refactor(test): Consolidate test utilities with unified index

Add test-utils/index.ts as single import point for shared test utilities.
Move createArchivedTask from cli/test-helpers.ts to test-utils/github-mock.ts
since it's used by core tests, not just CLI tests.

Fixes #91

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: dcramer

src/cli/test-helpers.ts

@@ -8,39 +8,18 @@ import * as os from "node:os";
 import { execSync } from "node:child_process";
 import { FileStorage } from "../core/storage/index.js";
 
-import type { ArchivedTask } from "../types.js";
-
 // Re-export shared test utilities from test-utils
 export {
   setupGitHubMock,
   cleanupGitHubMock,
   createIssueFixture,
   createTask,
   createStore,
+  createArchivedTask,
   type GitHubIssueFixture,
   type GitHubMock,
 } from "../test-utils/github-mock.js";
 
-/**
- * Create an ArchivedTask with sensible defaults for testing.
- */
-export function createArchivedTask(
-  overrides: Partial<ArchivedTask> = {},
-): ArchivedTask {
-  return {
-    id: "test-id",
-    parent_id: null,
-    name: "Test archived task",
-    description: "",
-    result: null,
-    completed_at: null,
-    archived_at: new Date().toISOString(),
-    metadata: null,
-    archived_children: [],
-    ...overrides,
-  };
-}
-
 // ============ CLI-specific utilities ============
 
 // Task IDs are 8 lowercase alphanumeric characters

src/core/storage/archive-storage.test.ts

@@ -3,7 +3,7 @@ import * as fs from "node:fs";
 import * as path from "node:path";
 import * as os from "node:os";
 import { ArchiveStorage } from "./archive-storage.js";
-import { createArchivedTask } from "../../cli/test-helpers.js";
+import { createArchivedTask } from "../../test-utils/index.js";
 import type { ArchivedTask } from "../../types.js";
 
 describe("ArchiveStorage", () => {

src/test-utils/github-mock.ts

@@ -4,7 +4,7 @@
  */
 
 import nock from "nock";
-import type { Task, TaskStore } from "../types.js";
+import type { ArchivedTask, Task, TaskStore } from "../types.js";
 
 // ============ GitHub API Mocking ============
 
@@ -359,3 +359,23 @@ export function createTask(overrides: Partial<Task> = {}): Task {
 export function createStore(tasks: Task[] = []): TaskStore {
   return { tasks };
 }
+
+/**
+ * Create an ArchivedTask with sensible defaults for testing.
+ */
+export function createArchivedTask(
+  overrides: Partial<ArchivedTask> = {},
+): ArchivedTask {
+  return {
+    id: "test-id",
+    parent_id: null,
+    name: "Test archived task",
+    description: "",
+    result: null,
+    completed_at: null,
+    archived_at: new Date().toISOString(),
+    metadata: null,
+    archived_children: [],
+    ...overrides,
+  };
+}

src/test-utils/index.ts

@@ -0,0 +1,45 @@
+/**
+ * Unified test utilities for all dex tests.
+ *
+ * This module re-exports all shared test utilities from a single location.
+ * Import from here for general test utilities:
+ *
+ *   import { createTask, testEnv, setupGitHubMock } from "../test-utils/index.js";
+ *
+ * For domain-specific test utilities, use the specialized modules:
+ *   - CLI tests: import from "../cli/test-helpers.js"
+ *   - MCP tests: import from "../mcp/test-helpers.js"
+ */
+
+// Test environment setup
+export {
+  testEnv,
+  initTestEnv,
+  cleanupTestEnv,
+  type TestEnv,
+} from "./test-env.js";
+
+// Vitest re-exports for convenience
+export {
+  describe,
+  it,
+  test,
+  expect,
+  beforeEach,
+  afterEach,
+  beforeAll,
+  afterAll,
+  vi,
+} from "./test-env.js";
+
+// GitHub API mocking and task fixtures
+export {
+  setupGitHubMock,
+  cleanupGitHubMock,
+  createIssueFixture,
+  createTask,
+  createStore,
+  createArchivedTask,
+  type GitHubIssueFixture,
+  type GitHubMock,
+} from "./github-mock.js";