DockerCLI/cli/internal/test/builders/service.go

package builders

import (
	"github.com/docker/docker/api/types/swarm"
)

// Service creates a service with default values.
// Any number of service builder functions can be passed to augment it.
// Currently, only ServiceName is implemented
func Service(builders ...func(*swarm.Service)) *swarm.Service {
	service := &swarm.Service{
		ID: "serviceID",
		Spec: swarm.ServiceSpec{
			Annotations: swarm.Annotations{
				Name: "defaultServiceName",
			},
			EndpointSpec: &swarm.EndpointSpec{},
		},
	}

	for _, builder := range builders {
		builder(service)
	}

	return service
}

// ServiceID sets the service ID
func ServiceID(ID string) func(*swarm.Service) {
	return func(service *swarm.Service) {
		service.ID = ID
	}
}

// ServiceName sets the service name
func ServiceName(name string) func(*swarm.Service) {
	return func(service *swarm.Service) {
		service.Spec.Annotations.Name = name
	}
}

// ServiceLabels sets the service's labels
func ServiceLabels(labels map[string]string) func(*swarm.Service) {
	return func(service *swarm.Service) {
		service.Spec.Annotations.Labels = labels
	}
}

// ReplicatedService sets the number of replicas for the service
func ReplicatedService(replicas uint64) func(*swarm.Service) {
	return func(service *swarm.Service) {
		service.Spec.Mode = swarm.ServiceMode{Replicated: &swarm.ReplicatedService{Replicas: &replicas}}
	}
}

// ServiceImage sets the service's image
func ServiceImage(image string) func(*swarm.Service) {
	return func(service *swarm.Service) {
		service.Spec.TaskTemplate = swarm.TaskSpec{ContainerSpec: swarm.ContainerSpec{Image: image}}
	}
}

// ServicePort sets the service's port
func ServicePort(port swarm.PortConfig) func(*swarm.Service) {
	return func(service *swarm.Service) {
		service.Spec.EndpointSpec.Ports = append(service.Spec.EndpointSpec.Ports, port)

		assignedPort := port
		if assignedPort.PublishedPort == 0 {
			assignedPort.PublishedPort = 30000
		}
		service.Endpoint.Ports = append(service.Endpoint.Ports, assignedPort)
	}
}