feat: add mock proxy object

src/lib/test/index.ts

@@ -0,0 +1 @@
+export * from './mock'

src/lib/test/mock/index.ts

@@ -0,0 +1 @@
+export { mock } from './mock'

src/lib/test/mock/mock.ts

@@ -0,0 +1,17 @@
+export function mock<T>(): jest.MaybeMocked<T> & { mockClear(): void } {
+    const cache = new Map<any, jest.Mock>()
+    const handler: ProxyHandler<object> = {
+        get: (_, name) => {
+            if (name === 'mockClear') {
+                return () => cache.clear()
+            }
+
+            if (!cache.has(name)) {
+                cache.set(name, jest.fn().mockName(name.toString()))
+            }
+
+            return cache.get(name)
+        },
+    }
+    return new Proxy({}, handler) as jest.MaybeMocked<T> & { mockClear(): void }
+}