Add upgrade dependency update test

Signed-off-by: David Mládek <david.mladek.cz@gmail.com>

cmd/helm/testdata/output/upgrade-with-dependency-update.txt

@@ -0,0 +1,9 @@
+Release "funny-bunny" has been upgraded. Happy Helming!
+NAME: funny-bunny
+LAST DEPLOYED: Fri Sep  2 22:04:05 1977
+NAMESPACE: default
+STATUS: deployed
+REVISION: 3
+TEST SUITE: None
+NOTES:
+PARENT NOTES

cmd/helm/testdata/testcharts/chart-with-subchart-update/Chart.lock

@@ -0,0 +1,6 @@
+dependencies:
+- name: subchart-with-notes
+  repository: file://../chart-with-subchart-notes/charts/subchart-with-notes
+  version: 0.0.1
+digest: sha256:8ca45f73ae3f6170a09b64a967006e98e13cd91eb51e5ab0599bb87296c7df0a
+generated: "2021-05-02T15:07:22.1099921+02:00"

cmd/helm/upgrade_test.go

@@ -32,6 +32,7 @@ import (
 )
 
 func TestUpgradeCmd(t *testing.T) {
+
 	tmpChart := ensure.TempDir(t)
 	cfile := &chart.Chart{
 		Metadata: &chart.Metadata{
@@ -79,6 +80,7 @@ func TestUpgradeCmd(t *testing.T) {
 
 	missingDepsPath := "testdata/testcharts/chart-missing-deps"
 	badDepsPath := "testdata/testcharts/chart-bad-requirements"
+	presentDepsPath := "testdata/testcharts/chart-with-subchart-update"
 
 	relWithStatusMock := func(n string, v int, ch *chart.Chart, status release.Status) *release.Release {
 		return release.Mock(&release.MockReleaseOptions{Name: n, Version: v, Chart: ch, Status: status})
@@ -149,6 +151,12 @@ func TestUpgradeCmd(t *testing.T) {
 			golden:    "output/upgrade-with-bad-dependencies.txt",
 			wantError: true,
 		},
+		{
+			name:   "upgrade a release with resolving missing dependencies",
+			cmd:    fmt.Sprintf("upgrade --dependency-update funny-bunny %s", presentDepsPath),
+			golden: "output/upgrade-with-dependency-update.txt",
+			rels:   []*release.Release{relMock("funny-bunny", 2, ch2)},
+		},
 		{
 			name:      "upgrade a non-existent release",
 			cmd:       fmt.Sprintf("upgrade funny-bunny '%s'", chartPath),