fix: no tests found bug in python files

lua/neotest-python/adapter.lua

@@ -50,16 +50,22 @@ return function(config)
     return script_args
   end
 
+  local function get_root(path)
+    return base.get_root(path) or vim.loop.cwd() or ""
+  end
+
+  local function filter_dir(name)
+    return name ~= "venv"
+  end
+
   ---@type neotest.Adapter
   return {
     name = "neotest-python",
-    root = base.get_root,
-    filter_dir = function(name)
-      return name ~= "venv"
-    end,
+    root = get_root,
+    filter_dir = filter_dir,
     is_test_file = config.is_test_file,
     discover_positions = function(path)
-      local root = base.get_root(path) or vim.loop.cwd() or ""
+      local root = get_root(path)
 
       local python_command = config.get_python_command(root)
       local runner = config.get_runner(python_command)
@@ -79,8 +85,7 @@ return function(config)
     build_spec = function(args)
       local position = args.tree:data()
 
-      local root = base.get_root(position.path) or vim.loop.cwd() or ""
-
+      local root = get_root(position.path)
       local python_command = config.get_python_command(root)
       local runner = config.get_runner(python_command)
 

lua/neotest-python/base.lua

@@ -13,7 +13,7 @@ function M.is_test_file(file_path)
   return vim.startswith(file_name, "test_") or vim.endswith(file_name, "_test.py")
 end
 
-M.module_exists = function(module, python_command)
+local module_exists = function(module, python_command)
   return lib.process.run(vim
     .iter({
       python_command,
@@ -29,9 +29,11 @@ local python_command_mem = {}
 ---@return string[]
 function M.get_python_command(root)
   root = root or vim.loop.cwd()
+
   if python_command_mem[root] then
     return python_command_mem[root]
   end
+
   -- Use activated virtualenv.
   if vim.env.VIRTUAL_ENV then
     python_command_mem[root] = { Path:new(vim.env.VIRTUAL_ENV, "bin", "python").filename }
@@ -152,8 +154,8 @@ function M.get_runner(python_path)
   then
     return vim_test_runner
   end
-  local runner = M.module_exists("pytest", python_path) and "pytest"
-      or M.module_exists("django", python_path) and "django"
+  local runner = module_exists("pytest", python_path) and "pytest"
+      or module_exists("django", python_path) and "django"
       or "unittest"
   stored_runners[command_str] = runner
   return runner

lua/neotest-python/init.lua

@@ -16,6 +16,7 @@ end
 ---@param config neotest-python.AdapterConfig
 local augment_config = function(config)
   local get_python_command = base.get_python_command
+
   if config.python then
     get_python_command = function(root)
       local python = config.python