text: const equalSubstring = require('./01')
  
  test('1', () => {
    expect(equalSubstring('abcd', 'bcdf', 3)).toBe(3)
  })
  
  test('2', () => {
    expect(equalSubstring('abcd', 'cdef', 3)).toBe(1)
  })
  
  test('3', () => {
    expect(equalSubstring('abcd', 'acde', 0)).toBe(1)
  })
  
  test('4', () => {
    expect(equalSubstring('krrgw', 'zjxss', 19)).toBe(2)
  })
  