test: 添加 Utils 纯函数单元测试 (测试计划 02)

覆盖 xml, hash, stringUtils, semver, uuid, format, frontmatterParser,
file, glob, diff 共 10 个模块的纯函数测试。
json.ts 因模块加载链路过重暂跳过。
共 190 个测试用例（含已有 array/set）全部通过。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/utils/__tests__/semver.test.ts

@@ -0,0 +1,98 @@
+import { describe, expect, test } from "bun:test";
+import { gt, gte, lt, lte, satisfies, order } from "../semver";
+
+describe("gt", () => {
+  test("returns true when a > b", () => {
+    expect(gt("2.0.0", "1.0.0")).toBe(true);
+  });
+
+  test("returns false when a < b", () => {
+    expect(gt("1.0.0", "2.0.0")).toBe(false);
+  });
+
+  test("returns false when equal", () => {
+    expect(gt("1.0.0", "1.0.0")).toBe(false);
+  });
+});
+
+describe("gte", () => {
+  test("returns true when a > b", () => {
+    expect(gte("2.0.0", "1.0.0")).toBe(true);
+  });
+
+  test("returns true when equal", () => {
+    expect(gte("1.0.0", "1.0.0")).toBe(true);
+  });
+
+  test("returns false when a < b", () => {
+    expect(gte("1.0.0", "2.0.0")).toBe(false);
+  });
+});
+
+describe("lt", () => {
+  test("returns true when a < b", () => {
+    expect(lt("1.0.0", "2.0.0")).toBe(true);
+  });
+
+  test("returns false when a > b", () => {
+    expect(lt("2.0.0", "1.0.0")).toBe(false);
+  });
+
+  test("returns false when equal", () => {
+    expect(lt("1.0.0", "1.0.0")).toBe(false);
+  });
+});
+
+describe("lte", () => {
+  test("returns true when a < b", () => {
+    expect(lte("1.0.0", "2.0.0")).toBe(true);
+  });
+
+  test("returns true when equal", () => {
+    expect(lte("1.0.0", "1.0.0")).toBe(true);
+  });
+
+  test("returns false when a > b", () => {
+    expect(lte("2.0.0", "1.0.0")).toBe(false);
+  });
+});
+
+describe("satisfies", () => {
+  test("matches exact version", () => {
+    expect(satisfies("1.2.3", "1.2.3")).toBe(true);
+  });
+
+  test("matches range", () => {
+    expect(satisfies("1.2.3", ">=1.0.0")).toBe(true);
+  });
+
+  test("does not match out-of-range version", () => {
+    expect(satisfies("0.9.0", ">=1.0.0")).toBe(false);
+  });
+
+  test("matches caret range", () => {
+    expect(satisfies("1.2.3", "^1.0.0")).toBe(true);
+  });
+
+  test("does not match major bump in caret", () => {
+    expect(satisfies("2.0.0", "^1.0.0")).toBe(false);
+  });
+});
+
+describe("order", () => {
+  test("returns 1 when a > b", () => {
+    expect(order("2.0.0", "1.0.0")).toBe(1);
+  });
+
+  test("returns -1 when a < b", () => {
+    expect(order("1.0.0", "2.0.0")).toBe(-1);
+  });
+
+  test("returns 0 when equal", () => {
+    expect(order("1.0.0", "1.0.0")).toBe(0);
+  });
+
+  test("compares patch versions", () => {
+    expect(order("1.0.1", "1.0.0")).toBe(1);
+  });
+});