public function testCanGetTheImageExtension() { $this->assertNull($this->url->getExtension(), 'extension should initialy be null'); $this->url->jpg(); $this->assertSame('jpg', $this->url->getExtension(), 'Could not fetch extension after setting it to jpg'); $this->url->png(); $this->assertSame('png', $this->url->getExtension(), 'Could not fetch extension after setting it to png'); $this->url->gif(); $this->assertSame('gif', $this->url->getExtension(), 'Could not fetch extension after setting it to gif'); }