eslint for test files

.eslintrc

@@ -7,5 +7,15 @@
       "no-console": "error",
       "@typescript-eslint/explicit-module-boundary-types": "off",
       "@typescript-eslint/no-empty-function": "off"
-   }
+   },
+   "overrides": [
+      {
+         "files": ["test/**"],
+         "plugins": ["jest"],
+         "extends": ["plugin:jest/recommended"],
+         "rules": {
+            "jest/prefer-snapshot-hint": ["error", "always"]
+         }
+      }
+   ]
 }

package.json

@@ -12,7 +12,7 @@
    "packageManager": "[email protected]",
    "scripts": {
       "build": "tsc",
-      "lint": "eslint src/**/*.ts",
+      "lint": "eslint \"{src,test}/**/*.ts\"",
       "test": "cross-env NODE_OPTIONS=\"--experimental-vm-modules --no-warnings\" jest",
       "test:ci": "pnpm run lint && pnpm run test --coverage"
    },
@@ -36,6 +36,7 @@
       "@typescript-eslint/parser": "^6.7.4",
       "cross-env": "^7.0.3",
       "eslint": "^8.23.0",
+      "eslint-plugin-jest": "^27.4.2",
       "jest": "^29.7.0",
       "ts-jest": "^29.1.1"
    },

src/error.ts

@@ -1,7 +1,7 @@
 import { Logger } from './logger'
 
 export class IllegalShapeError extends Error {
-   constructor(message: string, readonly input?: any) {
+   constructor(message: string, readonly input?: unknown) {
       super(input ? `${message}: ${JSON.stringify(input)}` : message)
    }
 }