test: reproduce the problem by jest

__tests__/checksums.test.ts

@@ -1,6 +1,29 @@
 import * as checksums from '../src/checksums'
+import nock from 'nock'
 
 test('fetches wrapper jars checksums', async () => {
   const validChecksums = await checksums.fetchValidChecksums(false)
   expect(validChecksums.length).toBeGreaterThan(10)
 })
+
+describe('retry', () => {
+  afterEach(() => {
+    nock.cleanAll()
+  })
+
+  describe('for /versions/all API', () => {
+    test('retry three times', async () => {
+      nock('https://services.gradle.org', {allowUnmocked: true})
+        .get('/versions/all')
+        .times(3)
+        .replyWithError({
+          message: 'connect ECONNREFUSED 104.18.191.9:443',
+          code: 'ECONNREFUSED'
+        })
+
+      const validChecksums = await checksums.fetchValidChecksums(false)
+      expect(validChecksums.length).toBeGreaterThan(10)
+      nock.isDone()
+    })
+  })
+})

package-lock.json

@@ -3136,7 +3136,8 @@
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/growly/-/growly-1.3.0.tgz",
       "integrity": "sha1-8QdIy+dq+WS3yWyTxrzCivEgwIE=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "har-schema": {
       "version": "2.0.0",
@@ -3594,6 +3595,7 @@
       "resolved": "https://registry.npmjs.org/is-wsl/-/is-wsl-2.2.0.tgz",
       "integrity": "sha512-fKzAra0rGJUUBwGBgNkHZuToZcn+TtXHpeCgmkMJMMYx1sQDYaCSyjJBSCa2nH1DGm7s3n1oBnohoVTBaN7Lww==",
       "dev": true,
+      "optional": true,
       "requires": {
         "is-docker": "^2.0.0"
       }
@@ -5338,6 +5340,12 @@
       "integrity": "sha1-vMbEmkKihA7Zl/Mj6tpezRguC/4=",
       "dev": true
     },
+    "lodash.set": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/lodash.set/-/lodash.set-4.3.2.tgz",
+      "integrity": "sha1-2HV7HagH3eJIFrDWqEvqGnYjCyM=",
+      "dev": true
+    },
     "lodash.sortby": {
       "version": "4.7.0",
       "resolved": "https://registry.npmjs.org/lodash.sortby/-/lodash.sortby-4.7.0.tgz",
@@ -5516,6 +5524,18 @@
       "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==",
       "dev": true
     },
+    "nock": {
+      "version": "13.0.11",
+      "resolved": "https://registry.npmjs.org/nock/-/nock-13.0.11.tgz",
+      "integrity": "sha512-sKZltNkkWblkqqPAsjYW0bm3s9DcHRPiMOyKO/PkfJ+ANHZ2+LA2PLe22r4lLrKgXaiSaDQwW3qGsJFtIpQIeQ==",
+      "dev": true,
+      "requires": {
+        "debug": "^4.1.0",
+        "json-stringify-safe": "^5.0.1",
+        "lodash.set": "^4.3.2",
+        "propagate": "^2.0.0"
+      }
+    },
     "node-int64": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/node-int64/-/node-int64-0.4.0.tgz",
@@ -5533,6 +5553,7 @@
       "resolved": "https://registry.npmjs.org/node-notifier/-/node-notifier-8.0.1.tgz",
       "integrity": "sha512-BvEXF+UmsnAfYfoapKM9nGxnP+Wn7P91YfXmrKnfcYCx6VBeoN5Ez5Ogck6I8Bi5k4RlpqRYaw75pAwzX9OphA==",
       "dev": true,
+      "optional": true,
       "requires": {
         "growly": "^1.3.0",
         "is-wsl": "^2.2.0",
@@ -5923,6 +5944,12 @@
         "sisteransi": "^1.0.4"
       }
     },
+    "propagate": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/propagate/-/propagate-2.0.1.tgz",
+      "integrity": "sha512-vGrhOavPSTz4QVNuBNdcNXePNdNMaO1xj9yBeH1ScQPjk/rhg9sSlCXPhMkFuaNNW/syTvYqsnbIJxMBfRbbag==",
+      "dev": true
+    },
     "psl": {
       "version": "1.8.0",
       "resolved": "https://registry.npmjs.org/psl/-/psl-1.8.0.tgz",
@@ -6409,7 +6436,8 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/shellwords/-/shellwords-0.1.1.tgz",
       "integrity": "sha512-vFwSUfQvqybiICwZY5+DAWIPLKsWO31Q91JSKl3UYv+K5c2QRPzn0qzec6QPu1Qc9eHYItiP3NdJqNVqetYAww==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "signal-exit": {
       "version": "3.0.3",
@@ -7206,7 +7234,8 @@
       "version": "8.3.0",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.0.tgz",
       "integrity": "sha512-fX6Z5o4m6XsXBdli9g7DtWgAx+osMsRRZFKma1mIUsLCz6vRvv+pz5VNbyu9UEDzpMWulZfvpgb/cmDXVulYFQ==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "v8-compile-cache": {
       "version": "2.1.1",

package.json

@@ -40,6 +40,7 @@
     "jest": "26.4.2",
     "jest-circus": "26.4.2",
     "js-yaml": "3.14.0",
+    "nock": "^13.0.11",
     "prettier": "2.1.2",
     "ts-jest": "26.4.0",
     "typescript": "4.0.3"