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Jefferson Gonçalves
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Phpunit Architecture Test

#PHPUnit Application Architecture Test

Idea: write architecture tests as well as feature and unit tests. Protect your architecture code style!

#Example

Don't use repositories in controllers use only in services classes. Take three layers "repositories", "services", "controllers" and add asserts on dependencies.

$controllers  = $this->layer()->leaveByNameStart('App\\Controllers');
$services     = $this->layer()->leaveByNameStart('App\\Services');
$repositories = $this->layer()->leaveByNameStart('App\\Repositories');

$this->assertDoesNotDependOn($controllers, $repositories);
$this->assertDependOn($controllers, $services);
$this->assertDependOn($services, $repositories);

#Installation

#Install via composer

composer require --dev ta-tikoma/phpunit-architecture-test

#Add trait to Test class

abstract class TestCase extends BaseTestCase
{
    use ArchitectureAsserts;
}

#Use

  • Create test
  • Make layers of application
  • Add asserts
    public function test_make_layer_from_namespace()
    {
        $app = $this->layer()->leaveByNameStart('PHPUnit\\Architecture');
        $tests = $this->layer()->leaveByNameStart('tests');

        $this->assertDoesNotDependOn($app, $tests);
        $this->assertDependOn($tests, $app);
    }

#Run

./vendor/bin/phpunit

#Test files structure

  • tests
    • Architecture
      • SomeTest.php
    • Feature
    • Unit

#How to build Layer

  • $this->layer() take access to layer with all objects and filter for create your layer:
    • leave objects in layer only:
      • ->leave($closure) by closure
      • ->leaveByPathStart($path) by object path start
      • ->leaveByNameStart($name) by object name start
      • ->leaveByNameRegex($name) by object name regex
      • ->leaveByType($name) by object type
    • remove objects from layer:
      • ->exclude($closure) by closure
      • ->excludeByPathStart($path) by object path start
      • ->excludeByNameStart($name) by object name start
      • ->excludeByNameRegex($name) by object name regex
      • ->excludeByType($name) by object type
  • you can create multiple layers with split:
    • ->split($closure) by closure
    • ->splitByNameRegex($closure) by object name

#Asserts

#Dependencies

Example: Controllers don't use Repositories only via Services

  • assertDependOn($A, $B) Layer A must contains dependencies by layer B.
  • assertDoesNotDependOn($A, $B) Layer A (or layers in array A) must not contains dependencies by layer B (or layers in array B).

#Methods

  • assertIncomingsFrom($A, $B) Layer A must contains arguments with types from Layer B
  • assertIncomingsNotFrom($A, $B) Layer A must not contains arguments with types from Layer B
  • assertOutgoingFrom($A, $B) Layer A must contains methods return types from Layer B
  • assertOutgoingNotFrom($A, $B) Layer A must not contains methods return types from Layer B
  • assertMethodSizeLessThan($A, $SIZE) Layer A must not contains methods with size less than SIZE

#Properties

  • assertHasNotPublicProperties($A) Objects in Layer A must not contains public properties

#Essence

You can use $layer->essence($path) method for collect data from layer. For example get visibility of all properties in layer: $visibilities = $layer->essence('properties.*.visibility'); .

  • assertEach($list, $check, $message) - each item of list must passed tested by $check-function
  • assertNotOne($list, $check, $message) - not one item of list must not passed tested by $check-function
  • assertAny($list, $check, $message) - one or more item of list must not passed tested by $check-function

#Alternatives

#Advantages

  • Dynamic creation of layers by regular expression (not need declare each module)
  • Run along with the rest of tests from phpunit
  • Asserts to method arguments and return types (for check dependent injection)
  • Asserts to properties visibility

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