claude-code

prompts/16-testing.md

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+# Prompt 16: Add Test Infrastructure & Smoke Tests
+
+## Context
+
+You are working in `/workspaces/claude-code`. The leaked source does not include any test files or test configuration (they were presumably in a separate directory or repo). We need to add a test framework and write smoke tests for core subsystems.
+
+## Task
+
+### Part A: Set up Vitest
+
+```bash
+bun add -d vitest @types/node
+```
+
+Create `vitest.config.ts`:
+```ts
+import { defineConfig } from 'vitest/config'
+import { resolve } from 'path'
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+    include: ['tests/**/*.test.ts'],
+    setupFiles: ['tests/setup.ts'],
+    testTimeout: 30000,
+  },
+  resolve: {
+    alias: {
+      'bun:bundle': resolve(__dirname, 'src/shims/bun-bundle.ts'),
+    },
+  },
+})
+```
+
+Create `tests/setup.ts`:
+```ts
+// Global test setup
+import '../src/shims/preload.js'
+```
+
+Add to `package.json`:
+```json
+{
+  "scripts": {
+    "test": "vitest run",
+    "test:watch": "vitest"
+  }
+}
+```
+
+### Part B: Write unit tests for shims
+
+`tests/shims/bun-bundle.test.ts`:
+- Test `feature()` returns `false` for unknown flags
+- Test `feature()` returns `false` for disabled flags
+- Test `feature()` returns `true` when env var is set
+- Test `feature('ABLATION_BASELINE')` always returns `false`
+
+`tests/shims/macro.test.ts`:
+- Test `MACRO.VERSION` is a string
+- Test `MACRO.PACKAGE_URL` is set
+- Test `MACRO.ISSUES_EXPLAINER` is set
+
+### Part C: Write smoke tests for core modules
+
+`tests/smoke/tools.test.ts`:
+- Test that `getTools()` returns an array
+- Test that each tool has: name, description, inputSchema
+- Test that BashTool, FileReadTool, FileWriteTool are present
+
+`tests/smoke/commands.test.ts`:
+- Test that `getCommands()` returns an array
+- Test that each command has: name, execute function
+- Test that /help and /config commands exist
+
+`tests/smoke/context.test.ts`:
+- Test that `getSystemContext()` returns OS info
+- Test that git status can be collected
+- Test that platform detection works on Linux
+
+`tests/smoke/prompt.test.ts`:
+- Test that `getSystemPrompt()` returns a non-empty array
+- Test that the prompt includes tool descriptions
+- Test that MACRO references are resolved (no `undefined`)
+
+### Part D: Write integration tests (if API key available)
+
+`tests/integration/api.test.ts`:
+- Skip if `ANTHROPIC_API_KEY` is not set
+- Test API client creation
+- Test a simple message (hello world)
+- Test streaming works
+- Test tool use (calculator-style tool call)
+
+`tests/integration/mcp.test.ts`:
+- Test MCP server starts
+- Test MCP client connects
+- Test tool listing
+- Test tool execution roundtrip
+
+### Part E: Write build tests
+
+`tests/build/bundle.test.ts`:
+- Test that `dist/cli.mjs` exists after build
+- Test that it has a shebang
+- Test that it's not empty
+- Test that `node dist/cli.mjs --version` exits cleanly
+
+### Part F: Add pre-commit hook (optional)
+
+If the project uses git hooks, add:
+```bash
+# In package.json or a git hook
+bun run typecheck && bun run test
+```
+
+## Verification
+
+1. `bun run test` runs all tests
+2. Shim tests pass
+3. Smoke tests pass (tools, commands, context, prompts load)
+4. Integration tests are skipped when no API key is set
+5. Integration tests pass when API key is available
+6. Test output is clear and readable