src/Services/BaseResponse.php
public function assertSee($content)
    {
        $response = (string)$this->getResponseBody();
        PHPUnit::assertContains($content, $response, "Unable to find [$content] in response.");

        return $this;
    }
public function assertSee($content)
    {
        $response = (string)$this->getResponseBody();
        PHPUnit::assertContains($content, $response, "Unable to find [$content] in response.");

        return $this;
    }
Assert string exists in response body.

@param string $content
@return $this