Add unit tests for ImageCreate

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

client/image_create_test.go

@@ -0,0 +1,78 @@
+package client
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"testing"
+
+	"golang.org/x/net/context"
+
+	"github.com/docker/engine-api/client/transport"
+	"github.com/docker/engine-api/types"
+)
+
+func TestImageCreateError(t *testing.T) {
+	client := &Client{
+		transport: transport.NewMockClient(nil, transport.ErrorMock(http.StatusInternalServerError, "Server error")),
+	}
+	_, err := client.ImageCreate(context.Background(), 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 := "my_image"
+	expectedTag := "another:image"
+	expectedRegistryAuth := "eyJodHRwczovL2luZGV4LmRvY2tlci5pby92MS8iOnsiYXV0aCI6ImRHOTBid289IiwiZW1haWwiOiJqb2huQGRvZS5jb20ifX0="
+	client := &Client{
+		transport: 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(), types.ImageCreateOptions{
+		Parent:       expectedImage,
+		Tag:          expectedTag,
+		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)
+	}
+}