/** * @test */ public function getHeaderShouldReturnHeaderOrDefault() { $response = new Response(); $this->assertNull($response->getHeader('tussi')); $this->assertSame('lussi', $response->getHeader('tussi', 'lussi')); $response->setHeader('tussi', 'watussi'); $this->assertSame('watussi', $response->getHeader('tussi', 'lussi')); }