chore: update project tooling

eslint.config.mjs

@@ -1,21 +1,15 @@
 // See: https://eslint.org/docs/latest/use/configure/configuration-files
 
-import path from 'node:path'
-import url from 'node:url'
-import globals from 'globals'
-
 import { FlatCompat } from '@eslint/eslintrc'
 import js from '@eslint/js'
-
 import typescriptParser from '@typescript-eslint/parser'
-import typescriptPlugin from '@typescript-eslint/eslint-plugin'
+import typescriptEslint from '@typescript-eslint/eslint-plugin'
 import jest from 'eslint-plugin-jest'
 import prettier from 'eslint-plugin-prettier'
+import globals from 'globals'
 
-const __filename = url.fileURLToPath(import.meta.url)
-const __dirname = path.dirname(__filename)
 const compat = new FlatCompat({
-  baseDirectory: __dirname,
+  baseDirectory: import.meta.dirname,
   recommendedConfig: js.configs.recommended,
   allConfig: js.configs.all
 })
@@ -35,7 +29,7 @@ export default [
     plugins: {
       jest,
       prettier,
-      '@typescript-eslint': typescriptPlugin
+      '@typescript-eslint': typescriptEslint
     },
 
     languageOptions: {
@@ -51,16 +45,24 @@ export default [
       sourceType: 'module',
 
       parserOptions: {
-        project: ['tsconfig.eslint.json'],
-        tsconfigRootDir: '.'
+        projectService: {
+          allowDefaultProject: [
+            '__fixtures__/*.ts',
+            '__tests__/*.ts',
+            'eslint.config.mjs',
+            'jest.config.js',
+            'rollup.config.ts'
+          ]
+        },
+        tsconfigRootDir: import.meta.dirname
       }
     },
 
     settings: {
       'import/resolver': {
         typescript: {
           alwaysTryTypes: true,
-          project: 'tsconfig.eslint.json'
+          project: 'tsconfig.json'
         }
       }
     },

jest.config.js

@@ -0,0 +1,40 @@
+// See: https://jestjs.io/docs/configuration
+
+/** @type {import('ts-jest').JestConfigWithTsJest} **/
+export default {
+  clearMocks: true,
+  collectCoverage: true,
+  collectCoverageFrom: ['./src/**'],
+  coverageDirectory: './coverage',
+  coveragePathIgnorePatterns: ['/node_modules/', '/dist/'],
+  coverageReporters: ['json-summary', 'text', 'lcov'],
+  // Uncomment the below lines if you would like to enforce a coverage threshold
+  // for your action. This will fail the build if the coverage is below the
+  // specified thresholds.
+  // coverageThreshold: {
+  //   global: {
+  //     branches: 100,
+  //     functions: 100,
+  //     lines: 100,
+  //     statements: 100
+  //   }
+  // },
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleFileExtensions: ['ts', 'js'],
+  preset: 'ts-jest',
+  reporters: ['default'],
+  resolver: 'ts-jest-resolver',
+  testEnvironment: 'node',
+  testMatch: ['**/*.test.ts'],
+  testPathIgnorePatterns: ['/dist/', '/node_modules/'],
+  transform: {
+    '^.+\\.ts$': [
+      'ts-jest',
+      {
+        tsconfig: 'tsconfig.json',
+        useESM: true
+      }
+    ]
+  },
+  verbose: true
+}