retry test + sleep mock

Author: HantingZhang2

package.json

@@ -97,6 +97,7 @@
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-unused-imports": "^2.0.0",
     "jest": "^29.5.0",
+    "nock": "^13.3.3",
     "prettier": "^3.0.0",
     "ts-jest": "^29.1.0",
     "ts-node": "^10.9.1",

tests/api/retry.test.ts

@@ -0,0 +1,51 @@
+import nock from "nock";
+import { IsomorphicFetchHttpLibrary } from "../../packages/datadog-api-client-common/http/isomorphic-fetch";
+import {
+    RequestContext,
+    HttpMethod,
+  } from "../../packages/datadog-api-client-common/";
+
+
+describe("IsomorphicFetchHttpLibrary Retry Test", () => {
+
+    const fakeRequestContext = new RequestContext("https://retry.test.com",HttpMethod.GET);
+
+  beforeAll(() => {
+    nock.disableNetConnect(); // Prevent actual network requests
+  });
+
+  afterAll(() => {
+    nock.cleanAll();
+    nock.enableNetConnect(); // Re-enable network connections
+  });
+
+  it("should retry based on response code and retry settings", async () => {
+    // Set up your mock responses
+    nock("https://retry.test.com")
+      .get("/")
+      .reply(429, {}, { 'x-ratelimit-reset': '1' })
+
+      .get("/")
+      .reply(429, {}, { 'x-ratelimit-reset': '1' }) 
+
+      .get("/")
+      .reply(429, {}, { 'x-ratelimit-reset': '1' })
+
+      .get("/")
+      .reply(200, { data: "success" }); // Simulate successful response
+
+    const httpLibrary = new IsomorphicFetchHttpLibrary();
+    httpLibrary['sleep'] = jest.fn(() => Promise.resolve());
+
+    httpLibrary.enableRetry = true;
+    httpLibrary.maxRetries = 3;
+    httpLibrary.backoffBase = 2;
+    httpLibrary.backoffMultiplier = 2;
+
+    const response = await httpLibrary.send(fakeRequestContext);
+
+    expect(response.httpStatusCode).toBe(200);
+
+    expect(nock.isDone()).toBe(true); // Ensure all expected requests were made
+  });
+});