diff --git a/src/__tests__/unit/deco.test.tsx b/src/__tests__/unit/deco.test.tsx
new file mode 100644
index 00000000..6b87fea7
--- /dev/null
+++ b/src/__tests__/unit/deco.test.tsx
@@ -0,0 +1,49 @@
+import { describe, it, expect } from "vitest";
+
+function logAround(_target: any, key: string, descriptor: PropertyDescriptor) {
+  const originalMethod = descriptor.value;
+
+  descriptor.value = function (...args: any[]) {
+    console.log(`Before calling ${key}`);
+    const result = originalMethod.apply(this, args);
+    console.log(`After calling ${key}`);
+    return result;
+  };
+
+  return descriptor;
+}
+
+function addOne(_target: any, _key: string, descriptor: PropertyDescriptor) {
+  const originalMethod = descriptor.value;
+
+  descriptor.value = function (...args: any[]) {
+    const result = originalMethod.apply(this, args);
+    return result + 1;
+  };
+
+  return descriptor;
+}
+
+export class TestClass {
+  @logAround
+  hello() {
+    console.log("Hello, world!");
+  }
+
+  @addOne
+  add(a: number, b: number) {
+    return a + b;
+  }
+}
+
+describe("deco.test.tsx", () => {
+  // it("should pass", () => {
+  //   const testClass = new TestClass();
+  //   testClass.hello();
+  // });
+  it("should add one", () => {
+    const testClass = new TestClass();
+    const result = testClass.add(2, 3);
+    expect(result).toBe(6);
+  });
+});