/** * @covers Guzzle\Http\Message\Response::canValidate */ public function testDeterminesIfItCanValidate() { $response = new Response(200); $this->assertFalse($response->canValidate()); $response->setHeader('ETag', '123'); $this->assertTrue($response->canValidate()); $response->removeHeader('ETag'); $this->assertFalse($response->canValidate()); $response->setHeader('Last-Modified', '123'); $this->assertTrue($response->canValidate()); }