Merge pull request #4 from lsp-client/copilot/add-basic-availability-tests

Add integration tests for all supported language servers

Author: observerw

tests/conftest.py

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+"""Shared test fixtures and utilities for LSP CLI tests."""
+
+import subprocess
+from pathlib import Path
+
+
+class BaseLSPTest:
+    """Base class for LSP CLI tests with common helper methods."""
+
+    def run_lsp_command(self, *args, timeout=30):
+        """Run an lsp command and return the result."""
+        result = subprocess.run(
+            ["uv", "run", "lsp"] + list(args),
+            capture_output=True,
+            text=True,
+            timeout=timeout,
+            cwd=Path(__file__).parent.parent,
+        )
+        return result

tests/fixtures/.gitignore

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+# Build artifacts
+node_modules/
+target/
+*.pyc
+__pycache__/
+
+# Lock files that might be generated
+package-lock.json
+yarn.lock
+Cargo.lock

tests/fixtures/README.md

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+# Test Fixtures
+
+This directory contains minimal test projects for each supported language in LSP CLI.
+
+## Purpose
+
+These fixtures are used by the language support tests (`test_language_support.py`) to verify that LSP CLI can correctly:
+- Detect and start language servers for each supported language
+- Manage server lifecycle (start, list, stop)
+- Handle multiple language servers simultaneously
+
+## Structure
+
+Each subdirectory contains a minimal but valid project for its respective language:
+
+- **go_project/**: Go project with `go.mod` and simple main package
+- **rust_project/**: Rust project with `Cargo.toml` and src directory
+- **typescript_project/**: TypeScript project with `package.json`, `tsconfig.json`, and TypeScript file
+- **javascript_project/**: JavaScript project with `package.json` and ES module
+- **deno_project/**: Deno project with `deno.json` configuration
+
+## Requirements
+
+For the tests to work, the following language servers must be installed:
+- `basedpyright` (Python)
+- `gopls` (Go)
+- `rust-analyzer` (Rust)
+- `typescript-language-server` (TypeScript/JavaScript)
+- `deno` (Deno)
+
+However, the tests will skip or fail gracefully if the required language server is not installed or cannot be started for a project.
+
+## Maintenance
+
+These fixtures should remain minimal and focused. They exist only to verify basic LSP server integration, not to test language-specific features.

tests/fixtures/deno_project/deno.json

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+{
+  "tasks": {
+    "run": "deno run main.ts"
+  }
+}

tests/fixtures/deno_project/main.ts

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+/**
+ * A simple greeter class
+ */
+export class Greeter {
+  private name: string;
+
+  /**
+   * Creates a new Greeter instance
+   * @param name The name to greet
+   */
+  constructor(name: string) {
+    this.name = name;
+  }
+
+  /**
+   * Returns a greeting message
+   * @returns The greeting message
+   */
+  greet(): string {
+    return `Hello, ${this.name}!`;
+  }
+}
+
+const greeter = new Greeter("World");
+console.log(greeter.greet());

tests/fixtures/go_project/go.mod

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+module example.com/hello
+
+go 1.21

tests/fixtures/go_project/main.go

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+package main
+
+import "fmt"
+
+// Greeter provides greeting functionality
+type Greeter struct {
+	name string
+}
+
+// NewGreeter creates a new Greeter instance
+func NewGreeter(name string) *Greeter {
+	return &Greeter{name: name}
+}
+
+// Greet returns a greeting message
+func (g *Greeter) Greet() string {
+	return fmt.Sprintf("Hello, %s!", g.name)
+}
+
+func main() {
+	greeter := NewGreeter("World")
+	fmt.Println(greeter.Greet())
+}

tests/fixtures/javascript_project/index.js

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+/**
+ * A simple greeter class
+ */
+export class Greeter {
+  /**
+   * Creates a new Greeter instance
+   * @param {string} name - The name to greet
+   */
+  constructor(name) {
+    this.name = name;
+  }
+
+  /**
+   * Returns a greeting message
+   * @returns {string} The greeting message
+   */
+  greet() {
+    return `Hello, ${this.name}!`;
+  }
+}
+
+const greeter = new Greeter("World");
+console.log(greeter.greet());

tests/fixtures/javascript_project/package.json

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+{
+  "name": "hello-javascript",
+  "version": "1.0.0",
+  "description": "Test JavaScript project",
+  "main": "index.js",
+  "type": "module"
+}

tests/fixtures/rust_project/Cargo.toml

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+[package]
+name = "hello"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]