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penguin-harness/packages/server/test/proxy.test.ts
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2026-08-06 20:21:26 +08:00

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TypeScript

/**
* Unit tests for the outbound-proxy module's pure parts: the NO_PROXY loopback merge
* and the dispatcher choice per switch state. No real network and no global install —
* installGlobalProxyDispatcher (fetch replacement) runs only in the production entry.
*/
import { describe, expect, it } from "vitest";
import { Agent, EnvHttpProxyAgent } from "undici";
import { buildProxyDispatcher, mergedNoProxy } from "../src/net/proxy.js";
describe("mergedNoProxy", () => {
it("yields exactly the loopback names when the environment has no NO_PROXY", () => {
expect(mergedNoProxy({})).toBe("localhost,127.0.0.1,::1");
});
it("appends the loopback names after the environment's entries", () => {
expect(mergedNoProxy({ NO_PROXY: "example.com,.corp.internal" })).toBe(
"example.com,.corp.internal,localhost,127.0.0.1,::1",
);
});
it("prefers the lowercase spelling, like undici itself", () => {
expect(mergedNoProxy({ no_proxy: "a.example", NO_PROXY: "b.example" })).toBe(
"a.example,localhost,127.0.0.1,::1",
);
});
it("does not duplicate loopback names already present (case-insensitively)", () => {
expect(mergedNoProxy({ NO_PROXY: "LOCALHOST,::1" })).toBe("LOCALHOST,::1,127.0.0.1");
});
it("survives messy separators (comma/whitespace mix, empty segments)", () => {
expect(mergedNoProxy({ NO_PROXY: " example.com ,, other.example " })).toBe(
"example.com,other.example,localhost,127.0.0.1,::1",
);
});
});
describe("buildProxyDispatcher", () => {
it("on → EnvHttpProxyAgent (proxy env honored), off → plain Agent (direct)", async () => {
const on = buildProxyDispatcher(true, {});
const off = buildProxyDispatcher(false, {});
try {
expect(on).toBeInstanceOf(EnvHttpProxyAgent);
expect(off).toBeInstanceOf(Agent);
expect(off).not.toBeInstanceOf(EnvHttpProxyAgent);
} finally {
await on.close();
await off.close();
}
});
});