Наследование: extends DeploymentSpecification
 public function test_Should_GetSatisfyingElements_When_DeploymentsDoNotExists()
 {
     $date = new DateTime();
     $spec = new OldDeploymentSpecification($date);
     $deployments = collect([]);
     $this->mockProjectModel->shouldReceive('getDeployments')->once()->andReturn($deployments);
     $oldDeployments = $spec->satisfyingElementsFrom($this->mockProjectModel);
     $this->assertEmpty($oldDeployments);
 }