Reset list of options when filter input is reset (#240)

CHANGELOG.md

@@ -4,7 +4,9 @@
 
 ## [Unreleased] <!-- ReleaseDate -->
 
-- Fix unexpected behaviour of `keep_filter` option in MultiSelect prompts, where the resulting behaviour was the opposite of what was expected.
+- Fix unexpected behaviors of `keep_filter` option in MultiSelect prompts:
+  - Filter input is now correcly getting reset **only when** `keep_filter == false`.
+  - When the filter input is reset, the list of options is reset as well. Thanks @Swivelgames for reporting [#238](https://github.com/mikaelmello/inquire/issues/238).
 
 ## [0.7.3] - 2024-03-21
 

inquire/src/prompts/multiselect/prompt.rs

@@ -148,11 +148,21 @@ where
             return ActionResult::Clean;
         }
 
+        let input_ref = match &mut self.input {
+            Some(input) => input,
+            None => return ActionResult::Clean,
+        };
+
+        if input_ref.is_empty() {
+            return ActionResult::Clean;
+        }
+
         match action {
             MultiSelectPromptAction::ToggleCurrentOption
             | MultiSelectPromptAction::SelectAll
             | MultiSelectPromptAction::ClearSelections => {
-                self.input.as_mut().map(Input::clear);
+                input_ref.clear();
+                self.run_scorer();
                 ActionResult::NeedsRedraw
             }
             _ => ActionResult::Clean,

inquire/src/prompts/multiselect/test.rs

@@ -234,3 +234,24 @@ fn keep_filter_should_be_true_by_default() {
     let expected_answer = vec![ListOption::new(0, 1)];
     assert_eq!(expected_answer, ans);
 }
+
+#[test]
+// Anti-regression test: https://github.com/mikaelmello/inquire/issues/238
+fn keep_filter_false_should_reset_option_list() {
+    let mut backend = fake_backend(vec![
+        Key::Char('3', KeyModifiers::NONE), // filter to option 3
+        Key::Char(' ', KeyModifiers::NONE), // toggle option 3, filter input is reset
+        Key::Char(' ', KeyModifiers::NONE), // toggle option 1 after option list is reset
+        Key::Enter,
+    ]);
+
+    let options = vec![1, 2, 3, 4, 5];
+
+    let ans = MultiSelect::new("Question", options)
+        .with_keep_filter(false)
+        .prompt_with_backend(&mut backend)
+        .unwrap();
+
+    let expected_answer = vec![ListOption::new(0, 1), ListOption::new(2, 3)];
+    assert_eq!(expected_answer, ans);
+}