise ImportError'
+
+            execute "normal oraise impX\<C-n>\<C-n>"
+            Expect getline('.') == 'raise ImportWarning'
+        endif
+        set completeopt-=longest
+    end
+end
+
+" vim: et:ts=4:sw=4