package client import ( "bytes" "encoding/json" "fmt" "io/ioutil" "net/http" "strings" "testing" "github.com/docker/docker/api/types" "golang.org/x/net/context" ) func TestImageHistoryError(t *testing.T) { client := &Client{ transport: newMockClient(nil, 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) } } func TestImageHistory(t *testing.T) { expectedURL := "/images/image_id/history" 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) } b, err := json.Marshal([]types.ImageHistory{ { 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) } }