test/win: fix some environment assumptions #7912

fix #7909
fix #7910

test/functional/core/job_spec.lua

@@ -9,6 +9,7 @@ local command = helpers.command
 local wait = helpers.wait
 local iswin = helpers.iswin
 local get_pathsep = helpers.get_pathsep
+local pathroot = helpers.pathroot
 local nvim_set = helpers.nvim_set
 local expect_twostreams = helpers.expect_twostreams
 local Screen = require('test.functional.ui.screen')
@@ -63,7 +64,7 @@ describe('jobs', function()
       nvim('command', "let j = jobstart('pwd', g:job_opts)")
     end
     eq({'notification', 'stdout',
-      {0, {(iswin() and [[C:\]] or '/'), ''}}}, next_msg())
+      {0, {pathroot(), ''}}}, next_msg())
     eq({'notification', 'stdout', {0, {''}}}, next_msg())
     eq({'notification', 'exit', {0, 0}}, next_msg())
   end)

test/functional/eval/hostname_spec.lua

@@ -1,7 +1,9 @@
 local helpers = require('test.functional.helpers')(after_each)
+local eq = helpers.eq
 local ok = helpers.ok
 local call = helpers.call
 local clear = helpers.clear
+local iswin = helpers.iswin
 
 describe('hostname()', function()
   before_each(clear)
@@ -11,7 +13,8 @@ describe('hostname()', function()
     ok(string.len(actual) > 0)
     if call('executable', 'hostname') == 1 then
       local expected = string.gsub(call('system', 'hostname'), '[\n\r]', '')
-      helpers.eq(expected, actual)
+      eq((iswin() and expected:upper() or expected),
+         (iswin() and actual:upper() or actual))
     end
   end)
 end)

test/functional/helpers.lua

@@ -603,6 +603,11 @@ local function get_pathsep()
   return funcs.fnamemodify('.', ':p'):sub(-1)
 end
 
+local function pathroot()
+  local pathsep = package.config:sub(1,1)
+  return iswin() and (nvim_dir:sub(1,2)..pathsep) or '/'
+end
+
 -- Returns a valid, platform-independent $NVIM_LISTEN_ADDRESS.
 -- Useful for communicating with child instances.
 local function new_pipename()
@@ -736,6 +741,7 @@ local module = {
   meth_pcall = meth_pcall,
   NIL = mpack.NIL,
   get_pathsep = get_pathsep,
+  pathroot = pathroot,
   missing_provider = missing_provider,
   alter_slashes = alter_slashes,
   hexdump = hexdump,