From b9643478959d1c260057cea04583063a34aa2c6f Mon Sep 17 00:00:00 2001
From: Antoine Stevan <44101798+amtoine@users.noreply.github.com>
Date: Tue, 8 Aug 2023 19:10:34 +0200
Subject: [PATCH] add a test to make sure "nothing" shows up as "nothing" in
 help (#9941)

related to
- https://github.com/nushell/nushell/pull/9935

# Description
this PR just adds a test to make sure type annotations in `def`s show as
`nothing` in the help pages of commands.

# User-Facing Changes

# Tests + Formatting
adds a new test `nothing_type_annotation`.

# After Submitting
---
 crates/nu-command/tests/commands/help.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/crates/nu-command/tests/commands/help.rs b/crates/nu-command/tests/commands/help.rs
index cad6aeab2f..32e01c1c0f 100644
--- a/crates/nu-command/tests/commands/help.rs
+++ b/crates/nu-command/tests/commands/help.rs
@@ -380,3 +380,14 @@ fn help_alias_before_command() {
 
     assert!(actual.out.contains("Alias"));
 }
+
+#[test]
+fn nothing_type_annotation() {
+    let actual = nu!(pipeline(
+        "
+        def foo []: nothing -> nothing {};
+        help commands | where name == foo | get input_output.0.output.0
+    "
+    ));
+    assert_eq!(actual.out, "nothing");
+}