Core htmx AJAX Tests

• handles beforeend properly with no initial content11ms ‣

  var i = 0
  this.server.respondWith('GET', '/test', function(xhr) {
    i++
    xhr.respond(200, {}, '' + i)
  })
  var div = make('<div hx-get="/test" hx-swap="beforeend"></div>')
  div.click()
  this.server.respond()
  div.innerText.should.equal('1')
  div.click()
  this.server.respond()
  div.innerText.should.equal('12')
  div.click()
  this.server.respond()
  div.innerText.should.equal('123')