Add get values --all test case

Signed-off-by: Dean Coakley <dean.s.coakley@gmail.com>

cmd/helm/get_values_test.go

@@ -34,6 +34,11 @@ func TestGetValuesCmd(t *testing.T) {
 		golden:    "output/get-values-args.txt",
 		rels:      []*release.Release{release.Mock(&release.MockReleaseOptions{Name: "thomas-guide"})},
 		wantError: true,
+	}, {
+		name:   "get values thomas-guide (all)",
+		cmd:    "get values thomas-guide --all",
+		golden: "output/get-values-all.txt",
+		rels:   []*release.Release{release.Mock(&release.MockReleaseOptions{Name: "thomas-guide"})},
 	}, {
 		name:   "get values to json",
 		cmd:    "get values thomas-guide --output json",

cmd/helm/testdata/output/get-values-all.txt

@@ -0,0 +1,2 @@
+COMPUTED VALUES:
+name: value