For browser automation and writing integration tests in Elixir.
Can run multiple browser sessions simultaneously. See example.
Supports Selenium (Firefox, Chrome), ChromeDriver and PhantomJs.
Supports Javascript-heavy apps. Retries a few times before reporting error.
Implements the WebDriver Wire Protocol.
Internet Explorer may work under Selenium, but hasn't been tested.
defmodule HoundTest do
use ExUnit.Case
use Hound.Helpers
hound_session()
test "the truth", meta do
navigate_to("http://example.com/guestbook.html")
element = find_element(:name, "message")
fill_field(element, "Happy Birthday ~!")
submit_element(element)
assert page_title() == "Thank you"
end
end
Here's another simple browser-automation example.
Hound requires Elixir 1.0.4 or higher.
{:hound, "~> 1.0"}
test/test_helper.exs
file before the ExUnit.start()
line:Application.ensure_all_started(:hound)
ExUnit.start()
When you run mix test
, Hound is automatically started. You'll need a webdriver server running, like Selenium Server or Chrome Driver. If you aren't sure what it is, then read this.
Ensure the server is started when your tests are run. In config/test.exs
change the server
option of your endpoint config to true
:
config :hello_world_web, HelloWorldWeb.Endpoint,
http: [port: 4001],
server: true
To configure Hound, use your config/config.exs
file or equivalent.
Example:
config :hound, driver: "phantomjs"
Add the following lines to your ExUnit test files.
# Import helpers
use Hound.Helpers
# Start hound session and destroy when tests are run
hound_session()
If you prefer to manually start and end sessions, use Hound.start_session
and Hound.end_session
in the setup and teardown blocks of your tests.
The documentation pages include examples under each function.
The docs are at http://hexdocs.pm/hound.
Oh yeah ~! Here is an example.
If you are running PhantomJs, take a look at the Caveats section below.
Yes.
The number of tests you can run async at any point in time, depends on the number of sessions that your webdriver can maintain at a time. For Selenium Standalone, there seems to be a default limit of 15 sessions. You can set ExUnit's async option to limit the number of tests to run parallelly.
Yes. A separate session is started for each test process.
PhantomJs is extremely fast, but there are certain caveats. It uses Ghostdriver for its webdriver server, which currently has unimplemented features or open issues.
delete_cookies()
at the end of each test.You need a webdriver in order to run tests. We recommend phantomjs
but any can be used by setting the WEBDRIVER environment variable as shown below:
$ phantomjs --wd
$ WEBDRIVER=phantomjs mix test
Copyright © 2013-2015, Akash Manohar J, under the MIT License (basically, do whatever you want)