querystring.test.ts

import { describe, expect, it } from 'vitest';

import { camelToSnake } from '../../../underscore';

import { getQueryParams, stringifyQueryParams } from '../querystring';

describe('getQueryParams(string)', () => {
  it('parses an emtpy querystring', () => {
    const res = getQueryParams('');
    expect(res).toEqual({});
  });

  it('parses a querystring into a URLSearchParams instance', () => {
    const res = getQueryParams('foo=42&bar=43');
    expect(res).toEqual({ foo: '42', bar: '43' });
  });

  it('parses a querystring into a URLSearchParams instance even when prefixed with ?', () => {
    const res = getQueryParams('?foo=42&bar=43');
    expect(res).toEqual({ foo: '42', bar: '43' });
  });

  it('parses multiple occurances of the same key as an array', () => {
    const res = getQueryParams('?foo=42&foo=43&bar=1');
    expect(res).toEqual({ foo: ['42', '43'], bar: '1' });
  });
});

describe('stringifyQueryParams(object)', () => {
  it('handles null values', () => {
    expect(stringifyQueryParams(null)).toBe('');
  });

  it('handles undefined values', () => {
    expect(stringifyQueryParams(undefined)).toBe('');
  });

  it('handles string values', () => {
    expect(stringifyQueryParams('hello')).toBe('');
  });

  it('handles empty string values', () => {
    expect(stringifyQueryParams('')).toBe('');
  });

  it('converts an object to querystring', () => {
    expect(stringifyQueryParams({ foo: '42', bar: '43' })).toBe('foo=42&bar=43');
  });

  it('converts an object to querystring when value is an array', () => {
    expect(stringifyQueryParams({ foo: ['42', '22'], bar: '43' })).toBe('foo=42&foo=22&bar=43');
  });

  it('converts an object to querystring when value is undefined', () => {
    expect(stringifyQueryParams({ foo: ['42', '22'], bar: undefined })).toBe('foo=42&foo=22');
  });

  it('converts an object to querystring when value is null', () => {
    expect(stringifyQueryParams({ foo: null })).toBe('foo=');
  });

  it('converts an object to querystring when value is an object', () => {
    expect(stringifyQueryParams({ unsafe_metadata: { bar: '1' } })).toBe('unsafe_metadata=%7B%22bar%22%3A%221%22%7D');
  });

  it('converts an object to querystring when value contains invalid url symbols', () => {
    expect(stringifyQueryParams({ test: 'ena=duo' })).toBe('test=ena%3Dduo');
  });

  it('handles false value', () => {
    expect(stringifyQueryParams({ test: false, boo: true })).toBe('test=false&boo=true');
  });

  it('converts an object to querystring when key is camelCase', () => {
    expect(stringifyQueryParams({ barFoo: '1' }, { keyEncoder: camelToSnake })).toBe('bar_foo=1');
    expect(stringifyQueryParams({ unsafeMetadata: { bar: '1' } }, { keyEncoder: camelToSnake })).toBe(
      'unsafe_metadata=%7B%22bar%22%3A%221%22%7D',
    );
  });
});
//test=ena%3Dduo