Rip out tsdx, configure jest etc manually

Author: af

jest.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+};

package.json

@@ -15,12 +15,10 @@
     "src"
   ],
   "scripts": {
-    "build": "tsdx build",
-    "coverage": "tsdx test --coverage",
-    "lint": "tsdx lint src tests",
-    "prepare": "tsdx build",
-    "start": "tsdx watch",
-    "test": "tsdx test"
+    "build": "tsc",
+    "coverage": "jest --coverage",
+    "lint": "tsc && prettier -list-different --write src tests",
+    "test": "jest"
   },
   "repository": {
     "type": "git",
@@ -35,14 +33,19 @@
     "environment variable",
     "validation"
   ],
+  "dependencies": {},
   "devDependencies": {
+    "@types/jest": "26.0.24",
+    "@types/node": "16.4.0",
     "husky": "4.3.6",
-    "tsdx": "^0.14.1",
-    "typescript": "^4.1.3"
+    "jest": "27.0.6",
+    "prettier": "2.3.2",
+    "ts-jest": "27.0.4",
+    "tslib": "2.3.0",
+    "typescript": "4.3.5"
   },
   "author": "Aaron Franks",
   "license": "MIT",
-  "dependencies": {},
   "prettier": {
     "printWidth": 100,
     "semi": false,
@@ -51,7 +54,7 @@
   },
   "husky": {
     "hooks": {
-      "pre-commit": "yarn lint --fix",
+      "pre-commit": "yarn lint",
       "pre-push": "yarn test"
     }
   }

src/envalid.ts

@@ -45,5 +45,5 @@ export function customCleanEnv<T, MW>(
  * For more context, see https://github.com/af/envalid/issues/32
  */
 export const testOnly = <T>(defaultValueForTests: T) => {
-  return process.env.NODE_ENV === 'test' ? defaultValueForTests : ((testOnlySymbol as unknown) as T) // T is not strictly correct, but prevents type errors during usage
+  return process.env.NODE_ENV === 'test' ? defaultValueForTests : (testOnlySymbol as unknown as T) // T is not strictly correct, but prevents type errors during usage
 }

src/reporter.ts

@@ -56,7 +56,7 @@ export const defaultReporter = <T = any>(
     colors.yellow('\n Exiting with error code 1'),
     RULE,
   ]
-    .filter(x => !!x)
+    .filter((x) => !!x)
     .join('\n')
 
   logger(output)

src/validators.ts

@@ -17,7 +17,8 @@ const isFQDN = (input: string) => {
 // "best effort" regex-based IP address check
 // If you want a more exhaustive check, create your own custom validator, perhaps wrapping this
 // implementation (the source of the ipv4 regex below): https://github.com/validatorjs/validator.js/blob/master/src/lib/isIP.js
-const ipv4Regex = /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/
+const ipv4Regex =
+  /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/
 const ipv6Regex = /([a-f0-9]+:+)+[a-f0-9]+/
 const isIP = (input: string) => {
   if (!input.length) return false
@@ -27,7 +28,7 @@ const isIP = (input: string) => {
 const EMAIL_REGEX = /^[^@\s]+@[^@\s]+\.[^@\s]+$/ // intentionally non-exhaustive
 
 export const makeValidator = <T>(parseFn: (input: string) => T) => {
-  return function(spec?: Spec<T>): ValidatorSpec<T> {
+  return function (spec?: Spec<T>): ValidatorSpec<T> {
     return { ...spec, _parse: parseFn }
   }
 }
@@ -104,6 +105,7 @@ export function port<T extends number = number>(spec?: Spec<T>) {
 export function url<T extends string = string>(spec?: Spec<T>) {
   return makeValidator((x: string) => {
     try {
+      // @ts-expect-error TS doesn't acknowledge this API by default yet
       new URL(x)
       return x
     } catch (e) {

tests/validators.test.ts

@@ -114,12 +114,12 @@ test('str()', () => {
 })
 
 test('custom types', () => {
-  const alwaysFoo = makeValidator(_x => 'foo')
+  const alwaysFoo = makeValidator((_x) => 'foo')
 
   const fooEnv = cleanEnv({ FOO: 'asdf' }, { FOO: alwaysFoo() })
   expect(fooEnv).toEqual({ FOO: 'foo' })
 
-  const hex10 = makeValidator(x => {
+  const hex10 = makeValidator((x) => {
     if (/^[a-f0-9]{10}$/.test(x)) return x
     throw new Error('need 10 hex chars')
   })

tsconfig.json

@@ -1,16 +1,18 @@
 {
   "compilerOptions": {
+    "outDir": "./dist",
     "rootDir": "./src",
     "strict": true,
-    "module": "esnext",
+    "module": "commonjs",
     "moduleResolution": "node",
     "esModuleInterop": true,
     "importHelpers": true,
     "declaration": true,
     "sourceMap": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
-    "noImplicitReturns": true
+    "noImplicitReturns": true,
+    "lib": ["es2019"]
   },
   "include": ["src"],
   "exclude": [