RouterCacheWarmer example

use Symfony\Component\HttpKernel\CacheWarmer\WarmableInterface;
use Symfony\Component\Routing\RouterInterface;

class RouterCacheWarmerTest extends TestCase
{
    public function testWarmUpWithWarmebleInterface()
    {
        $containerMock = $this->getMockBuilder(ContainerInterface::class)->onlyMethods(['get', 'has'])->getMock();

        $routerMock = $this->getMockBuilder(testRouterInterfaceWithWarmebleInterface::class)->onlyMethods(['match', 'generate', 'getContext', 'setContext', 'getRouteCollection', 'warmUp'])->getMock();
        $containerMock->expects($this->any())->method('get')->with('router')->willReturn($routerMock);
        $routerCacheWarmer = new RouterCacheWarmer($containerMock);

        $routerCacheWarmer->warmUp('/tmp');
        $routerMock->expects($this->any())->method('warmUp')->with('/tmp')->willReturn([]);
        $this->addToAssertionCount(1);
    }

    public function testWarmUpWithoutWarmebleInterface()
    {
        $containerMock = $this->getMockBuilder(ContainerInterface::class)->onlyMethods(['get', 'has'])->getMock();

        $routerMock = $this->getMockBuilder(testRouterInterfaceWithoutWarmebleInterface::class)->onlyMethods(['match', 'generate', 'getContext', 'setContext', 'getRouteCollection'])->getMock();