test: Remove run-functional-tests.py

Now that the lua client is available, python/lupa are no longer necessary to run
the functional tests. The helper functions previously defined in
run-functional-tests.py were adapted to test/functional/helpers.lua.

test/functional/helpers.lua

@@ -1,3 +1,96 @@
+local Loop = require('nvim.loop')
+local MsgpackStream = require('nvim.msgpack_stream')
+local AsyncSession = require('nvim.async_session')
+local Session = require('nvim.session')
+
+local nvim_prog = os.getenv('NVIM_PROG') or 'build/bin/nvim'
+local nvim_argv = {nvim_prog, '-u', 'NONE', '-N', '--embed'}
+
+if os.getenv('VALGRIND') then
+  local log_file = os.getenv('VALGRIND_LOG') or 'valgrind-%p.log'
+  local valgrind_argv = {'valgrind', '-q', '--tool=memcheck',
+                         '--leak-check=yes', '--track-origins=yes',
+                         '--suppressions=.valgrind.supp',
+                         '--log-file='..log_file}
+  if os.getenv('VALGRIND_GDB') then
+    table.insert(valgrind_argv, '--vgdb=yes')
+    table.insert(valgrind_argv, '--vgdb-error=0')
+  end
+  local len = #valgrind_argv
+  for i = 1, #nvim_argv do
+    valgrind_argv[i + len] = nvim_argv[i]
+  end
+  nvim_argv = valgrind_argv
+end
+
+local session
+do
+  local loop = Loop.new()
+  local msgpack_stream = MsgpackStream.new(loop)
+  local async_session = AsyncSession.new(msgpack_stream)
+  session = Session.new(async_session)
+  loop:spawn(nvim_argv)
+end
+
+local function request(method, ...)
+  local status, rv = session:request(method, ...)
+  if not status then
+    error(rv[2])
+  end
+  return rv
+end
+
+local function nvim_command(cmd)
+  request('vim_command', cmd)
+end
+
+local function nvim_eval(expr)
+  return request('vim_eval', expr)
+end
+
+local function nvim_feed(input, mode)
+  mode = mode or ''
+  request('vim_feedkeys', input, mode)
+end
+
+local function buffer_slice(start, stop, buffer_idx)
+  local include_end = false
+  if not stop then
+    stop = -1
+    include_end = true
+  end
+  local buffer = request('vim_get_buffers')[buffer_idx or 1]
+  local slice = request('buffer_get_line_slice', buffer, start or 0, stop,
+                        true, include_end)
+  return table.concat(slice, '\n')
+end
+
+local function nvim_replace_termcodes(input)
+  return request('vim_replace_termcodes', input, false, true, true )
+end
+
+local function dedent(str)
+  -- find minimum common indent across lines
+  local indent = nil
+  for line in str:gmatch('[^\n]+') do
+    local line_indent = line:match('^%s+') or ''
+    if indent == nil or #line_indent < #indent then
+      indent = line_indent
+    end
+  end
+  if #indent == 0 then
+    -- no minimum common indent
+    return str
+  end
+  -- create a pattern for the indent
+  indent = indent:gsub('%s', '%%s')
+  -- strip it from the first line
+  str = str:gsub('^'..indent, '')
+  -- strip it from the remaining lines
+  str = str:gsub('[\n]'..indent, '\n')
+  return str
+end
+
 local function clear()
   nvim_command('call BeforeEachTest()')
 end