@v4fire/core/lib/core/prelude/object/metrics/spec.js

V4Fire core library

"use strict";

describe('core/prelude/object/metrics/size', () => {
  it('array', () => {
    expect(Object.size([1, 2, 3])).toBe(3);
  });
  it('object', () => {
    expect(Object.size({
      a: 1
    })).toBe(1);
  });
  it('map', () => {
    expect(Object.size(new Map([[0, 1]]))).toBe(1);
  });
  it('set', () => {
    expect(Object.size(new Set([1, 2]))).toBe(2);
  });
  it('function', () => {
    expect(Object.size(foo)).toBe(2);
    function foo(a, b) {
      return a + b;
    }
  });
  it('string', () => {
    expect(Object.size('123')).toBe(3);
  });
  it('number', () => {
    expect(Object.size(2)).toBe(2);
    expect(Object.size(NaN)).toBe(0);
    expect(Object.size(Infinity)).toBe(Infinity);
  });
  it('iterable', () => {
    expect(Object.size([1, 2].values())).toBe(2);
  });
  it('null', () => {
    expect(Object.size(null)).toBe(0);
    expect(Object.size(undefined)).toBe(0);
  });
});
describe('core/prelude/object/metrics/isEmpty', () => {
  it('is empty', () => {
    expect(Object.isEmpty([])).toBe(true);
    expect(Object.isEmpty({})).toBe(true);
    expect(Object.isEmpty(null)).toBe(true);
  });
  it('is not empty', () => {
    expect(Object.isEmpty([1])).toBe(false);
    expect(Object.isEmpty(new Set([1, 2]))).toBe(false);
    expect(Object.isEmpty(1)).toBe(false);
  });
});