PropertyCompositeConstraint example

        $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()
    {
        $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 Collection(['field1' => new Required([new ClassConstraint()])]));
    }

    public function testAddCompositeConstraintAcceptsNestedPropertyConstraints()
    {