Как написать behat-тесты для обработчика картинок

1. Обработка изображений
Автоматические тесты
Петр Трофимов, onliner.by
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2. Сервис обработки картинок
upload.api broker
worker workerworker
content server
ZeroMQ
Sharding (round-robin)
WebDAV
content server
content server
отправить
картинку
получить статус
обработки
Application servers
2/19

3. Не используя картинки
3/19

4. function it_should_crop_vertical_image_without_resize()
{
$this->beConstructedWith(
$this->whiteImageWithBlackRectangle(
new Box(100, 300),
new Point(0, 100),
new Box(100, 100)
)
);
$resizedImage = $this->resize(new Box(100, 100));
$resizedImage->shouldBeAnInstanceOf(Image::class);
$resizedImage->shouldHaveSize(new Box(100, 100));
$resizedImage->shouldBeTheSameImage(
$this->whiteImageWithBlackRectangle(
new Box(100, 100),
new Point(0, 0),
new Box(100, 100)
)
);
}
4/19

5. public function getMatchers()
{
return [
'haveSize' => function (Image $image, Box $size) {
return $image->getSize()->getWidth() == $size->getWidth()
&& $image->getSize()->getHeight() == $size->getHeight();
},
'beTheSameImage' => function (Image $image1, Image $image2) {
return $image1->getGmagick()->getImageSignature()
== $image2->getGmagick()->getImageSignature();
},
];
}
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6. Используя картинки
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7. 7/19

8. Feature: Image processing in gif format
As a system
I want to process images in 7 modes
To use these images on different web pages
Scenario Outline: Processing horizontal image.gif
Given I have image <original_image>
When image is processed using mode <mode>
Then I should get image "<result_image>"
Examples:
| original_image | mode | result_image |
| original_horizontal.gif | crop_center | crop_center/result_horizontal.gif |
| original_horizontal.gif | copy | copy/result_horizontal.gif |
| original_horizontal.gif | large | large/result_horizontal.gif |
| original_horizontal.gif | resize | resize/result_horizontal.gif |
| original_horizontal.gif | resize_by_bigger_size | resize_by_bigger_size/result_horizontal.gif |
| original_horizontal.gif | scale | scale/result_horizontal.gif |
| original_horizontal.gif | white_background | white_background/result_horizontal.gif |
8/19

9. /**
* @Given I have image :path
*/
public function iHaveImage($path)
{
$path = $this->getImagePath($path);
if (!file_exists($path)) {
throw new Exception(
"File $path not found"
);
}
$this->originalImagePath = $path;
}
/**
* @When image is processed using mode
:name
*/
public function
imageIsProcessedUsingMode($name)
{
$this->processImage([
'mode' => $name,
'w' => 300,
'h' => 300,
]);
}
/**
* @Then I should get image :path
*/
public function iShouldGetImage($path)
{
$expectedImagePath = $this->getImagePath($path);
if (!file_exists($expectedImagePath)) {
throw new Exception(
"File $expectedImagePath not found"
);
}
$expected = new Imagick($expectedImagePath);
$actual = new Imagick($this->actualImagePath);
if ($actual->getImageGeometry() != $expected-
>getImageGeometry()) {
throw new Exception(
'Image sizes do not match'
);
}
if ($actual->compareImages($expected, 1)[1] != 0) {
throw new Exception('Images do not match');
}
unlink($this->actualImagePath);
}
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10. 10/19

11. Визуальное сравнение
11/19

12. $image1 = new imagick("image1.png");
$image2 = new imagick("image2.png");
$result = $image1->compareImages(
$image2,
Imagick::METRIC_MEANSQUAREERROR
);
$result[0]->setImageFormat("png");
header("Content-Type: image/png");
echo $result[0];
12/19

13. 13/19

14. Поддержка анимированных GIF-ов
14/19

15. 15/19

16. $image = $image->appendImages(true);
16/19

17. Генерация изображений
17/19

18. default:
suites:
default:
contexts: [FeatureContext]
factory:
suites:
default:
contexts: [FactoryContext]
./vendor/bin/behat --profile factory
public function iShouldGetImage($path)
{
$path = $this->getImagePath($path);
echo sprintf(
'Generate image "%s"? [Y/n]',
$path
);
ob_flush();
$answer = strtolower(trim(fgets(STDIN)));
if ($answer && $answer != 'y') {
return;
}
$dir = pathinfo($path, PATHINFO_DIRNAME);
if (!is_dir($dir)) {
mkdir($dir, 0775, true);
}
copy($this->actualImagePath, $path);
}
18/19

19. http://www.phpspec.net/
http://docs.behat.org/en/v3.0/
http://php.net/manual/en/book.imagick.php
https://imagine.readthedocs.io/en/latest/
https://github.com/ptrofimov/zeroevents
Спасибо за внимание!
19/19