fix(dir-filter): look for first parent project

In order to see if the directory should be scanned we need to check
upward for the first project (assuming that no file can be contained
within two or more projects at the same time).

Furthermore Ive changed some variable names and added a log if the
directory is ignored because it is determined not to be from the
solution project.

Author: Dynge

lua/neotest-vstest/init.lua

@@ -130,6 +130,34 @@ local function create_adapter(config)
     return true
   end
 
+  ---@param fullpath string the path of the file to start searching from
+  ---@param stop_at string the parent directory to stop searching at
+  ---@return string[] a list of reachable projects (either parent or subfolder projects)
+  local function projects_reachable_from(fullpath, stop_at)
+    local parent_project = vim.fs.find(function(path, _)
+      return path:match("%.[cf]sproj$")
+    end, {
+      upward = true,
+      type = "file",
+      stop = stop_at,
+      path = fullpath,
+      limit = 1,
+    })
+    if vim.tbl_isempty(parent_project) then
+      -- There may be subfolders containing relevant projects
+      return vim.fs.find(function(path, _)
+        return path:match("%.[cf]sproj$")
+      end, {
+        upward = false,
+        type = "file",
+        path = fullpath,
+        limit = math.huge,
+      })
+    else
+      return parent_project
+    end
+  end
+
   function DotnetNeotestAdapter.filter_dir(name, rel_path, root)
     local dotnet_utils = require("neotest-vstest.dotnet_utils")
     local logger = require("neotest.logging")
@@ -143,26 +171,26 @@ 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,
-      })
+      local projects = projects_reachable_from(fullpath, root)
 
       return vim
         .iter(solution_info and solution_info.projects or {})
         :map(function(proj)
           return 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
+        :any(function(sln_project_file)
+          for _, project_file in ipairs(project_files) do
+            if vim.fs.normalize(sln_project_file) == vim.fs.normalize(projects) then
               return true
             end
           end
+          logger.debug(
+            string.format(
+              "neotest-vstest: file '%s' is not a part of the solution '%s'",
+              rel_path,
+              solution_info.solution_file
+            )
+          )
           return false
         end)
     else