Тестовые дубликаты

<?php declare(strict_types=1);
class SomeClass
{
    public function doSomething()
    {
        // Do something.
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StubTest extends TestCase
{
    public function testStub(): void
    {
        // Create a stub for the SomeClass class.
        $stub = $this->createStub(SomeClass::class);

        // Configure the stub.
        $stub->method('doSomething')
             ->willReturn('foo');

        // Calling $stub->doSomething() will now return
        // 'foo'.
        $this->assertSame('foo', $stub->doSomething());
    }
}

<?php declare(strict_types=1);
class C
{
    public function m(): D
    {
        // Do something.
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StubTest extends TestCase
{
    public function testStub(): void
    {
        // Create a stub for the SomeClass class.
        $stub = $this->getMockBuilder(SomeClass::class)
                     ->disableOriginalConstructor()
                     ->disableOriginalClone()
                     ->disableArgumentCloning()
                     ->disallowMockingUnknownTypes()
                     ->getMock();

        // Configure the stub.
        $stub->method('doSomething')
             ->willReturn('foo');

        // Calling $stub->doSomething() will now return
        // 'foo'.
        $this->assertSame('foo', $stub->doSomething());
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StubTest extends TestCase
{
    public function testReturnArgumentStub(): void
    {
        // Create a stub for the SomeClass class.
        $stub = $this->createStub(SomeClass::class);

        // Configure the stub.
        $stub->method('doSomething')
             ->will($this->returnArgument(0));

        // $stub->doSomething('foo') returns 'foo'
        $this->assertSame('foo', $stub->doSomething('foo'));

        // $stub->doSomething('bar') returns 'bar'
        $this->assertSame('bar', $stub->doSomething('bar'));
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StubTest extends TestCase
{
    public function testReturnSelf(): void
    {
        // Create a stub for the SomeClass class.
        $stub = $this->createStub(SomeClass::class);

        // Configure the stub.
        $stub->method('doSomething')
             ->will($this->returnSelf());

        // $stub->doSomething() returns $stub
        $this->assertSame($stub, $stub->doSomething());
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StubTest extends TestCase
{
    public function testReturnValueMapStub(): void
    {
        // Create a stub for the SomeClass class.
        $stub = $this->createStub(SomeClass::class);

        // Create a map of arguments to return values.
        $map = [
            ['a', 'b', 'c', 'd'],
            ['e', 'f', 'g', 'h']
        ];

        // Configure the stub.
        $stub->method('doSomething')
             ->will($this->returnValueMap($map));

        // $stub->doSomething() returns different values depending on
        // the provided arguments.
        $this->assertSame('d', $stub->doSomething('a', 'b', 'c'));
        $this->assertSame('h', $stub->doSomething('e', 'f', 'g'));
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StubTest extends TestCase
{
    public function testReturnCallbackStub(): void
    {
        // Create a stub for the SomeClass class.
        $stub = $this->createStub(SomeClass::class);

        // Configure the stub.
        $stub->method('doSomething')
             ->will($this->returnCallback('str_rot13'));

        // $stub->doSomething($argument) returns str_rot13($argument)
        $this->assertSame('fbzrguvat', $stub->doSomething('something'));
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StubTest extends TestCase
{
    public function testOnConsecutiveCallsStub(): void
    {
        // Create a stub for the SomeClass class.
        $stub = $this->createStub(SomeClass::class);

        // Configure the stub.
        $stub->method('doSomething')
             ->will($this->onConsecutiveCalls(2, 3, 5, 7));

        // $stub->doSomething() returns a different value each time
        $this->assertSame(2, $stub->doSomething());
        $this->assertSame(3, $stub->doSomething());
        $this->assertSame(5, $stub->doSomething());
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class StubTest extends TestCase
{
    public function testThrowExceptionStub(): void
    {
        // Create a stub for the SomeClass class.
        $stub = $this->createStub(SomeClass::class);

        // Configure the stub.
        $stub->method('doSomething')
             ->will($this->throwException(new Exception));

        // $stub->doSomething() throws Exception
        $stub->doSomething();
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

class Subject
{
    protected $observers = [];
    protected $name;

    public function __construct($name)
    {
        $this->name = $name;
    }

    public function getName()
    {
        return $this->name;
    }

    public function attach(Observer $observer)
    {
        $this->observers[] = $observer;
    }

    public function doSomething()
    {
        // Do something.
        // ...

        // Notify observers that we did something.
        $this->notify('something');
    }

    public function doSomethingBad()
    {
        foreach ($this->observers as $observer) {
            $observer->reportError(42, 'Something bad happened', $this);
        }
    }

    protected function notify($argument)
    {
        foreach ($this->observers as $observer) {
            $observer->update($argument);
        }
    }

    // Other methods.
}

class Observer
{
    public function update($argument)
    {
        // Do something.
    }

    public function reportError($errorCode, $errorMessage, Subject $subject)
    {
        // Do something
    }

    // Other methods.
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class SubjectTest extends TestCase
{
    public function testObserversAreUpdated(): void
    {
        // Create a mock for the Observer class,
        // only mock the update() method.
        $observer = $this->createMock(Observer::class);

        // Set up the expectation for the update() method
        // to be called only once and with the string 'something'
        // as its parameter.
        $observer->expects($this->once())
                 ->method('update')
                 ->with($this->equalTo('something'));

        // Create a Subject object and attach the mocked
        // Observer object to it.
        $subject = new Subject('My subject');
        $subject->attach($observer);

        // Call the doSomething() method on the $subject object
        // which we expect to call the mocked Observer object's
        // update() method with the string 'something'.
        $subject->doSomething();
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class SubjectTest extends TestCase
{
    public function testErrorReported(): void
    {
        // Create a mock for the Observer class, mocking the
        // reportError() method
        $observer = $this->createMock(Observer::class);

        $observer->expects($this->once())
                 ->method('reportError')
                 ->with(
                       $this->greaterThan(0),
                       $this->stringContains('Something'),
                       $this->anything()
                   );

        $subject = new Subject('My subject');
        $subject->attach($observer);

        // The doSomethingBad() method should report an error to the observer
        // via the reportError() method
        $subject->doSomethingBad();
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class FooTest extends TestCase
{
    public function testFunctionCalledTwoTimesWithSpecificArguments(): void
    {
        $mock = $this->getMockBuilder(stdClass::class)
                     ->setMethods(['set'])
                     ->getMock();

        $mock->expects($this->exactly(2))
             ->method('set')
             ->withConsecutive(
                 [$this->equalTo('foo'), $this->greaterThan(0)],
                 [$this->equalTo('bar'), $this->greaterThan(0)]
             );

        $mock->set('foo', 21);
        $mock->set('bar', 48);
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class SubjectTest extends TestCase
{
    public function testErrorReported(): void
    {
        // Create a mock for the Observer class, mocking the
        // reportError() method
        $observer = $this->createMock(Observer::class);

        $observer->expects($this->once())
                 ->method('reportError')
                 ->with(
                     $this->greaterThan(0),
                     $this->stringContains('Something'),
                     $this->callback(function($subject)
                     {
                         return is_callable([$subject, 'getName']) &&
                                $subject->getName() == 'My subject';
                     }
                 ));

        $subject = new Subject('My subject');
        $subject->attach($observer);

        // The doSomethingBad() method should report an error to the observer
        // via the reportError() method
        $subject->doSomethingBad();
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class FooTest extends TestCase
{
    public function testIdenticalObjectPassed(): void
    {
        $expectedObject = new stdClass;

        $mock = $this->getMockBuilder(stdClass::class)
                     ->setMethods(['foo'])
                     ->getMock();

        $mock->expects($this->once())
             ->method('foo')
             ->with($this->identicalTo($expectedObject));

        $mock->foo($expectedObject);
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class FooTest extends TestCase
{
    public function testIdenticalObjectPassed(): void
    {
        $cloneArguments = true;

        $mock = $this->getMockBuilder(stdClass::class)
                     ->enableArgumentCloning()
                     ->getMock();

        // now your mock clones parameters so the identicalTo constraint
        // will fail.
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class SubjectTest extends TestCase
{
    public function testObserversAreUpdated(): void
    {
        $subject = new Subject('My subject');

        // Create a prophecy for the Observer class.
        $observer = $this->prophesize(Observer::class);

        // Set up the expectation for the update() method
        // to be called only once and with the string 'something'
        // as its parameter.
        $observer->update('something')->shouldBeCalled();

        // Reveal the prophecy and attach the mock object
        // to the Subject.
        $subject->attach($observer->reveal());

        // Call the doSomething() method on the $subject object
        // which we expect to call the mocked Observer object's
        // update() method with the string 'something'.
        $subject->doSomething();
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

trait AbstractTrait
{
    public function concreteMethod()
    {
        return $this->abstractMethod();
    }

    public abstract function abstractMethod();
}

final class TraitClassTest extends TestCase
{
    public function testConcreteMethod(): void
    {
        $mock = $this->getMockForTrait(AbstractTrait::class);

        $mock->expects($this->any())
             ->method('abstractMethod')
             ->will($this->returnValue(true));

        $this->assertTrue($mock->concreteMethod());
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

abstract class AbstractClass
{
    public function concreteMethod()
    {
        return $this->abstractMethod();
    }

    public abstract function abstractMethod();
}

final class AbstractClassTest extends TestCase
{
    public function testConcreteMethod(): void
    {
        $stub = $this->getMockForAbstractClass(AbstractClass::class);

        $stub->expects($this->any())
             ->method('abstractMethod')
             ->will($this->returnValue(true));

        $this->assertTrue($stub->concreteMethod());
    }
}

<?php declare(strict_types=1);
use PHPUnit\Framework\TestCase;

final class GoogleTest extends TestCase
{
    public function testSearch(): void
    {
        $googleSearch = $this->getMockFromWsdl(
          'GoogleSearch.wsdl', 'GoogleSearch'
        );

        $directoryCategory = new stdClass;
        $directoryCategory->fullViewableName = '';
        $directoryCategory->specialEncoding = '';

        $element = new stdClass;
        $element->summary = '';
        $element->URL = 'https://phpunit.de/';
        $element->snippet = '...';
        $element->title = '<b>PHPUnit</b>';
        $element->cachedSize = '11k';
        $element->relatedInformationPresent = true;
        $element->hostName = 'phpunit.de';
        $element->directoryCategory = $directoryCategory;
        $element->directoryTitle = '';

        $result = new stdClass;
        $result->documentFiltering = false;
        $result->searchComments = '';
        $result->estimatedTotalResultsCount = 3.9000;
        $result->estimateIsExact = false;
        $result->resultElements = [$element];
        $result->searchQuery = 'PHPUnit';
        $result->startIndex = 1;
        $result->endIndex = 1;
        $result->searchTips = '';
        $result->directoryCategories = [];
        $result->searchTime = 0.248822;

        $googleSearch->expects($this->any())
                     ->method('doGoogleSearch')
                     ->will($this->returnValue($result));

        /**
         * $googleSearch->doGoogleSearch() will now return a stubbed result and
         * the web service's doGoogleSearch() method will not be invoked.
         */
        $this->assertEquals(
          $result,
          $googleSearch->doGoogleSearch(
            '00000000000000000000000000000000',
            'PHPUnit',
            0,
            1,
            false,
            '',
            false,
            '',
            '',
            ''
          )
        );
    }
}