refactor: use a Set instead of Array for agents list

docs/agents.md

@@ -36,7 +36,7 @@ export const test: CustomHttpAgent = {
 };
 
 // Note: push it to the package agents list
-agents.push(test);
+agents.add(test);
 ```
 
 The **agent** property is an Undici Agent.

examples/agent.mjs

@@ -15,7 +15,7 @@ const yoda = {
   preprod: "",
   dev: "https://yoda.myunisoft.fr:1407"
 };
-httpie.agents.push(yoda);
+httpie.agents.add(yoda);
 
 const { data } = await httpie.get("/yoda/api/v1/ipa/healthz");
 console.log(data);

package.json

@@ -31,6 +31,7 @@
   "homepage": "https://github.com/MyUnisoft/httpie#readme",
   "devDependencies": {
     "@myunisoft/eslint-config": "^1.3.2",
+    "@slimio/is": "^1.5.1",
     "@types/content-type": "^1.1.5",
     "@types/jest": "^26.0.24",
     "@types/lru-cache": "^5.1.1",

src/agents.ts

@@ -36,7 +36,7 @@ export interface CustomHttpAgent {
   limit?: InlineCallbackAction;
 }
 
-export const agents: CustomHttpAgent[] = [];
+export const agents: Set<CustomHttpAgent> = new Set();
 
 /**
  * @description Detect if a given string URI is matching a given Agent custom path.

test/agents.spec.ts

@@ -1,3 +1,6 @@
+// Import Third-party Dependencies
+import is from "@slimio/is";
+
 // Import Internal Dependencies
 import { windev } from "./helpers";
 import * as Agents from "../src/agents";
@@ -7,7 +10,8 @@ const kWindevMonitoringURL = "https://ws-dev.myunisoft.fr/ws_monitoring";
 
 describe("agents", () => {
   it("should be an Array of CustomHttpAgent and must remain extensible", () => {
-    expect(Array.isArray(Agents.agents)).toStrictEqual(true);
+    expect(is.set(Agents.agents)).toStrictEqual(true);
+
     expect(Object.isExtensible(Agents.agents)).toStrictEqual(true);
   });
 });

test/helpers.ts

@@ -16,6 +16,6 @@ const windev: CustomHttpAgent = {
   preprod: "https://ws-dev.myunisoft.fr",
   dev: "https://ws-dev.myunisoft.fr"
 };
-agents.push(windev);
+agents.add(windev);
 
 export { windev };

test/server/index.ts

@@ -39,7 +39,7 @@ export async function createServer(customPath = "local", port = 3000) {
     preprod: `http://localhost:${port}/`,
     dev: `http://localhost:${port}/`
   };
-  agents.push(serverAgent);
+  agents.add(serverAgent);
 
   server.get("/", async() => {
     return {