How to add an assert to an if ..else condition using Phpunit and selenium webdriver

I’m working on test automation for a big project and I’m using Phpunit and as a server I’m using Selenium WebDriver.

In the source code I’m using asserts like :

$this->assertContains('Project Title', $this->webDriver->getTitle());

I’m wondering how can I add the if-else condition, that when it’s false I can have a popup or to stop the test.

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