--TEST--
https://github.com/sebastianbergmann/phpunit-mock-objects/issues/397
--SKIPIF--
<?php
if (!version_compare(PHP_VERSION, '7.1', '>=')) print 'skip: PHP >= 7.1 required';
--FILE--
<?php
class C
{
    public function m(?self $other): self
    {
    }
}

require __DIR__ . '/../../vendor/autoload.php';

$generator = new \PHPUnit\Framework\MockObject\Generator;

$mock = $generator->generate(
    C::class,
    [],
    'MockC',
    true,
    true
);

print $mock['code'];
--EXPECT--
class MockC extends C implements PHPUnit\Framework\MockObject\MockObject
{
    private $__phpunit_invocationMocker;
    private $__phpunit_originalObject;
    private $__phpunit_configurable = ['m'];
    private $__phpunit_returnValueGeneration = true;

    public function __clone()
    {
        $this->__phpunit_invocationMocker = clone $this->__phpunit_getInvocationMocker();
    }

    public function m(?C $other): C
    {
        $__phpunit_arguments = [$other];
        $__phpunit_count     = func_num_args();

        if ($__phpunit_count > 1) {
            $__phpunit_arguments_tmp = func_get_args();

            for ($__phpunit_i = 1; $__phpunit_i < $__phpunit_count; $__phpunit_i++) {
                $__phpunit_arguments[] = $__phpunit_arguments_tmp[$__phpunit_i];
            }
        }

        $__phpunit_result = $this->__phpunit_getInvocationMocker()->invoke(
            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
                'C', 'm', $__phpunit_arguments, 'C', $this, true
            )
        );

        return $__phpunit_result;
    }

    public function expects(\PHPUnit\Framework\MockObject\Matcher\Invocation $matcher)
    {
        return $this->__phpunit_getInvocationMocker()->expects($matcher);
    }

    public function method()
    {
        $any     = new \PHPUnit\Framework\MockObject\Matcher\AnyInvokedCount;
        $expects = $this->expects($any);

        return call_user_func_array([$expects, 'method'], func_get_args());
    }

    public function __phpunit_setOriginalObject($originalObject)
    {
        $this->__phpunit_originalObject = $originalObject;
    }

    public function __phpunit_setReturnValueGeneration(bool $returnValueGeneration)
    {
        $this->__phpunit_returnValueGeneration = $returnValueGeneration;
    }

    public function __phpunit_getInvocationMocker()
    {
        if ($this->__phpunit_invocationMocker === null) {
            $this->__phpunit_invocationMocker = new \PHPUnit\Framework\MockObject\InvocationMocker($this->__phpunit_configurable, $this->__phpunit_returnValueGeneration);
        }

        return $this->__phpunit_invocationMocker;
    }

    public function __phpunit_hasMatchers()
    {
        return $this->__phpunit_getInvocationMocker()->hasMatchers();
    }

    public function __phpunit_verify($unsetInvocationMocker = true)
    {
        $this->__phpunit_getInvocationMocker()->verify();

        if ($unsetInvocationMocker) {
            $this->__phpunit_invocationMocker = null;
        }
    }
}