# TucoTuco
[](https://travis-ci.org/stuart/tuco_tuco)
Testing for Elixir web applications.
TucoTuco helps you test your web application by running a web browser
and simulating user interaction with your application.
With a DSL approximating that of Capybara's, it should be
easy for developers to write tests for a web application.
## Setup
In your mix.exs add the following to the test environment deps:
```{:tucotuco, github: "stuart/tuco_tuco"} ```
Either specify tuco_tuco in your application block in mix.exs or do:
``` :application.start TucoTuco ```
## Requirements
Testing requires that you have Phantomjs, Firefox or ChromeDriver installed.
You can also test against a remote WebDriver server such as a Selenium instance.
## Documentation
Here is a rough guide to using TucoTuco.
### Navigation
Visit sends the browser to other pages.
```elixir
visit "http://elixir-lang.org"
visit "/login"
```
Relative urls will be appended with the TucoTuco.app_root value.
You can go back and forward in the browser history:
```elixir
go_forward
go_back
```
And query the current url:
```elixir
current_url
current_path
current_query
current_port
```
### Clicking
You can click on a link or button with the ```click_link``` and
```click_button``` commands.
```elixir
click_link "Home"
click_link "i3"
click_button "Back"
click_button "Submit"
```
Yet to come: mouse movements.
### Forms
Interacting with forms is easy with TucoTuco's functions for that:
```elixir
fill_in "Login", "Stuart"
fill_in "Password", "secret_password"
click_button "Submit"
choose "A radio button"
select "Carrot"
select "Tomato", from: "Vegetables"
check "A Checkbox"
```
You can even attach files:
```elixir
attach_file "Upload Picture", "path/to/my_photo.png"
```
### Querying
Getting information about the page to use in assertions:
```elixir
Page.has_css? "table thead tr.header"
Page.has_xpath? "//foo/bar[@name='baz']"
Page.has_text? "Some text from the page"
Page.has_link? "Back"
```
With ```has_css?``` and ```has_xpath?``` you can specify a count
of how many should be found.
```elixir
# Check that there are 5 rows in the table.
Page.has_css? "table tbody tr", count: 5
```
There are many more. Check the documentation for them.
### Assertions
TucoTuco supplies two assertions that you can use directly in tests:
```elixir
assert_selector :xpath, "//foo/bar"
refute_selector :xpath, "//baz[@class='bob']"
```
### Finders
Finders return elements from the DOM.
```elixir
```
### Elements
The following functions for manipulating elements are imported from
WebDriver, they all take a WebDriver.Element struct as the
first argument. Luckily that is exactly what all the finders return:
```elixir
Element.attribute reference, :a_html_attribute
Element.clear reference
Element.click reference
Element.css reference, "some-css-property-name"
Element.displayed? reference
Element.enabled? reference
Element.equals? reference, other_reference
Element.location? reference
Element.location_in_view? reference
Element.name reference
Element.selected? reference
Element.size reference
Element.submit reference
Element.text reference
Element.value reference, "value to set"
```
For more detailed docs on the Element functions see
[WebDriver.Element](http://stuart.github.io/elixir-webdriver/WebDriver.Element.html).
### Javascript
Javascript can be run using the ```execute_javascript``` and ```execute_async_javascript```
commands.
```elixir
iex> execute_javascript "return argument[0] * 10", [3]
iex> 30
```
### Retrying
When you are testing applications that have Javascript modifying the page
it is possible that elements will not be available when you want them because
the browser script takes some time to run.
To alleviate this TucoTuco has retry settings. When retry is turned on all the
Page.has_foo? and action functions will retry for a set number of times before failing.
You can also use the retry function yourself like this:
```elixir
# Find elements
TucoTuco.Finder.find using, selector
# Any function
TucoTuco.Retry.retry fn -> my_function(args) end
```
Changing retry settings:
```elixir
# Set retries on
TucoTuco.use_retries true
# Set the maximum retry time in milliseconds.
TucoTuco.max_retry_time 1000
# Set the delay between retries in milliseconds.
TucoTuco.retry_delay 20
```
### Multiple Sessions
You can run multiple sessions on different browser or on the same browser.
To start a session use:
```
TucoTuco.start_session :browser_name, :session_name, browser_type
```
Where the browser type is one of :phantomjs, :firefox or :chrome.
If the process :browser_name is already running the session will be started on
that, otherwise a new browser will start running.
Once you have multiple sessions running you can swap sessions with:
```
TucoTuco.session :new_session
```
And to get a list of sessions that are running:
```
TucoTuco.sessions
```
### Screenshot
When the driver supports it, you can take a screenshot and
save it as a PNG file.
```
save_screenshot "path/to/file.png"
```
Example Session from console:
( some responses have been cut for brevity )
```elixir
iex(1)> use TucoTuco.DSL
:ok
iex(2)> TucoTuco.start_session :test_browser, :tuco_test, :phantomjs
{:ok,
TucoTuco.SessionPool.SessionPoolState[current_session: :tuco_test,
app_root: nil]}
iex(3)> visit "http://elixir-lang.org"
iex(4)> current_url
"http://elixir-lang.org/"
iex(5)> click_link "getting started guide"
iex(6)> current_url
"http://elixir-lang.org/getting_started/1.html"
iex(7)> Page.has_css? "article h1#toc_0"
true
iex(8)> Page.has_text? "Elixir also supports UTF-8 encoded strings:"
true
iex(9)> click_link "Next →"
iex(10)> current_url
"http://elixir-lang.org/getting_started/2.html"
iex(11)> Page.has_xpath? "//h1[.='2 Diving in']"
true
iex(15)> go_back
iex(16)> current_path
"/getting_started/1.html"
iex(17)>
```
###Changelog
2014-08-17
* 0.5.1
* Webdriver 0.5.2
* Use hex.pm for deps
2014-08-12
* 0.5.0
* Elixir-0.15.0
* Webdriver 0.5.0
2014-03-06
* 0.4.0
* Added save_screenshot
2014-03-04
* 0.3.0
* Added execute_javascript and execute_async_javascript
2014-03-02
* 0.2.1
* Element functions from WebDriver
* Retries
