fix(dir-filter): properly detect upward and downwards for project files

This change updates the dir_filter to use vim.fs.relpath to detect if
the file is a decendant or parent of a relevant project from the
solution.

This change should fix the error as well as be more performant because
we do not need to scan the directory for every file checked.

Author: Dynge

lua/neotest-vstest/init.lua

@@ -143,28 +143,28 @@ local function create_adapter(config)
     local fullpath = vim.fs.joinpath(root, rel_path)
     if solution_dir then
       local solution_info = dotnet_utils.get_solution_info(solution)
-      local project_files = vim.fs.find(function(path, _)
-        return path:match("%.[cf]sproj$")
-      end, {
-        upward = false,
-        type = "file",
-        path = fullpath,
-        limit = math.huge,
-      })
 
-      return vim
+      local is_project_reachable = vim
         .iter(solution_info and solution_info.projects or {})
         :map(function(proj)
-          return proj.proj_file
+          return vim.fs.dirname(proj.proj_file)
         end)
-        :any(function(proj_file)
-          for _, file in ipairs(project_files) do
-            if vim.fs.normalize(proj_file) == vim.fs.normalize(file) then
-              return true
-            end
-          end
-          return false
+        :any(function(project_dir)
+          -- path should be a subdir of a solution project
+          -- or the solution project should be a subdir of the path
+          return vim.fs.relpath(project_dir, fullpath) ~= nil
+            or vim.fs.relpath(fullpath, project_dir) ~= nil
         end)
+      if not is_project_reachable then
+        logger.debug(
+          string.format(
+            "neotest-vstest: file '%s' is not a part of the solution '%s'",
+            rel_path,
+            solution_info.solution_file
+          )
+        )
+      end
+      return is_project_reachable
     else
       return true
     end