test(complete): Add empty option

clap_complete/examples/exhaustive.rs

@@ -23,14 +23,21 @@ fn print_completions<G: Generator>(gen: G, cmd: &mut clap::Command) {
     generate(gen, cmd, cmd.get_name().to_string(), &mut std::io::stdout());
 }
 
+const EMPTY: [&str; 0] = [];
+
 #[allow(clippy::let_and_return)]
 fn cli() -> clap::Command {
     clap::Command::new("exhaustive")
-        .args([clap::Arg::new("generate")
-            .long("generate")
-            .value_name("SHELL")
-            .value_parser(clap::value_parser!(Shell))
-            .help("generate")])
+        .args([
+            clap::Arg::new("generate")
+                .long("generate")
+                .value_name("SHELL")
+                .value_parser(clap::value_parser!(Shell))
+                .help("generate"),
+            clap::Arg::new("empty-choice")
+                .long("empty-choice")
+                .value_parser(EMPTY),
+        ])
         .subcommands([
             clap::Command::new("empty")
                 .disable_help_subcommand(true)

clap_complete/tests/snapshots/home/static/exhaustive/bash/.bashrc

@@ -216,7 +216,7 @@ _exhaustive() {
 
     case "${cmd}" in
         exhaustive)
-            opts="-h --generate --help empty global action quote value pacman last alias hint help"
+            opts="-h --generate --empty-choice --help empty global action quote value pacman last alias hint help"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0
@@ -226,6 +226,10 @@ _exhaustive() {
                     COMPREPLY=($(compgen -W "bash elvish fish powershell zsh" -- "${cur}"))
                     return 0
                     ;;
+                --empty-choice)
+                    COMPREPLY=($(compgen -W "" -- "${cur}"))
+                    return 0
+                    ;;
                 *)
                     COMPREPLY=()
                     ;;

clap_complete/tests/snapshots/home/static/exhaustive/elvish/elvish/rc.elv

@@ -21,6 +21,7 @@ set edit:completion:arg-completer[exhaustive] = {|@words|
     var completions = [
         &'exhaustive'= {
             cand --generate 'generate'
+            cand --empty-choice 'empty-choice'
             cand -h 'Print help'
             cand --help 'Print help'
             cand empty 'empty'

clap_complete/tests/snapshots/home/static/exhaustive/fish/fish/completions/exhaustive.fish

@@ -1,6 +1,6 @@
 # Print an optspec for argparse to handle cmd's options that are independent of any subcommand.
 function __fish_exhaustive_global_optspecs
-	string join \n generate= h/help
+	string join \n generate= empty-choice= h/help
 end
 
 function __fish_exhaustive_needs_command
@@ -25,6 +25,7 @@ function __fish_exhaustive_using_subcommand
 end
 
 complete -c exhaustive -n "__fish_exhaustive_needs_command" -l generate -d 'generate' -r -f -a "{bash\t'',elvish\t'',fish\t'',powershell\t'',zsh\t''}"
+complete -c exhaustive -n "__fish_exhaustive_needs_command" -l empty-choice -r -f -a "{}"
 complete -c exhaustive -n "__fish_exhaustive_needs_command" -s h -l help -d 'Print help'
 complete -c exhaustive -n "__fish_exhaustive_needs_command" -f -a "empty"
 complete -c exhaustive -n "__fish_exhaustive_needs_command" -f -a "global"

clap_complete/tests/snapshots/home/static/exhaustive/zsh/zsh/_exhaustive

@@ -16,6 +16,7 @@ _exhaustive() {
     local context curcontext="$curcontext" state line
     _arguments "${_arguments_options[@]}" : \
 '--generate=[generate]:SHELL:(bash elvish fish powershell zsh)' \
+'--empty-choice=[]: :()' \
 '-h[Print help]' \
 '--help[Print help]' \
 ":: :_exhaustive_commands" \

clap_complete/tests/testsuite/bash.rs

@@ -164,8 +164,8 @@ fn complete() {
     let input = "exhaustive \t\t";
     let expected = snapbox::str![[r#"
 % 
--h          --help      global      quote       pacman      alias       help        
---generate  empty       action      value       last        hint        
+-h              --empty-choice  empty           action          value           last            hint
+--generate      --help          global          quote           pacman          alias           help
 "#]];
     let actual = runtime.complete(input, &term).unwrap();
     assert_data_eq!(actual, expected);
@@ -265,8 +265,8 @@ fn complete_dynamic_env_toplevel() {
     let input = "exhaustive \t\t";
     let expected = snapbox::str![[r#"
 % 
-empty       action      value       last        hint        --generate  
-global      quote       pacman      alias       help        --help      
+empty           action          value           last            hint            --generate      --help
+global          quote           pacman          alias           help            --empty-choice  
 "#]];
     let actual = runtime.complete(input, &term).unwrap();
     assert_data_eq!(actual, expected);

clap_complete/tests/testsuite/elvish.rs

@@ -162,8 +162,9 @@ fn complete() {
 
     let input = "exhaustive \t";
     let expected = snapbox::str![[r#"
-% exhaustive --generate
+% exhaustive --empty-choice
  COMPLETING argument  
+--empty-choice empty-choice                                             
 --generate     generate                                                 
 --help         Print help                                               
 -h             Print help                                               
@@ -210,10 +211,10 @@ fn complete_dynamic_env_toplevel() {
 
     let input = "exhaustive \t";
     let expected = snapbox::str![[r#"
-% exhaustive --generate
+% exhaustive --empty-choice
  COMPLETING argument  
---generate  action  empty   help  last    quote
---help      alias   global  hint  pacman  value
+--empty-choice  --help  alias  global  hint  pacman  value
+--generate      action  empty  help    last  quote 
 "#]];
     let actual = runtime.complete(input, &term).unwrap();
     assert_data_eq!(actual, expected);

clap_complete/tests/testsuite/fish.rs

@@ -208,8 +208,9 @@ fn complete_dynamic_env_toplevel() {
     let input = "exhaustive \t\t";
     let expected = snapbox::str![[r#"
 % exhaustive empty 
-empty   action  value   last   hint                                                               --generate  (generate)
-global  quote   pacman  alias  help  (Print this message or the help of the given subcommand(s))  --help    (Print help)
+empty   quote   last   help  (Print this message or the help of the given subcommand(s))  --help  (Print help)
+global  value   alias  --generate                                             (generate)  
+action  pacman  hint   --empty-choice                                                     
 "#]];
     let actual = runtime.complete(input, &term).unwrap();
     assert_data_eq!(actual, expected);

clap_complete/tests/testsuite/zsh.rs

@@ -198,10 +198,11 @@ fn complete_dynamic_env_toplevel() {
     let input = "exhaustive \t\t";
     let expected = snapbox::str![[r#"
 % exhaustive
---generate  -- generate
---help      -- Print help
-help        -- Print this message or the help of the given subcommand(s)
-action  alias   empty   global  hint    last    pacman  quote   value
+--generate      -- generate
+--help          -- Print help
+help            -- Print this message or the help of the given subcommand(s)
+--empty-choice  alias           global          last            quote           
+action          empty           hint            pacman          value           
 "#]];
     let actual = runtime.complete(input, &term).unwrap();
     assert_data_eq!(actual, expected);