feat: 配置加载模块

tests/core/config.test.ts

@@ -0,0 +1,94 @@
+import { describe, it, expect, beforeEach, afterEach } from "bun:test";
+import { mkdir, writeFile, rm } from "node:fs/promises";
+import { join } from "node:path";
+import { loadConfig, findProjectRoot, getRuneDir } from "../../src/core/config.ts";
+
+const TMP_DIR = join(import.meta.dir, "__tmp_config_test__");
+
+beforeEach(async () => {
+  await mkdir(TMP_DIR, { recursive: true });
+});
+
+afterEach(async () => {
+  await rm(TMP_DIR, { recursive: true, force: true });
+});
+
+describe("findProjectRoot", () => {
+  it("当前目录存在 .rune/ 时返回当前目录", async () => {
+    await mkdir(join(TMP_DIR, ".rune"));
+    expect(findProjectRoot(TMP_DIR)).toBe(TMP_DIR);
+  });
+
+  it("子目录中向上查找到 .rune/", async () => {
+    await mkdir(join(TMP_DIR, ".rune"));
+    const sub = join(TMP_DIR, "src", "commands");
+    await mkdir(sub, { recursive: true });
+    expect(findProjectRoot(sub)).toBe(TMP_DIR);
+  });
+
+  it("找不到 .rune/ 时返回 null", () => {
+    expect(findProjectRoot("/tmp/__nonexistent__")).toBeNull();
+  });
+});
+
+describe("loadConfig", () => {
+  it("无配置文件时返回默认配置", async () => {
+    await mkdir(join(TMP_DIR, ".rune"));
+    const config = await loadConfig(TMP_DIR);
+    expect(config.stages.discuss).toBeDefined();
+    expect(config.stages.plan).toBeDefined();
+    expect(config.stages.build).toBeDefined();
+    expect(config.stages.archive).toBeDefined();
+  });
+
+  it("用户配置覆盖默认配置（全量替换）", async () => {
+    const runeDir = join(TMP_DIR, ".rune");
+    await mkdir(runeDir, { recursive: true });
+    await writeFile(
+      join(runeDir, "config.yaml"),
+      `stages:
+  discuss:
+    prompt: 自定义讨论提示词
+`,
+    );
+    const config = await loadConfig(TMP_DIR);
+    expect(config.stages.discuss!.prompt).toBe("自定义讨论提示词");
+    expect(config.stages.plan).toBeDefined();
+    expect(config.stages.build).toBeDefined();
+    expect(config.stages.archive).toBeDefined();
+  });
+
+  it("用户配置 plan 时完全替换内置 documents", async () => {
+    const runeDir = join(TMP_DIR, ".rune");
+    await mkdir(runeDir, { recursive: true });
+    await writeFile(
+      join(runeDir, "config.yaml"),
+      `stages:
+  plan:
+    documents:
+      - name: spec
+        prompt: 生成规格文档
+`,
+    );
+    const config = await loadConfig(TMP_DIR);
+    expect(config.stages.plan!.documents).toHaveLength(1);
+    expect(config.stages.plan!.documents[0].name).toBe("spec");
+  });
+
+  it("YAML 解析错误时返回默认配置", async () => {
+    const runeDir = join(TMP_DIR, ".rune");
+    await mkdir(runeDir, { recursive: true });
+    await writeFile(
+      join(runeDir, "config.yaml"),
+      `stages: [invalid yaml {{{`,
+    );
+    const config = await loadConfig(TMP_DIR);
+    expect(config.stages.discuss).toBeDefined();
+  });
+});
+
+describe("getRuneDir", () => {
+  it("返回 .rune 目录路径", () => {
+    expect(getRuneDir("/project")).toBe("/project/.rune");
+  });
+});