nvim/TEST_DIAGNOSTICS.md

LSP Diagnostic Test Files

These files are designed to trigger LSP diagnostics of all types to test the Paper Tonic Modern colorscheme's diagnostic virtual text colors.

Test Files

test-diagnostics.lua

Lua file with intentional errors for lua_ls (Lua Language Server).

Expected diagnostics:

• Errors (red): Undefined variables/functions, type mismatches, invalid operations, wrong argument counts
• Warnings (orange): Unused variables, shadowing, unreachable code, lowercase globals
• Hints (green): Redundant code, style issues

Note: lua_ls provides the best mix of diagnostic levels.

test-diagnostics.php

PHP file with intentional errors for Intelephense (PHP Language Server).

Expected diagnostics:

• Errors (red): Most issues appear as errors by default in Intelephense
  • Undefined functions/variables
  • Type mismatches
  • Wrong argument counts
  • Invalid method calls

Note: Intelephense is strict and reports most issues as errors. To see warnings/hints, configure in .nvim.lua:

return {
  lsp = {
    intelephense = {
      settings = {
        intelephense = {
          diagnostics = {
            undefinedSymbols = true,
            undefinedVariables = true,
            unusedSymbols = "hint",  -- Show unused as hints
          }
        }
      }
    }
  }
}

test-diagnostics.js

JavaScript file with intentional errors for ts_ls (TypeScript Language Server).

Expected diagnostics:

• Errors (red): Undefined variables/functions, invalid property access, missing parameters
• Warnings (orange): Unreachable code, type comparison issues, duplicate cases
• Hints (green): const vs let suggestions
• Info (blue): Unnecessary operations

How to Use

1. Open any test file in Neovim:

   nvim test-diagnostics.lua
   # or
   nvim test-diagnostics.php
   # or
   nvim test-diagnostics.js
   

2. Wait for LSP to attach and analyze the file (1-2 seconds)

3. Check the virtual text diagnostics at the end of lines with issues

4. Use :LspInfo to verify the LSP server is attached

Color Reference

The Paper Tonic Modern colorscheme uses these colors for diagnostics:

• DiagnosticError (virtual text): #d70000 (bright red) on #ffefef background
• DiagnosticWarn (virtual text): #d75f00 (orange) on #ece0e0 background
• DiagnosticInfo (virtual text): #8989af (blue) on #e0e0ec background
• DiagnosticHint (virtual text): #89af89 (green) on #e0ece0 background

Testing Checklist

• Errors show in red with red undercurl
• Warnings show in orange with orange undercurl
• Hints show in green
• Info messages show in blue
• Virtual text is readable against light background
• Sign column icons show correct colors
• Diagnostic floating windows display correctly

Debug Command

Use the <leader>hi keymap to inspect highlight info under cursor and verify diagnostic colors are applied correctly.