feat: init

twake/backend/node/test/unit/pick.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it } from "@jest/globals";
+import * as pickUtils from "../../src/utils/pick";
+
+describe("The pick utils", () => {
+  describe("The pick function", () => {
+    it("should return an object wich contains only the defined properties", () => {
+      class TestClass {
+        keep: string;
+        me: string;
+        skip: string;
+      }
+
+      const keysToKeep = ["keep", "me"] as const;
+      const object = { keep: "foo", me: "bar", skip: "baz" } as TestClass;
+      const result = pickUtils.pick(object, ...keysToKeep);
+
+      expect(result).toEqual({ keep: "foo", me: "bar" });
+      expect(result).not.toContain("skip");
+    });
+
+    it("should return an empty object when input is empty", () => {
+      class TestClass {
+        keep: string;
+        me: string;
+        skip: string;
+      }
+
+      const keysToKeep = [] as const;
+      const object = { keep: "foo", me: "bar", skip: "baz" } as TestClass;
+      const result = pickUtils.pick(object, ...keysToKeep);
+
+      expect(result).toEqual({});
+    });
+  });
+});