LazyOptionTest::testCallbackReturnsNull()

    public function testCallbackReturnsNull()
    {
        $option = \PhpOption\LazyOption::create(array($this->subject, 'execute'));

        $this->subject
            ->expects($this->once())
            ->method('execute')
            ->will($this->returnValue(\PhpOption\None::create()));

        $this->assertFalse($option->isDefined());
        $this->assertTrue($option->isEmpty());
        $this->assertEquals('alt', $option->getOrElse('alt'));
        $this->assertEquals('alt', $option->getOrCall(function(){return 'alt';}));

        $option->get();
    }