fix(test_harness): resolved invalid escape sequence error caused by Windows backslash in filepaths. (#519)

Author: linguini1

lua/plenary/busted.lua

@@ -215,6 +215,8 @@ clear = mod.clear
 assert = require "luassert"
 
 mod.run = function(file)
+  file = file:gsub("\\", "/")
+
   print("\n" .. HEADER)
   print("Testing: ", file)
 

lua/plenary/test_harness.lua

@@ -42,6 +42,7 @@ end
 
 function harness.test_directory(directory, opts)
   print "Starting..."
+  directory = directory:gsub("\\", "/")
   local minimal = not opts or not opts.init or opts.minimal or opts.minimal_init
 
   opts = vim.tbl_deep_extend("force", {

plugin/plenary.vim

@@ -1,9 +1,9 @@
 
 " Create command for running busted
 command! -nargs=1 -complete=file PlenaryBustedFile
-      \ lua require('plenary.busted').run(vim.fn.expand("<args>"))
+      \ lua require('plenary.busted').run(vim.fn.expand([[<args>]]))
 
 command! -nargs=+ -complete=file PlenaryBustedDirectory
-      \ lua require('plenary.test_harness').test_directory_command("<args>")
+      \ lua require('plenary.test_harness').test_directory_command([[<args>]])
 
 nnoremap <Plug>PlenaryTestFile :lua require('plenary.test_harness').test_directory(vim.fn.expand("%:p"))<CR>