text: package client
  
  import (
  	"bytes"
  	"fmt"
  	"io/ioutil"
  	"net/http"
  	"strings"
  	"testing"
  
  	"golang.org/x/net/context"
  
  	"github.com/docker/docker/api/types"
  )
  
  func TestImageCreateError(t *testing.T) {
  	client := &Client{
  		transport: newMockClient(nil, errorMock(http.StatusInternalServerError, "Server error")),
  	}
  	_, err := client.ImageCreate(context.Background(), "reference", types.ImageCreateOptions{})
  	if err == nil || err.Error() != "Error response from daemon: Server error" {
  		t.Fatalf("expected a Server error, got %v", err)
  	}
  }
  
  func TestImageCreate(t *testing.T) {
  	expectedURL := "/images/create"
  	expectedImage := "test:5000/my_image"
  	expectedTag := "sha256:ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
  	expectedReference := fmt.Sprintf("%s@%s", expectedImage, expectedTag)
  	expectedRegistryAuth := "eyJodHRwczovL2luZGV4LmRvY2tlci5pby92MS8iOnsiYXV0aCI6ImRHOTBid289IiwiZW1haWwiOiJqb2huQGRvZS5jb20ifX0="
  	client := &Client{
  		transport: newMockClient(nil, 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)
  			}
  			registryAuth := r.Header.Get("X-Registry-Auth")
  			if registryAuth != expectedRegistryAuth {
  				return nil, fmt.Errorf("X-Registry-Auth header not properly set in the request. Expected '%s', got %s", expectedRegistryAuth, registryAuth)
  			}
  
  			query := r.URL.Query()
  			fromImage := query.Get("fromImage")
  			if fromImage != expectedImage {
  				return nil, fmt.Errorf("fromImage not set in URL query properly. Expected '%s', got %s", expectedImage, fromImage)
  			}
  
  			tag := query.Get("tag")
  			if tag != expectedTag {
  				return nil, fmt.Errorf("tag not set in URL query properly. Expected '%s', got %s", expectedTag, tag)
  			}
  
  			return &http.Response{
  				StatusCode: http.StatusOK,
  				Body:       ioutil.NopCloser(bytes.NewReader([]byte("body"))),
  			}, nil
  		}),
  	}
  
  	createResponse, err := client.ImageCreate(context.Background(), expectedReference, types.ImageCreateOptions{
  		RegistryAuth: expectedRegistryAuth,
  	})
  	if err != nil {
  		t.Fatal(err)
  	}
  	response, err := ioutil.ReadAll(createResponse)
  	if err != nil {
  		t.Fatal(err)
  	}
  	if err = createResponse.Close(); err != nil {
  		t.Fatal(err)
  	}
  	if string(response) != "body" {
  		t.Fatalf("expected Body to contain 'body' string, got %s", response)
  	}
  }
  