add unittest for full json/yaml

Signed-off-by: Gong Yongjie <yong-jie.gong@microfocus.com>

cmd/helm/list_test.go

@@ -148,6 +148,16 @@ func TestListCmd(t *testing.T) {
 		cmd:    "list",
 		golden: "output/list.txt",
 		rels:   releaseFixture,
+	}, {
+		name:   "list releases in full yaml format",
+		cmd:    "list --output yaml",
+		golden: "output/list-full-yaml.txt",
+		rels:   releaseFixture,
+	}, {
+		name:   "list releases in full json format",
+		cmd:    "list --output json",
+		golden: "output/list-full-json.txt",
+		rels:   releaseFixture,
 	}, {
 		name:   "list all releases",
 		cmd:    "list --all",