jcoffey-dev
41fb7875d0
dns.reverse came back empty inside the image while the resolver answered the PTR, so About showed only the address. Ask for the PTR record of the in-addr.arpa / ip6.arpa name directly.
50 lines
2.1 KiB
TypeScript
50 lines
2.1 KiB
TypeScript
import { test, beforeEach } from "node:test";
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import assert from "node:assert/strict";
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import { clearNodeCache, mailNode, ptrName } from "./nodes.js";
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/**
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* About names the mail node by the PTR of the address the server's name
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* resolves to from the webmail -- the local node, where a host entry pins it.
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*/
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beforeEach(() => clearNodeCache());
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const lookup = (address: string) => async () => ({ address });
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test("the node is named by its address's PTR, without the trailing dot", async () => {
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const n = await mailNode("https://mail.example.com", lookup("192.0.2.2"), async () => ["mx2.example.com."]);
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assert.deepEqual(n, { host: "mail.example.com", address: "192.0.2.2", name: "mx2.example.com" });
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});
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test("an address without a PTR still shows the address", async () => {
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const n = await mailNode("https://mail.example.com", lookup("192.0.2.3"), async () => { throw new Error("ENOTFOUND"); });
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assert.deepEqual(n, { host: "mail.example.com", address: "192.0.2.3", name: null });
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});
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test("a name that doesn't resolve says so instead of failing", async () => {
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let reversed = false;
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const n = await mailNode("https://mail.example.com", async () => { throw new Error("ENOTFOUND"); }, async () => { reversed = true; return []; });
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assert.deepEqual(n, { host: "mail.example.com", address: null, name: null });
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assert.equal(reversed, false);
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});
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test("the answer is cached for a minute, then looked up again", async () => {
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let calls = 0;
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const count = async () => { calls++; return { address: "192.0.2.1" }; };
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const rev = async () => ["mail.example.com"];
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await mailNode("https://mail.example.com", count, rev, 0);
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await mailNode("https://mail.example.com", count, rev, 59_000);
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assert.equal(calls, 1);
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await mailNode("https://mail.example.com", count, rev, 61_000);
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assert.equal(calls, 2);
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});
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test("the PTR name is built for IPv4 and IPv6 alike", () => {
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assert.equal(ptrName("192.0.2.52"), "52.2.0.192.in-addr.arpa");
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assert.equal(
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ptrName("2001:db8::25"),
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"5.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa",
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);
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assert.equal(ptrName("::1"), "1" + ".0".repeat(31) + ".ip6.arpa");
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});
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