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

 
 import (
 	"bytes"

 	"context"

 	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"net/http"
 	"strings"
 	"testing"
 

 	"github.com/docker/docker/api/types/image"

 	"github.com/docker/docker/errdefs"

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

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

 	}
 	_, err := client.ImageHistory(context.Background(), "nothing")
 	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 TestImageHistory(t *testing.T) {
 	expectedURL := "/images/image_id/history"
 	client := &Client{

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

 			if !strings.HasPrefix(r.URL.Path, expectedURL) {
 				return nil, fmt.Errorf("Expected URL '%s', got '%s'", expectedURL, r.URL)
 			}

 			b, err := json.Marshal([]image.HistoryResponseItem{

 				{
 					ID:   "image_id1",
 					Tags: []string{"tag1", "tag2"},
 				},
 				{
 					ID:   "image_id2",
 					Tags: []string{"tag1", "tag2"},
 				},
 			})
 			if err != nil {
 				return nil, err
 			}
 
 			return &http.Response{
 				StatusCode: http.StatusOK,
 				Body:       ioutil.NopCloser(bytes.NewReader(b)),
 			}, nil
 		}),
 	}
 	imageHistories, err := client.ImageHistory(context.Background(), "image_id")
 	if err != nil {
 		t.Fatal(err)
 	}
 	if len(imageHistories) != 2 {
 		t.Fatalf("expected 2 containers, got %v", imageHistories)
 	}
 }