Feat/use testing framework

.github/workflows/unit.yml

@@ -8,7 +8,7 @@ jobs:
   test:
     strategy:
       matrix:
-        node-version: [12, 14, 16]
+        node-version: [12, 14, 16, 18]
         platform: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:

.gitignore

@@ -60,8 +60,7 @@ typings
 # next.js build output
 .next
 
-*.js
-*.js.map
-*.d.ts
 *.DS_Store
 *.lock
+
+dist/

jest.config.js

@@ -0,0 +1,5 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+export default {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+};

package.json

@@ -26,15 +26,18 @@
     "build": "tsc --project tsconfig.json",
     "dryrun": "npm publish --dry-run",
     "lint": "xo && echo 'No lint errors. All good!'",
-    "test": "node tests/test.js"
+    "test": "jest tests/test.ts"
   },
   "dependencies": {
     "type-fest": "^2.1.0",
     "typescript": "^4.4.2"
   },
   "devDependencies": {
+    "@types/jest": "^29.5.4",
     "@types/node": "^18.0.0",
+    "jest": "^29.6.4",
     "prettier": "^2.3.2",
+    "ts-jest": "^29.1.1",
     "xo": "^0.44.0"
   },
   "xo": {

src/index.ts

@@ -1,4 +1,4 @@
-import fs from 'fs';
+import fs from 'node:fs';
 import typescript from 'typescript';
 import type { PackageJson } from 'type-fest';
 import type {
@@ -167,7 +167,7 @@ const ts2gas = (source: string, transpileOptions: Readonly<TranspileOptions> = {
    * It use 'createCommentedStatement' to comment-out filtered node
    * @param {NodeFilter} nodeFilter The node visitor used to transform.
    */
-  const ignoreNodeBeforeBuilder: BeforeTransformerFactory = (nodeFilter) => (context) => {
+  const ignoreNodeBeforeBuilder: BeforeTransformerFactory = (nodeFilter: NodeFilter) => (context) => {
     const visitor: Visitor = (node) =>
       nodeFilter(node) ? createCommentedStatement(node) : visitEachChild(node, visitor, context);
 
@@ -179,7 +179,7 @@ const ts2gas = (source: string, transpileOptions: Readonly<TranspileOptions> = {
    * It use applies the 'NoSubstitution' flag on every node
    * @param {NodeFilter} nodeFilter The node visitor used to transform (unused here).
    */
-  const noSubstitutionBeforeBuilder: BeforeTransformerFactory = (nodeFilter) => (context) => {
+  const noSubstitutionBeforeBuilder: BeforeTransformerFactory = (nodeFilter: NodeFilter) => (context) => {
     const visitor: Visitor = (node) => {
       if (
         nodeFilter(node) && // Node kind is Identifier
@@ -202,7 +202,7 @@ const ts2gas = (source: string, transpileOptions: Readonly<TranspileOptions> = {
    * @param {SyntaxKind} kind the kind of node to filter.
    * @param {NodeFilter} nodeFilter The node visitor used to transform.
    */
-  const ignoreNodeAfterBuilder: AfterTransformerFactory = (kind, nodeFilter) => (context) => {
+  const ignoreNodeAfterBuilder: AfterTransformerFactory = (kind: SyntaxKind, nodeFilter: NodeFilter) => (context) => {
     const previousOnSubstituteNode = context.onSubstituteNode;
 
     context.enableSubstitution(kind);