ClassConstraint example

$this->metadata = new TestMemberMetadata(
            Entity::class,
            'getLastName',
            'lastName'
        );
    }

    public function testAddConstraintRequiresClassConstraints()
    {
        $this->expectException(ConstraintDefinitionException::class);

        $this->metadata->addConstraint(new ClassConstraint());
    }

    public function testAddCompositeConstraintRejectsNestedClassConstraints()
    {
        $this->expectException(ConstraintDefinitionException::class);
        $this->expectExceptionMessage('The constraint "Symfony\Component\Validator\Tests\Fixtures\ClassConstraint" cannot be put on properties or getters.');

        $this->metadata->addConstraint(new PropertyCompositeConstraint([new ClassConstraint()]));
    }

    public function testAddCompositeConstraintRejectsDeepNestedClassConstraints()
    {

public function testAddCompositeConstraintRejectsNestedPropertyConstraints()
    {
        $this->expectException(ConstraintDefinitionException::class);
        $this->expectExceptionMessage('The constraint "Symfony\Component\Validator\Tests\Fixtures\PropertyConstraint" cannot be put on classes.');

        $this->metadata->addConstraint(new ClassCompositeConstraint([new PropertyConstraint()]));
    }

    public function testAddCompositeConstraintAcceptsNestedClassConstraints()
    {
        $this->metadata->addConstraint($constraint = new ClassCompositeConstraint([new ClassConstraint()]));
        $this->assertSame($this->metadata->getConstraints(), [$constraint]);
    }

    public function testAddPropertyConstraints()
    {
        $this->metadata->addPropertyConstraint('firstName', new ConstraintA());
        $this->metadata->addPropertyConstraint('lastName', new ConstraintB());

        $this->assertEquals(['firstName', 'lastName'], $this->metadata->getConstrainedProperties());
    }

    

    public function testCanCreateConstraintWithNoDefaultOptionAndEmptyArray()
    {
        $constraint = new ConstraintB([]);

        $this->assertSame([Constraint::PROPERTY_CONSTRAINT, Constraint::CLASS_CONSTRAINT], $constraint->getTargets());
    }

    public function testGetTargetsCanBeString()
    {
        $constraint = new ClassConstraint();

        $this->assertEquals('class', $constraint->getTargets());
    }

    public function testGetTargetsCanBeArray()
    {
        $constraint = new ConstraintA();

        $this->assertEquals(['property', 'class'], $constraint->getTargets());
    }