From c8a7ae050ac2b9177888ac7add1d6094b4a1ab30 Mon Sep 17 00:00:00 2001
From: Oliver Metz <softwaredevdad@gmail.com>
Date: Sun, 7 Jun 2026 10:30:07 +0200
Subject: [PATCH] fix: convert Path to string before append in build_tool.lua

## Problem
Running tests on a Spring/Maven Project crashes with the following
error, even after successfully running `:NeotestJava setup` to install
JUnit jar:

```
Error executing vim.schedule lua callback:
.../neotest-java/lua/neotest-java/build_tool/build_tool.lua:32:
.../neotest-java/lua/neotest-java/model/path.lua:112:
attempt to concatenate a table value
```

### Cause
`get_spring_property_filepaths` passes a `Path` object to
`Path:append()`, which expects a `string`.

### Fix
Add `:to_string()` to convert the Path before appending.
---
 lua/neotest-java/build_tool/build_tool.lua | 45 +++++++++++-----------
 1 file changed, 23 insertions(+), 22 deletions(-)

diff --git a/lua/neotest-java/build_tool/build_tool.lua b/lua/neotest-java/build_tool/build_tool.lua
index 521de309..f0248cac 100644
--- a/lua/neotest-java/build_tool/build_tool.lua
+++ b/lua/neotest-java/build_tool/build_tool.lua
@@ -13,31 +13,32 @@
 ---@param deps neotest-java.BuildToolDeps
 ---@return neotest-java.BuildTool
 local function create_build_tool(config, deps)
-	---@type neotest-java.BuildTool
-	return {
-		get_build_dirname = function(base_dir)
-			return config.get_build_dirname(base_dir, deps)
-		end,
+  ---@type neotest-java.BuildTool
+  return {
+    get_build_dirname = function(base_dir)
+      return config.get_build_dirname(base_dir, deps)
+    end,
 
-		get_project_filename = function()
-			return config.project_filename
-		end,
+    get_project_filename = function()
+      return config.project_filename
+    end,
 
-		get_artifact_id = function(base_dir)
-			return config.get_artifact_id(base_dir, deps)
-		end,
+    get_artifact_id = function(base_dir)
+      return config.get_artifact_id(base_dir, deps)
+    end,
 
-		get_spring_property_filepaths = function(roots)
-			local base_dirs = vim.iter(roots)
-				:map(function(root)
-					return root:append(config.get_build_dirname(root, deps))
-				end)
-				:map(config.get_spring_subdirs)
-				:flatten()
-				:totable()
-			return deps.generate_spring_property_filepaths(base_dirs)
-		end,
-	}
+    get_spring_property_filepaths = function(roots)
+      local base_dirs = vim
+        .iter(roots)
+        :map(function(root)
+          return root:append(config.get_build_dirname(root, deps):to_string())
+        end)
+        :map(config.get_spring_subdirs)
+        :flatten()
+        :totable()
+      return deps.generate_spring_property_filepaths(base_dirs)
+    end,
+  }
 end
 
 return create_build_tool