cannot log-in user using rspec integration testing - selenium

Question

I am trying to create a test for Login; The functionality has been implemented and working fine but I am trying to create a test for it. However, User model is empty in sessions controller but it has content in the test code. On the code below, I added binding.pry(debugger) to check for the User model.
It's working fine too when I am not using webdriver(js: true), if it's just purely like this:
post "/api/user/sign_in", {
user: {
email: user.email,
password: user.password
}
}
expect(response).to be_success
I've been using the same test code before which is working fine. I am not just sure if it has something to do with my front-end is AngularJS.
TEST CODE
require 'rails_helper'
describe Model, js: true do
let(:model) { Model }
let!(:user) { create(:user) }
it "Login" do
binding.pry ### #user exists in User.all #####
visit root_path
find('#btn-signin').click
find('#tab-signin').click
fill_in 'user_email', with: user.email
fill_in 'user_password', with: user.password
find('#btn-login').click
binding.pry #### user exists in User.all ####
expect(page).to have_css '.profile-pic'
end
end
SESSIONS CONTROLLER
def create
puts User.pluck(:email).join(', ') #### user does not exists (it's actually blank) ####
warden.authenticate!(:scope => resource_name, :recall => "#{controller_path}#failure")
render :json => current_user.to_json
end
GEMS
group :development, :test do
gem 'factory_girl_rails'
gem 'pry'
gem 'quiet_assets'
gem 'rspec-rails', '~> 3.0.0'
end
group :test do
gem 'codeclimate-test-reporter', require: nil
gem 'shoulda-matchers'
gem 'jasmine'
gem 'capybara'
gem 'selenium-webdriver', '~> 2.38.0'
end
RAILS SPEC
ENV["RAILS_ENV"] ||= 'test'
require 'spec_helper'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'capybara/rspec'
Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }
ActiveRecord::Migration.maintain_test_schema!
RSpec.configure do |config|
config.include Capybara::DSL
config.include FactoryGirl::Syntax::Methods
config.use_transactional_fixtures = true
config.include UserMacros
config.infer_spec_type_from_file_location!
end

Answer 1

SOLUTION:
GEMFILE
gem 'database_cleaner'
RAILS_HELPER.RB
config.use_transactional_fixtures = false
config.before(:suite) do
DatabaseCleaner.strategy = :truncation
end
config.before(:each) do
DatabaseCleaner.start
end
config.after(:each) do
DatabaseCleaner.clean
end