added testing dependencies and sample test

Author: i-am-that-guy

bun.lock

@@ -0,0 +1,9 @@
+import { createDefaultPreset } from "ts-jest";
+
+const tsJestTransformCfg = createDefaultPreset().transform;
+
+/** @type {import("jest").Config} **/
+export const testEnvironment = "node";
+export const transform = {
+  ...tsJestTransformCfg,
+};