zsh-completion fixed reference to cmd name

cmd.Use is not the command name :). Found it once I figured out
that I need to execute the command in order to fully test the
generated completion.

zsh_completions.go

@@ -15,6 +15,7 @@ var (
 		"constructPath": constructPath,
 		"subCmdList":    subCmdList,
 		"extractFlags":  extractFlags,
+		"cmdName":       cmdName,
 		"simpleFlag":    simpleFlag,
 	}
 	zshCompletionText = `
@@ -45,7 +46,7 @@ function {{constructPath .}} {
     "*::arg:->args"
 
     case $line[1] in {{- range .Commands}}
-        {{.Use}})
+        {{cmdName .}})
             {{constructPath .}}
             ;;
 {{end}}    esac
@@ -72,7 +73,7 @@ function {{constructPath .}} {
 {{- end}}
 
 {{define "Main" -}}
-#compdef _{{.Use}} {{.Use}}
+#compdef _{{cmdName .}} {{cmdName .}}
 
 {{template "selectCmdTemplate" .}}
 {{end}}
@@ -102,14 +103,14 @@ func (c *Command) GenZshCompletion(w io.Writer) error {
 func constructPath(c *Command) string {
 	var path []string
 	tmpCmd := c
-	path = append(path, tmpCmd.Use)
+	path = append(path, tmpCmd.Name())
 
 	for {
 		if !tmpCmd.HasParent() {
 			break
 		}
 		tmpCmd = tmpCmd.Parent()
-		path = append(path, tmpCmd.Use)
+		path = append(path, tmpCmd.Name())
 	}
 
 	// reverse path
@@ -125,7 +126,7 @@ func subCmdList(c *Command) string {
 	var subCmds []string
 
 	for _, cmd := range c.Commands() {
-		subCmds = append(subCmds, cmd.Use)
+		subCmds = append(subCmds, cmd.Name())
 	}
 
 	return strings.Join(subCmds, " ")
@@ -142,6 +143,11 @@ func extractFlags(c *Command) []*pflag.Flag {
 	return flags
 }
 
+// cmdName returns the command's innvocation
+func cmdName(c *Command) string {
+	return c.Name()
+}
+
 func simpleFlag(p *pflag.Flag) bool {
 	return p.Name == "" || p.Shorthand == ""
 }

zsh_completions_test.go

@@ -21,12 +21,13 @@ func TestGenZshCompletion(t *testing.T) {
 				r := &Command{
 					Use:  "mycommand",
 					Long: "My Command long description",
+					Run:  emptyRun,
 				}
 				r.Flags().BoolVar(&debug, "debug", debug, "description")
 				return r
 			}(),
 			expectedExpressions: []string{
-				`function _mycommand {\s+_arguments \\\s+"--debug\[description\]"\s+}`,
+				`(?s)function _mycommand {\s+_arguments \\\s+"--debug\[description\]".*--help.*}`,
 				"#compdef _mycommand mycommand",
 			},
 		},
@@ -36,6 +37,7 @@ func TestGenZshCompletion(t *testing.T) {
 				r := &Command{
 					Use:  "testcmd",
 					Long: "long description",
+					Run:  emptyRun,
 				}
 				r.Flags().BoolVarP(&debug, "debug", "d", debug, "debug description")
 				return r
@@ -54,10 +56,12 @@ func TestGenZshCompletion(t *testing.T) {
 				d := &Command{
 					Use:   "subcmd1",
 					Short: "Subcmd1 short descrition",
+					Run:   emptyRun,
 				}
 				e := &Command{
 					Use:  "subcmd2",
 					Long: "Subcmd2 short description",
+					Run:  emptyRun,
 				}
 				r.PersistentFlags().BoolVar(&debug, "debug", debug, "description")
 				d.Flags().StringVarP(&option, "option", "o", option, "option description")
@@ -65,7 +69,7 @@ func TestGenZshCompletion(t *testing.T) {
 				return r
 			}(),
 			expectedExpressions: []string{
-				`\\\n\s+"1: :\(subcmd1 subcmd2\)" \\\n`,
+				`\\\n\s+"1: :\(help subcmd1 subcmd2\)" \\\n`,
 				`_arguments \\\n.*"--debug\[description]"`,
 				`_arguments -C \\\n.*"--debug\[description]"`,
 				`function _rootcmd_subcmd1 {`,
@@ -80,6 +84,7 @@ func TestGenZshCompletion(t *testing.T) {
 				r := &Command{
 					Use:   "mycmd",
 					Short: "my command short description",
+					Run:   emptyRun,
 				}
 				r.Flags().StringVarP(&file, "config", "c", file, "config file")
 				r.MarkFlagFilename("config", "ext")
@@ -93,6 +98,7 @@ func TestGenZshCompletion(t *testing.T) {
 
 	for _, tc := range tcs {
 		t.Run(tc.name, func(t *testing.T) {
+			tc.root.Execute()
 			buf := new(bytes.Buffer)
 			tc.root.GenZshCompletion(buf)
 			output := buf.Bytes()