set up jest

jest.config.cjs

@@ -0,0 +1,15 @@
+module.exports = {
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+    testMatch: ['**/tests/**/*.spec.ts'],
+    collectCoverageFrom: [
+        '<rootDir>/src/**/*.ts',
+        '!<rootDir>/src/types/**/*.ts'
+    ],
+    globals: {
+        'ts-jest': {
+            diagnostics: false,
+            isolatedModules: true
+        }
+    }
+};

jest.config.js

@@ -1,15 +0,0 @@
-module.exports = {
-  preset: 'ts-jest',
-  testEnvironment: 'node',
-  testMatch: ['**/tests/**/*.spec.ts'],
-  collectCoverageFrom: [
-    '<rootDir>/src/**/*.ts',
-    '!<rootDir>/src/types/**/*.ts',
-  ],
-  globals: {
-    'ts-jest': {
-      diagnostics: false,
-      isolatedModules: true,
-    },
-  },
-};