InjectableTest.php

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<?php
namespace Magento\Test\Integrity\Library;

use Magento\TestFramework\Integrity\Library\Injectable;

class InjectableTest extends \PHPUnit\Framework\TestCase
{
    protected $injectable;

    protected $fileReflection;

    protected $parameterReflection;

    protected $declaredClass;

    public function setUp()
    {
        $this->injectable = new Injectable();
        $this->fileReflection = $this->getMockBuilder(
            \Zend\Code\Reflection\FileReflection::class
        )->disableOriginalConstructor()->getMock();

        $classReflection = $this->getMockBuilder(
            \Zend\Code\Reflection\ClassReflection::class
        )->disableOriginalConstructor()->getMock();

        $methodReflection = $this->getMockBuilder(
            \Zend\Code\Reflection\MethodReflection::class
        )->disableOriginalConstructor()->getMock();

        $this->parameterReflection = $this->getMockBuilder(
            \Zend\Code\Reflection\ParameterReflection::class
        )->disableOriginalConstructor()->getMock();

        $this->declaredClass = $this->getMockBuilder(
            \Zend\Code\Reflection\ClassReflection::class
        )->disableOriginalConstructor()->getMock();

        $methodReflection->expects(
            $this->once()
        )->method(
            'getDeclaringClass'
        )->will(
            $this->returnValue($this->declaredClass)
        );

        $methodReflection->expects(
            $this->any()
        )->method(
            'getParameters'
        )->will(
            $this->returnValue([$this->parameterReflection])
        );

        $classReflection->expects(
            $this->once()
        )->method(
            'getMethods'
        )->will(
            $this->returnValue([$methodReflection])
        );

        $this->fileReflection->expects(
            $this->once()
        )->method(
            'getClasses'
        )->will(
            $this->returnValue([$classReflection])
        );
    }

    public function testGetDependencies()
    {
        $classReflection = $this->getMockBuilder(
            \Zend\Code\Reflection\ClassReflection::class
        )->disableOriginalConstructor()->getMock();

        $classReflection->expects(
            $this->once()
        )->method(
            'getName'
        )->will(
            $this->returnValue(\Magento\Core\Model\Object::class)
        );

        $this->parameterReflection->expects(
            $this->once()
        )->method(
            'getClass'
        )->will(
            $this->returnValue($classReflection)
        );

        $this->assertEquals(
            [\Magento\Core\Model\Object::class],
            $this->injectable->getDependencies($this->fileReflection)
        );
    }

    public function testGetDependenciesWithException()
    {
        $this->parameterReflection->expects($this->once())->method('getClass')->will(
            $this->returnCallback(
                function () {
                    throw new \ReflectionException('Class Magento\Core\Model\Object does not exist');
                }
            )
        );

        $this->assertEquals(
            [\Magento\Core\Model\Object::class],
            $this->injectable->getDependencies($this->fileReflection)
        );
    }

    public function testGetDependenciesWithOtherException()
    {
        $this->parameterReflection->expects($this->once())->method('getClass')->will(
            $this->returnCallback(
                function () {
                    throw new \ReflectionException('Some message');
                }
            )
        );

        $this->injectable->getDependencies($this->fileReflection);
    }

    public function testGetDependenciesWhenMethodDeclaredInParentClass()
    {
        $this->declaredClass->expects($this->once())->method('getName')->will($this->returnValue('ParentClass'));

        $this->injectable->getDependencies($this->fileReflection);
    }
}