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import { describe, expect, it } from "vitest";
import { exclude } from "../object";
describe("exclude", () => {
type TestObject = {
id: number;
name: string;
age: number;
email: string;
};
it("excludes specified keys from the object", () => {
const object: TestObject = {
id: 1,
name: "Alice",
age: 30,
email: "alice@example.com",
};
const result = exclude(object, ["age", "email"]);
expect(result).toEqual({ id: 1, name: "Alice" });
expect(result).not.toHaveProperty("age");
expect(result).not.toHaveProperty("email");
});
it("returns the same object if no keys are specified", () => {
const object: TestObject = {
id: 1,
name: "Alice",
age: 30,
email: "alice@example.com",
};
const keysToExclude: (keyof TestObject)[] = [];
const result = exclude(object, keysToExclude);
expect(result).toEqual(object);
});
it("does not modify the original object", () => {
const object: TestObject = {
id: 1,
name: "Alice",
age: 30,
email: "alice@example.com",
};
exclude(object, ["age", "email"]);
expect(object).toHaveProperty("age");
expect(object).toHaveProperty("email");
});
it("handles cases where keys to exclude are not present in the object", () => {
const object: TestObject = {
id: 1,
name: "Alice",
age: 30,
email: "alice@example.com",
};
const keysToExclude = ["nonExistentKey" as keyof TestObject];
const result = exclude(object, keysToExclude);
expect(result).toEqual(object);
});
it("returns the input if it is not an object", () => {
const object: unknown = null;
const keysToExclude = ["id"];
// @ts-expect-error passing invalid input type for tests
const result = exclude(object, keysToExclude);
expect(result).toBeNull();
});
});
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