from pathlib import Path
import pytest
from relace_mcp.lsp.languages import clear_lsp_cache, get_lsp_languages
class TestGetLspLanguages:
def test_detects_languages_from_files(self, tmp_path: Path) -> None:
clear_lsp_cache(tmp_path)
(tmp_path / "a.py").write_text("print('x')\n")
(tmp_path / "b.ts").write_text("export const x = 1\n")
(tmp_path / "c.go").write_text("package main\n")
(tmp_path / "d.rs").write_text("fn main() {}\n")
languages = get_lsp_languages(tmp_path)
assert "python" in languages
assert "typescript" in languages
assert "go" in languages
assert "rust" in languages
def test_ignores_node_modules(self, tmp_path: Path) -> None:
clear_lsp_cache(tmp_path)
(tmp_path / "node_modules").mkdir()
(tmp_path / "node_modules" / "x.ts").write_text("export {}\n")
languages = get_lsp_languages(tmp_path)
assert "typescript" not in languages
class TestDetectAvailableLspServers:
def test_detects_installed_servers(self, monkeypatch: pytest.MonkeyPatch) -> None:
"""Should detect servers that are available in PATH."""
from relace_mcp.lsp.languages import detect_available_lsp_servers
# Mock shutil.which to simulate basedpyright being installed
def mock_which(cmd: str) -> str | None:
if cmd == "basedpyright-langserver":
return "/usr/bin/basedpyright-langserver"
return None
monkeypatch.setattr("shutil.which", mock_which)
result = detect_available_lsp_servers()
assert "python" in result
def test_returns_empty_when_no_servers(self, monkeypatch: pytest.MonkeyPatch) -> None:
"""Should return empty set when no LSP servers are installed."""
from relace_mcp.lsp.languages import detect_available_lsp_servers
monkeypatch.setattr("shutil.which", lambda cmd: None)
result = detect_available_lsp_servers()
assert result == frozenset()
