Add unit test for ImageInspect

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

client/image_inspect_test.go

@@ -0,0 +1,97 @@
+package client
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"reflect"
+	"strings"
+	"testing"
+
+	"github.com/docker/engine-api/client/transport"
+	"github.com/docker/engine-api/types"
+)
+
+func TestImageInspectError(t *testing.T) {
+	client := &Client{
+		transport: transport.NewMockClient(nil, transport.ErrorMock(http.StatusInternalServerError, "Server error")),
+	}
+
+	_, _, err := client.ImageInspectWithRaw("nothing", true)
+	if err == nil || err.Error() != "Error response from daemon: Server error" {
+		t.Fatalf("expected a Server Error, got %v", err)
+	}
+}
+
+func TestImageInspectImageNotFound(t *testing.T) {
+	client := &Client{
+		transport: transport.NewMockClient(nil, transport.ErrorMock(http.StatusNotFound, "Server error")),
+	}
+
+	_, _, err := client.ImageInspectWithRaw("unknown", true)
+	if err == nil || !IsErrImageNotFound(err) {
+		t.Fatalf("expected a imageNotFound error, got %v", err)
+	}
+}
+
+func TestImageInspect(t *testing.T) {
+	expectedURL := "/images/image_id/json"
+	expectedTags := []string{"tag1", "tag2"}
+	inspectCases := []struct {
+		size                bool
+		expectedQueryParams map[string]string
+	}{
+		{
+			size: true,
+			expectedQueryParams: map[string]string{
+				"size": "1",
+			},
+		},
+		{
+			size: false,
+			expectedQueryParams: map[string]string{
+				"size": "",
+			},
+		},
+	}
+	for _, inspectCase := range inspectCases {
+		client := &Client{
+			transport: transport.NewMockClient(nil, 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)
+				}
+				query := req.URL.Query()
+				for key, expected := range inspectCase.expectedQueryParams {
+					actual := query.Get(key)
+					if actual != expected {
+						return nil, fmt.Errorf("%s not set in URL query properly. Expected '%s', got %s", key, expected, actual)
+					}
+				}
+				content, err := json.Marshal(types.ImageInspect{
+					ID:       "image_id",
+					RepoTags: expectedTags,
+				})
+				if err != nil {
+					return nil, err
+				}
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       ioutil.NopCloser(bytes.NewReader(content)),
+				}, nil
+			}),
+		}
+
+		imageInspect, _, err := client.ImageInspectWithRaw("image_id", inspectCase.size)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if imageInspect.ID != "image_id" {
+			t.Fatalf("expected `image_id`, got %s", imageInspect.ID)
+		}
+		if !reflect.DeepEqual(imageInspect.RepoTags, expectedTags) {
+			t.Fatalf("expected `%v`, got %v", expectedTags, imageInspect.RepoTags)
+		}
+	}
+}