Fix issue 6223 (#6241)

* Fix6223

* clippy fix

Co-authored-by: Frank <v-frankz@microsoft.com>

crates/nu-command/tests/commands/g.rs

@@ -0,0 +1,31 @@
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn list_shells() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"g | get path | length "#
+    ));
+
+    assert_eq!(actual.out, "1");
+}
+
+#[test]
+fn enter_shell() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"g 0"#
+    ));
+
+    assert!(actual.err.is_empty());
+}
+
+#[test]
+fn enter_not_exist_shell() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"g 1"#
+    ));
+
+    assert!(actual.err.contains("Not found"));
+}

crates/nu-command/tests/commands/mod.rs

@@ -22,6 +22,7 @@ mod find;
 mod first;
 mod flatten;
 mod format;
+mod g;
 mod get;
 mod group_by;
 mod hash_;