Polyglot Automation
@yashaka

Preface…
@yashaka

What Language?

Automation
=
Automating manual routine work

Automation
=>
QA
???

Effective Automation
=>
QA

Polyglot Automation
=
Using Any Language to make it Effective

Effective Automation
*=
with Backend Language
Web UI

Why?

Developers can help with implementation
Easier for devs to use and support tests
Smaller Tech Stack. No Zoo at project :)
And…

Allows to use fast & efficient test data pre-setup!

Demo

Full coverage for TodoMVC:
Without “backend” preconditions: 24s
With “backend” preconditions: 16s
=> optimised for 30%

A remark
TodoMVC is very simple app with small lightweight
“preconditions” in tests
Real app will usually have much more “hardweight”
preconditions
So the optimisation may be much bigger

But it’s hard,
no?

Hard to:
learn new language…
use statically typed Java/C# over dynamic Python/
Ruby…
?

No:p

No:p
if you use “easy tools” ;)

Examples

Tests

public class TodoMVCTest {
@Test
public void testFilterTasks(){
Tasks.visit();
Tasks.add("a", "b", "c");
Tasks.shouldBe("a", "b", "c");
Tasks.toggle("b");
Tasks.filterActive ();
Tasks.shouldBe("a", "c");
Tasks.filterCompleted ();
Tasks.shouldBe("b");
}
}

[TestFixture ()]
public class Test : BaseTest
{
[Test ()]
public void FilterTasks ()
{
Tasks.Visit ();
Tasks.Add ("a", "b", "c");
Tasks.ShouldBe ("a", "b", "c");
Tasks.Toggle ("b");
Tasks.FilterActive ();
Tasks.ShouldBe ("a", "c");
Tasks.FilterCompleted ();
Tasks.ShouldBe ("b");
}
}

class TestTodoMVC(BaseTest):
def test_filter_tasks(self):
tasks.visit()
tasks.add("a", "b", "c")
tasks.should_be("a", "b", "c")
tasks.toggle("b")
tasks.filter_active ()
tasks.should_be("a", "c")
tasks.filter_completed ()
tasks.should_be("b")

describe "todomvc" do
it "filters tasks" do
Tasks.open
Tasks.add "a", "b", "c"
Tasks.should_be "a", "b", "c"
Tasks.toggle "b"
Tasks.filter_active
Tasks.should_be "a", "c"
Tasks.filter_completed
Tasks.should_be "b"
end
end

Helpers
simpler

public class Tasks {
...
public static void visit() {
open("https://todomvc4tasj.herokuapp.com/");
}
public static void filterActive(){
$(By.linkText("Active")).click();
}
public static void filterCompleted(){
$(By.linkText("Completed")).click();
}
public static void add(String... taskTexts) {
for(String text: taskTexts){
$("#new-todo").setValue(text).pressEnter();
}
}
...
}

public static class Tasks
{
...
public static void Visit()
{
Open ("https://todomvc4tasj.herokuapp.com/");
}
public static void FilterActive ()
{
S (By.LinkText ("Active")).Click ();
}
public static void FilterCompleted ()
{
S (By.LinkText ("Completed")).Click ();
}
public static void Add(params string[] taskTexts)
{
foreach (var text in taskTexts)
{
S ("#new-todo").SetValue (text).PressEnter ();
}
}
...
}

…
def visit():
tools.visit("https://todomvc4tasj.herokuapp.com/")
def filter_active():
s(by_link_text(”Active”)).click()
def filter_completed():
s(by_link_text(”Completed”)).click()
def add(*task_texts):
for text in task_texts:
s("#new-todo").set_value(text).press_enter()

module Tasks
extend Capybara::DSL
def self.open
visit 'https://todomvc4tasj.herokuapp.com'
end
def self.filter_active
find("a", text:"Active").click
end
def self.filter_completed
find("a", text:"Completed").click
end
def self.add *task_texts
task_texts.each do |text|
find("#new-todo").send_keys(text, :enter)
end
end
...

Helpers
a bit harder

public class Tasks {
public static ElementsCollection tasks = $$("#todo-list>li");
...
public static void toggle(String taskText) {
tasks.findBy(exactText(taskText)).find(".toggle").click();
}
public static void shouldBe(String... taskTexts) {
tasks.filterBy(visible).shouldHave(exactTexts(taskTexts));
}
}

public static class Tasks
{
public static SCollection List = SS ("#todo-list>li");
...
public static void Toggle (string taskText)
{
List.FindBy (Have.ExactText(taskText)).Find (".toggle").Click();
}
public static void ShouldBe(params string[] names)
{
List.FilterBy (Be.Visible).Should (Have.Texts (names));
}
}

tasks = ss("#todo-list>li")
...
def toggle(task_text):
tasks.findBy(exact_text(task_text)).find(".toggle").click()
def should_be(*task_texts):
tasks.filterBy(visible).should_have(exact_texts(*task_texts))

module Tasks
extend Capybara::DSL
def self.tasks
all "#todo-list>li"
end
...
def self.toggle task_text
(tasks.findBy {|task| task.text == task_text}).find(".toggle").click
end
def self.should_be *task_texts
tasks.texts.should == task_texts
end
end

Easy?

Easy Tools?

Java: Selenide
Python: Selene is coming…
C#: NSelene is coming…
Ruby: Capybara
? JavaScript: Protractor
? PHP: Codeception

No ready Easy Tool for your
language?
Lack of knowledge?
=> ask project’s developers to write it for you
Brave?
=> implement it by your own

How to become polyglot
automation engineer?
Just learn ONE Language perfectly.
Then
Don’t be afraid to switch to other when it fits better

Learn next language
learnxinyminutes.com
+
koans
+
practice solving common tasks
+
google.com

Afterwords
There are good practices in context,
but there are no best practices.
(c) Cem Kaner, James Bach

Q&A

github.com/yashaka
youtube.com/c/ItlabsNetUa
gitter.im/yashaka/better-selenium
yashaka@gmail.com@yashaka

www.itlabs.net.ua
contact@itlabs.net
+38 (073) 467-61-12
Thank you!