Add test suite, cover existing functions

vitest.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    environment: 'node', // Using node environment as we are testing logic not browser specifics
+    include: ['test/**/*.test.ts'],
+    deps: {
+      interopDefault: true,
+    },
+  },
+});