AddIntersectionVarToMockObjectPropertyRector.php

<?php

declare(strict_types=1);

namespace Rector\PHPUnit\CodeQuality\Rector\Class_;

use PhpParser\Node;
use PhpParser\Node\Expr\ClassConstFetch;
use PhpParser\Node\Expr\MethodCall;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\ClassMethod;
use PhpParser\Node\Stmt\Property;
use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfoFactory;
use Rector\BetterPhpDocParser\PhpDocManipulator\PhpDocTypeChanger;
use Rector\BetterPhpDocParser\ValueObject\Type\BracketsAwareIntersectionTypeNode;
use Rector\PHPUnit\CodeQuality\NodeAnalyser\MockObjectPropertyDetector;
use Rector\PHPUnit\Enum\PHPUnitClassName;
use Rector\PHPUnit\NodeAnalyzer\TestsNodeAnalyzer;
use Rector\Rector\AbstractRector;
use Rector\ValueObject\MethodName;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;

/**
 * @see \Rector\PHPUnit\Tests\CodeQuality\Rector\Class_\AddIntersectionVarToMockObjectPropertyRector\AddIntersectionVarToMockObjectPropertyRectorTest
 */
final class AddIntersectionVarToMockObjectPropertyRector extends AbstractRector
{
    public function __construct(
        private readonly TestsNodeAnalyzer $testsNodeAnalyzer,
        private readonly MockObjectPropertyDetector $mockObjectPropertyDetector,
        private readonly PhpDocInfoFactory $phpDocInfoFactory,
        private readonly PhpDocTypeChanger $phpDocTypeChanger,
    ) {
    }

    public function getNodeTypes(): array
    {
        return [Class_::class];
    }

    /**
     * @param Class_ $node
     */
    public function refactor(Node $node): ?Class_
    {
        if (! $this->testsNodeAnalyzer->isInTestClass($node)) {
            return null;
        }

        $setUpClassMethod = $node->getMethod(MethodName::SET_UP);
        if (! $setUpClassMethod instanceof ClassMethod) {
            return null;
        }

        $propertyNamesToCreateMockMethodCalls = $this->mockObjectPropertyDetector->collectFromClassMethod(
            $setUpClassMethod
        );
        if ($propertyNamesToCreateMockMethodCalls === []) {
            return null;
        }

        $hasChanged = false;

        foreach ($propertyNamesToCreateMockMethodCalls as $propertyName => $createMockMethodCall) {
            $property = $node->getProperty($propertyName);
            if (! $property instanceof Property) {
                continue;
            }

            // only properties typed as a bare native MockObject
            if (! $this->mockObjectPropertyDetector->detect($property)) {
                continue;
            }

            $mockedClass = $this->resolveMockedClass($createMockMethodCall);
            if ($mockedClass === null) {
                continue;
            }

            $intersectionTypeNode = new BracketsAwareIntersectionTypeNode([
                new IdentifierTypeNode('\\' . PHPUnitClassName::MOCK_OBJECT),
                new IdentifierTypeNode('\\' . $mockedClass),
            ]);

            $phpDocInfo = $this->phpDocInfoFactory->createFromNodeOrEmpty($property);
            $this->phpDocTypeChanger->changeVarTypeNode($property, $phpDocInfo, $intersectionTypeNode);

            $hasChanged = true;
        }

        if (! $hasChanged) {
            return null;
        }

        return $node;
    }

    public function getRuleDefinition(): RuleDefinition
    {
        return new RuleDefinition(
            'Add a MockObject intersection @var docblock with the mocked class to a native MockObject property',
            [
                new CodeSample(
                    <<<'CODE_SAMPLE'
use PHPUnit\Framework\TestCase;

final class SomeTest extends TestCase
{
    private \PHPUnit\Framework\MockObject\MockObject $someServiceMock;

    protected function setUp(): void
    {
        $this->someServiceMock = $this->createMock(SomeService::class);
    }
}
CODE_SAMPLE
                    ,
                    <<<'CODE_SAMPLE'
use PHPUnit\Framework\TestCase;

final class SomeTest extends TestCase
{
    /**
     * @var \PHPUnit\Framework\MockObject\MockObject&\SomeService
     */
    private \PHPUnit\Framework\MockObject\MockObject $someServiceMock;

    protected function setUp(): void
    {
        $this->someServiceMock = $this->createMock(SomeService::class);
    }
}
CODE_SAMPLE
                ),
            ]
        );
    }

    private function resolveMockedClass(MethodCall $methodCall): ?string
    {
        $firstArg = $methodCall->getArgs()[0] ?? null;
        if ($firstArg === null) {
            return null;
        }

        if (! $firstArg->value instanceof ClassConstFetch) {
            return null;
        }

        $className = $this->getName($firstArg->value->class);
        if (! is_string($className)) {
            return null;
        }

        return $className;
    }
}