package client // import "github.com/docker/docker/client"

 
 import (
 	"bytes"

 	"context"

 	"fmt"
 	"io/ioutil"
 	"net/http"
 	"strings"
 	"testing"
 
 	"github.com/docker/docker/api/types/swarm"

 	"github.com/docker/docker/errdefs"

 )
 
 func TestNodeUpdateError(t *testing.T) {
 	client := &Client{

 		client: newMockClient(errorMock(http.StatusInternalServerError, "Server error")),

 	}
 
 	err := client.NodeUpdate(context.Background(), "node_id", swarm.Version{}, swarm.NodeSpec{})
 	if err == nil || err.Error() != "Error response from daemon: Server error" {
 		t.Fatalf("expected a Server Error, got %v", err)
 	}

 	if !errdefs.IsSystem(err) {
 		t.Fatalf("expected a Server Error, got %T", err)
 	}

 }
 
 func TestNodeUpdate(t *testing.T) {
 	expectedURL := "/nodes/node_id/update"
 
 	client := &Client{

 		client: newMockClient(func(req *http.Request) (*http.Response, error) {

 			if !strings.HasPrefix(req.URL.Path, expectedURL) {
 				return nil, fmt.Errorf("Expected URL '%s', got '%s'", expectedURL, req.URL)
 			}
 			if req.Method != "POST" {
 				return nil, fmt.Errorf("expected POST method, got %s", req.Method)
 			}
 			return &http.Response{
 				StatusCode: http.StatusOK,
 				Body:       ioutil.NopCloser(bytes.NewReader([]byte("body"))),
 			}, nil
 		}),
 	}
 
 	err := client.NodeUpdate(context.Background(), "node_id", swarm.Version{}, swarm.NodeSpec{})
 	if err != nil {
 		t.Fatal(err)
 	}
 }