Unit testing for project managers

1© 2017 Rogue Wave Software, Inc. All Rights Reserved.
Unit testing for
project managers
Cal Evans

Presenter
Cal Evans
Technical Manager, Training and Certification
Rogue Wave Software
cal.evans@roguewave.com

Agenda
1. Exactly what is Unit Testing?
2. Why should my teams bother writing them?
3. Ok, I get it, but now when should my teams
start writing unit test?
4. You’ve left out the most important part, how do
my teams go about writing Unit Tests?
5. Q&A

Poll #1
How many developers do you have at your
company?

What

Unit testing is a software developmentUnit testing is a software development process in
which the smallest testable parts of an
application, called units, are individually and
independently scrutinized for proper operation.
What

What
public function testCreateMessage()
{
$account = new Account($this->db,1);
$message = new Message($this->db,null,$account);
$message->text ="This is a test message.";
$message->save();
$this->assertEquals($message->id,1);
$this->assertEquals($message->text ,"This is a test message.");
$this->assertEquals($message->front_end_account_link_id,1);
return;
}

What

What
The question you are faced with is not WHY,
the question you are faced with is:
“What will my projects look like
when I adopt unit testing as a best
practice?”

What
Development
Working unit
tests
Organized
chaos
The beginnings
of
understanding
Chaos

What
The Payoff
Development
Change
request
Change
complete

What
Mockery

Poll #2
Do you currently do unit testing at your company?

Why

Why
Automated tests help you
get things right the first time,
costing less.

Why
There’s never time to do it
right, there’s always
time to do it over.

Why
GO $
$$$$
$$$
$$$$
$$
$

Why
public function respond(ResponseInterface $response)
{
if (!headers_sent()) {
header(sprintf(
'HTTP/%s %s %s',
$response->getProtocolVersion(),
$response->getStatusCode(),
$response->getReasonPhrase()
));
}
if (!$this->isEmptyResponse($response)) {
$body = $response->getBody();
if ($body->isSeekable()) {
$body->rewind();
}
$settings = $this->container->get('settings');
$chunkSize = $settings['responseChunkSize'];
$contentLength = $response->getHeaderLine('Content-Length');
if (!$contentLength) {
$contentLength = $body->getSize();
}
if (isset($contentLength)) {
$amountToRead = $contentLength;
while ($amountToRead > 0 && !$body->eof()) {
$data = $body->read(min($chunkSize, $amountToRead));
echo $data;
$amountToRead -= strlen($data);
if (connection_status() != CONNECTION_NORMAL) {
break;
}
}
} else {
while (!$body->eof()) {
echo $body->read($chunkSize);
if (connection_status() != CONNECTION_NORMAL) {
break;
}
}
}
}
}
=

Why
If your current project management style does
not allow for time to create unit tests, change
your style.

Why
7 reasons why
writing unit
tests
is important to
managers
(From Tim King)
Unit tests prove that your code actually works
You can improve the design without breaking it
They demonstrate concrete progress
Test-first forces you to plan before you code
Test-first reduces the cost of bugs
Unit tests make better designs
It’s faster than writing code without tests

Why
That’s a LOT
of reasons

When

When
“The best time to plant a
tree was 20 years ago.
The second best time is
now.”
– Chinese proverb

How

How
• Train your developers
• Pick a project to begin with
• Think it through
• Write your tests
• Write your code
It all starts with
training.

How
PHP Unit Testing JumpStart
• What is test driven development?
• Modularizing code
• Assertions
• Doubles and dummies
• Mocking and stubs
• Data providers
• Code Katas

Start
testing
today!
zend.com/unittest
for more
information

Q&A

Follow up
Twelve Benefits of Writing Unit Tests First (Tim King)
– sd.jtimothyking.com/2006/07/11/twelve-benefits-of-writing-unit-tests-first/
I Pity The Fool Who Doesn’t Write Unit Tests (Coding Horror)
– blog.codinghorror.com/i-pity-the-fool-who-doesnt-write-unit-tests/
Top 12 Reasons to Write Unit Tests (O’Reilly on Java)
– onjava.com/pub/a/onjava/2003/04/02/javaxpckbk.html
10 Best Automated Testing Frameworks for PHP (HONGKIAT)
– hongkiat.com/blog/automated-php-test/

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