feat: 增强 expect 规则系统，支持多种 body 校验方法和操作符

- 新增 body 分组校验：contains、regex、json（JSONPath）、css（CSS选择器）、xpath
- 新增操作符系统：equals、contains、match、empty、exists、gte、lte、gt、lt
- 新增 headers 响应头校验
- 引入 cheerio、xpath、@xmldom/xmldom 依赖
- BREAKING: expect.bodyContains 迁移至 expect.body.contains

tests/server/checker/fetcher.test.ts

@@ -1,33 +1,82 @@
 import { describe, expect, test } from "bun:test";
 import { checkExpect } from "../../../src/server/checker/fetcher";
 
+const emptyHeaders: Record<string, string> = {};
+
 describe("checkExpect", () => {
   test("无 expect 配置时 matched 为 true", () => {
-    expect(checkExpect(200, "ok", 100, undefined)).toBe(true);
+    expect(checkExpect(200, "ok", 100, emptyHeaders, undefined)).toBe(true);
   });
 
   test("status 匹配", () => {
-    expect(checkExpect(200, "", 100, { status: [200, 201] })).toBe(true);
-    expect(checkExpect(201, "", 100, { status: [200, 201] })).toBe(true);
-    expect(checkExpect(404, "", 100, { status: [200, 201] })).toBe(false);
+    expect(checkExpect(200, "", 100, emptyHeaders, { status: [200, 201] })).toBe(true);
+    expect(checkExpect(201, "", 100, emptyHeaders, { status: [200, 201] })).toBe(true);
+    expect(checkExpect(404, "", 100, emptyHeaders, { status: [200, 201] })).toBe(false);
   });
 
-  test("bodyContains 匹配", () => {
-    expect(checkExpect(200, "hello world", 100, { bodyContains: "hello" })).toBe(true);
-    expect(checkExpect(200, "hello world", 100, { bodyContains: "missing" })).toBe(false);
+  test("headers 匹配", () => {
+    const headers = { "content-type": "application/json", "x-custom": "test" };
+    expect(checkExpect(200, "", 100, headers, { headers: { "Content-Type": "application/json" } })).toBe(true);
+    expect(checkExpect(200, "", 100, headers, { headers: { "Content-Type": "text/html" } })).toBe(false);
+    expect(checkExpect(200, "", 100, headers, { headers: { "X-Missing": "test" } })).toBe(false);
+  });
+
+  test("body.contains 匹配", () => {
+    expect(checkExpect(200, "hello world", 100, emptyHeaders, { body: { contains: "hello" } })).toBe(true);
+    expect(checkExpect(200, "hello world", 100, emptyHeaders, { body: { contains: "missing" } })).toBe(false);
+  });
+
+  test("body.regex 匹配", () => {
+    expect(checkExpect(200, "status: ok", 100, emptyHeaders, { body: { regex: "status.*ok" } })).toBe(true);
+    expect(checkExpect(200, "status: error", 100, emptyHeaders, { body: { regex: "status.*ok" } })).toBe(false);
+  });
+
+  test("body.json 匹配", () => {
+    expect(
+      checkExpect(200, JSON.stringify({ status: "ok" }), 100, emptyHeaders, { body: { json: { "$.status": "ok" } } }),
+    ).toBe(true);
+    expect(
+      checkExpect(200, JSON.stringify({ status: "error" }), 100, emptyHeaders, {
+        body: { json: { "$.status": "ok" } },
+      }),
+    ).toBe(false);
+  });
+
+  test("body.json 解析失败", () => {
+    expect(checkExpect(200, "not json", 100, emptyHeaders, { body: { json: { "$.status": "ok" } } })).toBe(false);
+  });
+
+  test("body 多种方法 AND 组合", () => {
+    expect(
+      checkExpect(200, "healthy", 100, emptyHeaders, {
+        body: {
+          contains: "healthy",
+          regex: "healthy",
+        },
+      }),
+    ).toBe(true);
+
+    expect(
+      checkExpect(200, "healthy", 100, emptyHeaders, {
+        body: {
+          contains: "healthy",
+          regex: "unhealthy",
+        },
+      }),
+    ).toBe(false);
   });
 
   test("maxLatencyMs 匹配", () => {
-    expect(checkExpect(200, "", 100, { maxLatencyMs: 200 })).toBe(true);
-    expect(checkExpect(200, "", 300, { maxLatencyMs: 200 })).toBe(false);
-    expect(checkExpect(200, "", 200, { maxLatencyMs: 200 })).toBe(true);
+    expect(checkExpect(200, "", 100, emptyHeaders, { maxLatencyMs: 200 })).toBe(true);
+    expect(checkExpect(200, "", 300, emptyHeaders, { maxLatencyMs: 200 })).toBe(false);
+    expect(checkExpect(200, "", 200, emptyHeaders, { maxLatencyMs: 200 })).toBe(true);
   });
 
   test("多条 expect 全部通过", () => {
     expect(
-      checkExpect(200, "healthy", 100, {
+      checkExpect(200, "healthy", 100, emptyHeaders, {
         status: [200],
-        bodyContains: "healthy",
+        body: { contains: "healthy" },
         maxLatencyMs: 200,
       }),
     ).toBe(true);
@@ -35,9 +84,33 @@ describe("checkExpect", () => {
 
   test("多条 expect 部分失败", () => {
     expect(
-      checkExpect(200, "healthy", 500, {
+      checkExpect(200, "healthy", 500, emptyHeaders, {
         status: [200],
-        bodyContains: "healthy",
+        body: { contains: "healthy" },
+        maxLatencyMs: 200,
+      }),
+    ).toBe(false);
+  });
+
+  test("status + headers + body + maxLatencyMs 全组合", () => {
+    const headers = { "content-type": "application/json" };
+    expect(
+      checkExpect(200, JSON.stringify({ status: "ok" }), 100, headers, {
+        status: [200],
+        headers: { "Content-Type": "application/json" },
+        body: { contains: "ok", json: { "$.status": "ok" } },
+        maxLatencyMs: 200,
+      }),
+    ).toBe(true);
+  });
+
+  test("全组合中 headers 失败", () => {
+    const headers = { "content-type": "text/html" };
+    expect(
+      checkExpect(200, JSON.stringify({ status: "ok" }), 100, headers, {
+        status: [200],
+        headers: { "Content-Type": "application/json" },
+        body: { contains: "ok", json: { "$.status": "ok" } },
         maxLatencyMs: 200,
       }),
     ).toBe(false);