test: 新增测试代码文件

tests/mocks/api-responses.ts

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+export const mockStreamResponse = {
+  type: "message_start" as const,
+  message: {
+    id: "msg_mock_001",
+    type: "message" as const,
+    role: "assistant",
+    content: [],
+    model: "claude-sonnet-4-20250514",
+    stop_reason: null,
+    stop_sequence: null,
+    usage: { input_tokens: 100, output_tokens: 0 },
+  },
+};
+
+export const mockTextBlock = {
+  type: "content_block_start" as const,
+  index: 0,
+  content_block: { type: "text" as const, text: "Mock response" },
+};
+
+export const mockToolUseBlock = {
+  type: "content_block_start" as const,
+  index: 1,
+  content_block: {
+    type: "tool_use" as const,
+    id: "toolu_mock_001",
+    name: "Read",
+    input: { file_path: "/tmp/test.txt" },
+  },
+};
+
+export const mockEndEvent = {
+  type: "message_stop" as const,
+};

tests/mocks/file-system.ts

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+import { mkdtemp, rm, writeFile, mkdir } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+export async function createTempDir(
+  prefix = "claude-test-",
+): Promise<string> {
+  return mkdtemp(join(tmpdir(), prefix));
+}
+
+export async function cleanupTempDir(dir: string): Promise<void> {
+  await rm(dir, { recursive: true, force: true });
+}
+
+export async function writeTempFile(
+  dir: string,
+  name: string,
+  content: string,
+): Promise<string> {
+  const path = join(dir, name);
+  await writeFile(path, content, "utf-8");
+  return path;
+}
+
+export async function createTempSubdir(
+  dir: string,
+  name: string,
+): Promise<string> {
+  const path = join(dir, name);
+  await mkdir(path, { recursive: true });
+  return path;
+}

tests/mocks/fixtures/sample-claudemd.md

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+# Project Instructions
+
+This is a sample CLAUDE.md file for testing purposes.

tests/mocks/fixtures/sample-messages.json

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+{
+  "userMessage": {
+    "role": "user",
+    "content": "Hello, Claude"
+  },
+  "assistantMessage": {
+    "role": "assistant",
+    "content": [
+      { "type": "text", "text": "Hello! How can I help?" }
+    ]
+  },
+  "toolUseMessage": {
+    "role": "assistant",
+    "content": [
+      {
+        "type": "tool_use",
+        "id": "toolu_test_001",
+        "name": "Read",
+        "input": { "file_path": "/tmp/test.txt" }
+      }
+    ]
+  },
+  "toolResultMessage": {
+    "role": "user",
+    "content": [
+      {
+        "type": "tool_result",
+        "tool_use_id": "toolu_test_001",
+        "content": "file contents here"
+      }
+    ]
+  }
+}