text: const isString = require('./isString')
  
  it('should return true if the value provided is a string literal', () => {
    const input = 'hello world'
    const expectation = true
    const result = isString(input)
  
    expect(result).toBe(expectation)
  })
  
  it('should return true if the value provided is a string object', () => {
    const input = new String('hello world')
    const expectation = true
    const result = isString(input)
  
    expect(result).toBe(expectation)
  })
  