ci: add tests for parseInputArray.

Makes tools into a function to be able to mock it.
It does not need to be exported.

.github/workflows/test.yml

@@ -16,6 +16,17 @@ jobs:
       - run: npm ci
       - run: npm run build
 
+  test:
+    name: Test
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          cache: npm
+      - run: npm ci
+      - run: npm run test
+
   lint:
     name: Lint
     runs-on: ubuntu-20.04

.husky/pre-commit

@@ -1,2 +1,3 @@
+npm run test
 npm run build
 git add lib

jest.config.js

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