include the name of the missing object in release uninstall error (#4635)

* fix(tiller) added mock kube client to return failure on delete
Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

* fix(tiller) added object's name to delete release error message
Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

pkg/tiller/release_modules.go

@@ -18,7 +18,6 @@ package tiller
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 	"log"
 	"strings"
@@ -174,7 +173,11 @@ func DeleteRelease(rel *release.Release, vs chartutil.VersionSet, kubeClient env
 			log.Printf("uninstall: Failed deletion of %q: %s", rel.Name, err)
 			if err == kube.ErrNoObjectsVisited {
 				// Rewrite the message from "no objects visited"
-				err = errors.New("object not found, skipping delete")
+				obj := ""
+				if file.Head != nil && file.Head.Metadata != nil {
+					obj = "[" + file.Head.Kind + "] " + file.Head.Metadata.Name
+				}
+				err = fmt.Errorf("release %q: object %q not found, skipping delete", rel.Name, obj)
 			}
 			errs = append(errs, err)
 		}

pkg/tiller/release_server_test.go

@@ -498,6 +498,20 @@ func (h *hookFailingKubeClient) WatchUntilReady(ns string, r io.Reader, timeout
 	return errors.New("Failed watch")
 }
 
+func newDeleteFailingKubeClient() *deleteFailingKubeClient {
+	return &deleteFailingKubeClient{
+		PrintingKubeClient: environment.PrintingKubeClient{Out: ioutil.Discard},
+	}
+}
+
+type deleteFailingKubeClient struct {
+	environment.PrintingKubeClient
+}
+
+func (d *deleteFailingKubeClient) Delete(ns string, r io.Reader) error {
+	return kube.ErrNoObjectsVisited
+}
+
 type mockListServer struct {
 	val *services.ListReleasesResponse
 }

pkg/tiller/release_uninstall_test.go

@@ -197,3 +197,31 @@ func TestUninstallReleaseCustomDescription(t *testing.T) {
 		t.Errorf("Expected description to be %q, got %q", customDescription, res.Release.Info.Description)
 	}
 }
+
+func TestUninstallReleaseObjectNotFoundError(t *testing.T) {
+	c := helm.NewContext()
+	rs := rsFixture()
+	rel := releaseStub()
+	manifest := `kind: ConfigMap
+metadata:
+  name: configmap-foo
+data:
+  name: value
+`
+
+	rel.Manifest = manifest
+	rs.env.Releases.Create(rel)
+	rs.env.KubeClient = newDeleteFailingKubeClient()
+
+	req := &services.UninstallReleaseRequest{
+		Name: "angry-panda",
+	}
+
+	_, err := rs.UninstallRelease(c, req)
+	if err == nil {
+		t.Fatalf("Expected failure to delete")
+	}
+	if !strings.Contains(err.Error(), "configmap-foo") {
+		t.Errorf("Expected delete error message to contain object name, got:" + err.Error())
+	}
+}