Marat's Notes

Writing your first Elixir integration tests with Hound

Oct 29, 2017
1 minute read

Two or three weeks ago I deployed first version of erlangjobs.ru web site - Elixir/Erlang free job board.

Today we have team of three core developers, and one of them helped us with elixirjobs.ru domain. Many thanks!

So, we implemented beautiful slugs for job urls, new main page, twitter posts and many other code and feature improvements.

Few days go, I decided to implement integrations tests into our project.

Just setup Hound on your project:

def deps do
  [{:hound, "~> 1.0"}]
end

Add Hound to your test/test_helper.exs file before the ExUnit.start() line:

Application.ensure_all_started(:hound)
ExUnit.start()

Install and run webdriver server. I choosed chromedriver (macOS with homebrew):

brew install chromedriver

And one more thing. Add webdriver into your config:

config :hound, driver: "chrome_driver"

Last step - add the following lines to your ExUnit test files:

use Hound.Helpers
hound_session()

Write new test:

defmodule Erlangjobs.NewJobTest do
  use Erlangjobs.IntegrationCase

  def jobs_index do
    job_url(ErlangjobsWeb.Endpoint, :index)
  end

  @tag :integration
  test "GET /jobs/new and add invalid job" do

    jobs_index() |> navigate_to()

    click({:id, "add_job"})

    assert element_displayed?({:id, "add_job_form"})

    new_job_form = find_element(:id, "add_job_form")

    new_job_form
    |> find_within_element(:id, "job_title")
    |> fill_field("New Job")

    new_job_form
    |> find_within_element(:css, "button")
    |> click

    assert element_displayed?({:css, ".alert.alert-danger"})
  end
end

Run your tests as usual:

mix test