Copy and add axios-cached-dns-resolve test

package.json

@@ -23,7 +23,7 @@
         "start-server": "node server/server.js",
         "start-server-dev": "cross-env NODE_ENV=development node server/server.js",
         "build": "vite build --config ./config/vite.config.js",
-        "test": "node test/prepare-test-server.js && node server/server.js --port=3002 --data-dir=./data/test/ --test",
+        "test": "ava test/axios-cached-dns-resolve-test.js -timeout=2m && node test/prepare-test-server.js && node server/server.js --port=3002 --data-dir=./data/test/ --test",
         "test-with-build": "npm run build && npm test",
         "jest": "node test/prepare-jest.js && npm run jest-frontend && npm run jest-backend",
         "jest-frontend": "cross-env TEST_FRONTEND=1 jest --config=./config/jest-frontend.config.js",
@@ -133,15 +133,18 @@
         "@vitejs/plugin-vue": "~1.9.4",
         "@vue/compiler-sfc": "~3.2.31",
         "aedes": "^0.46.3",
+        "ava": "^3.15.0",
         "babel-plugin-rewire": "~1.2.0",
         "concurrently": "^7.1.0",
         "core-js": "~3.18.3",
         "cross-env": "~7.0.3",
+        "delay": "^5.0.0",
         "dns2": "~2.0.1",
         "eslint": "~8.14.0",
         "eslint-plugin-vue": "~8.7.1",
         "jest": "~27.2.5",
         "jest-puppeteer": "~6.0.3",
+        "lru-cache": "^7.7.1",
         "npm-check-updates": "^12.5.9",
         "postcss-html": "^1.3.1",
         "puppeteer": "~13.1.3",

test/axios-cached-dns-resolve-test.js

@@ -0,0 +1,191 @@
+/*
+ * From: https://github.com/tcollinsworth/axios-cached-dns-resolve/blob/master/__tests__/test.js
+ * But it converted to CommonJS
+ */
+const ava = require("ava");
+const delay = require("delay");
+const LRUCache = require("lru-cache");
+const axios = require("axios");
+const axiosCachingDns = require("esm")(module)("axios-cached-dns-resolve");
+
+const test = ava.serial
+
+let axiosClient
+
+test.beforeEach(() => {
+    axiosCachingDns.config.dnsTtlMs = 1000
+    axiosCachingDns.config.dnsIdleTtlMs = 5000
+    axiosCachingDns.config.cacheGraceExpireMultiplier = 2
+    axiosCachingDns.config.backgroundScanMs = 100
+
+    axiosCachingDns.cacheConfig.ttl = (axiosCachingDns.config.dnsTtlMs * axiosCachingDns.config.cacheGraceExpireMultiplier)
+
+    axiosCachingDns.config.cache = new LRUCache(axiosCachingDns.cacheConfig)
+
+    axiosClient = axios.create({
+        timeout: 5000,
+        // maxRedirects: 0,
+    })
+
+    axiosCachingDns.registerInterceptor(axiosClient)
+
+    axiosCachingDns.startBackgroundRefresh()
+    axiosCachingDns.startPeriodicCachePrune()
+})
+
+test.after.always(() => {
+    axiosCachingDns.config.cache.clear()
+})
+
+test('query google with baseURL and relative url', async (t) => {
+    axiosCachingDns.registerInterceptor(axios)
+
+    const { data } = await axios.get('/finance', {
+        baseURL: 'http://www.google.com',
+        // headers: { Authorization: `Basic ${basicauth}` },
+    })
+    t.truthy(data)
+    t.is(1, axiosCachingDns.getStats().dnsEntries)
+    t.is(1, axiosCachingDns.getStats().misses)
+})
+
+test('query google caches and after idle delay uncached', async (t) => {
+    const resp = await axiosClient.get('http://amazon.com')
+    t.truthy(resp.data)
+    t.truthy(axiosCachingDns.config.cache.get('amazon.com'))
+    await delay(6000)
+    t.falsy(axiosCachingDns.config.cache.get('amazon.com'))
+
+    const expectedStats = {
+        dnsEntries: 0,
+        // refreshed: 4, variable
+        hits: 0,
+        misses: 2,
+        idleExpired: 1,
+        errors: 0,
+        lastError: 0,
+        lastErrorTs: 0,
+    }
+
+    const stats = axiosCachingDns.getStats()
+    delete stats.refreshed
+    t.deepEqual(expectedStats, stats)
+})
+
+test('query google caches and refreshes', async (t) => {
+    await axiosClient.get('http://amazon.com')
+    const { updatedTs } = axiosCachingDns.config.cache.get('amazon.com')
+    const timeoutTime = Date.now() + 5000
+    // eslint-disable-next-line no-constant-condition
+    while (true) {
+        const dnsEntry = axiosCachingDns.config.cache.get('amazon.com')
+        if (!dnsEntry) t.fail('dnsEntry missing or expired')
+        // console.log(dnsEntry)
+        if (updatedTs !== dnsEntry.updatedTs) break
+        if (Date.now() > timeoutTime) t.fail()
+        // eslint-disable-next-line no-await-in-loop
+        await delay(10)
+    }
+
+    const expectedStats = {
+        dnsEntries: 1,
+        // refreshed: 5, variable
+        hits: 0,
+        misses: 3,
+        idleExpired: 1,
+        errors: 0,
+        lastError: 0,
+        lastErrorTs: 0,
+    }
+
+    const stats = axiosCachingDns.getStats()
+    delete stats.refreshed
+    t.deepEqual(expectedStats, stats)
+})
+
+test('query two services, caches and after one idle delay uncached', async (t) => {
+    await axiosClient.get('http://amazon.com')
+
+    await axiosClient.get('http://microsoft.com')
+    const { lastUsedTs } = axiosCachingDns.config.cache.get('microsoft.com')
+    t.is(1, axiosCachingDns.config.cache.get('microsoft.com').nextIdx)
+
+    await axiosClient.get('http://microsoft.com')
+    t.is(2, axiosCachingDns.config.cache.get('microsoft.com').nextIdx)
+
+    t.truthy(lastUsedTs < axiosCachingDns.config.cache.get('microsoft.com').lastUsedTs)
+
+    t.is(2, axiosCachingDns.config.cache.size)
+    await axiosClient.get('http://microsoft.com')
+    t.is(3, axiosCachingDns.config.cache.get('microsoft.com').nextIdx)
+
+    t.falsy(lastUsedTs === axiosCachingDns.config.cache.get('microsoft.com').lastUsedTs)
+
+    t.is(2, axiosCachingDns.config.cache.size)
+    await delay(4000)
+    t.is(1, axiosCachingDns.config.cache.size)
+    await delay(2000)
+    t.is(0, axiosCachingDns.config.cache.size)
+
+    const expectedStats = {
+        dnsEntries: 0,
+        // refreshed: 17, variable
+        hits: 2,
+        misses: 5,
+        idleExpired: 3,
+        errors: 0,
+        lastError: 0,
+        lastErrorTs: 0,
+    }
+
+    const stats = axiosCachingDns.getStats()
+    delete stats.refreshed
+    t.deepEqual(expectedStats, stats)
+})
+
+test('validate axios config not altered', async (t) => {
+    const baseURL = 'http://microsoft.com'
+    const axiosConfig = { baseURL }
+    const custAxiosClient = axios.create(axiosConfig)
+
+    axiosCachingDns.registerInterceptor(custAxiosClient)
+
+    await custAxiosClient.get('/')
+    t.is(baseURL, axiosConfig.baseURL)
+    await custAxiosClient.get('/')
+    t.is(baseURL, axiosConfig.baseURL)
+})
+
+test('validate axios get config not altered', async (t) => {
+    const url = 'http://microsoft.com'
+    const custAxiosClient = axios.create()
+
+    const reqConfig = {
+        method: 'get',
+        url,
+    }
+
+    axiosCachingDns.registerInterceptor(custAxiosClient)
+
+    await custAxiosClient.get(url, reqConfig)
+    t.is(url, reqConfig.url)
+    await custAxiosClient.get(url, reqConfig)
+    t.is(url, reqConfig.url)
+})
+
+test('validate axios request config not altered', async (t) => {
+    const url = 'http://microsoft.com'
+    const custAxiosClient = axios.create()
+
+    const reqConfig = {
+        method: 'get',
+        url,
+    }
+
+    axiosCachingDns.registerInterceptor(custAxiosClient)
+
+    await custAxiosClient.request(reqConfig)
+    t.is(url, reqConfig.url)
+    await custAxiosClient.request(reqConfig)
+    t.is(url, reqConfig.url)
+})