isObject.test.ts

import { isObject } from "../src";

const NON_OBJECTS = ["string", 10, NaN, true, null, undefined];

const OBJECTS = [{ plain: "object" }, new Object(), new Map()];

describe("isObject()", () => {
  it("returns false when a non-object is provided", () => {
    NON_OBJECTS.forEach(
      (nonObject: string | number | boolean | null | undefined) => {
        expect(isObject(nonObject)).toBe(false);
      }
    );
  });
  it("returns false when a File is provided", () => {
    const file = new File(["test"], "test.txt");
    expect(isObject(file)).toBe(false);
  });
  it("returns false when a Date is provided", () => {
    const date = new Date();
    expect(isObject(date)).toBe(false);
  });
  it("returns false when an array is provided", () => {
    expect(isObject(["foo"])).toBe(false);
  });
  it("returns true when an object is provided", () => {
    OBJECTS.forEach((object: any) => {
      expect(isObject(object)).toBe(true);
    });
  });
});