feat: better testing (#131)

* add tests

* update github actions to include testing step

* optimization

pwsp-gui/src/gui/input.rs

@@ -217,3 +217,70 @@ impl SoundpadGui {
         // });
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use egui::{Key, Modifiers};
+
+    #[test]
+    fn test_chord_from_event() {
+        // Valid modifier + key
+        let mut mods = Modifiers::NONE;
+        mods.ctrl = true;
+        let chord = chord_from_event(&mods, &Key::A);
+        assert_eq!(chord, Some("Ctrl+A".to_string()));
+
+        // Multiple modifiers
+        mods.shift = true;
+        let chord = chord_from_event(&mods, &Key::F1);
+        assert_eq!(chord, Some("Ctrl+Shift+F1".to_string()));
+
+        // Missing modifiers (requires at least one modifier)
+        let no_mods = Modifiers::NONE;
+        let chord = chord_from_event(&no_mods, &Key::A);
+        assert_eq!(chord, None);
+
+        // Invalid keys (e.g. Escape or Enter shouldn't be accepted by chord_from_event)
+        mods.shift = false;
+        let chord = chord_from_event(&mods, &Key::Escape);
+        assert_eq!(chord, None);
+    }
+
+    #[test]
+    fn test_parse_chord() {
+        // Valid Ctrl+A
+        let res = parse_chord("Ctrl+A");
+        assert!(res.is_some());
+        let (mods, key) = res.unwrap();
+        assert!(mods.ctrl);
+        assert!(!mods.alt);
+        assert!(!mods.shift);
+        assert_eq!(key, Key::A);
+
+        // Valid Ctrl+Shift+F12
+        let res = parse_chord("Ctrl+Shift+F12");
+        assert!(res.is_some());
+        let (mods, key) = res.unwrap();
+        assert!(mods.ctrl);
+        assert!(mods.shift);
+        assert!(!mods.alt);
+        assert_eq!(key, Key::F12);
+
+        // Valid Ctrl+Alt+Shift+Super+B
+        let res = parse_chord("Ctrl+Alt+Shift+Super+B");
+        assert!(res.is_some());
+        let (mods, key) = res.unwrap();
+        assert!(mods.ctrl);
+        assert!(mods.alt);
+        assert!(mods.shift);
+        assert!(mods.command); // Super maps to command in egui Modifiers
+        assert_eq!(key, Key::B);
+
+        // Invalid keys/chords
+        assert!(parse_chord("").is_none());
+        assert!(parse_chord("Ctrl+").is_none());
+        assert!(parse_chord("Ctrl+Escape").is_none());
+        assert!(parse_chord("Invalid+A").is_none());
+    }
+}

pwsp-gui/src/gui/mod.rs

@@ -294,3 +294,45 @@ pub async fn run() -> Result<()> {
         Err(e) => Err(anyhow!(e.to_string())),
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_get_filtered_files() {
+        let mut gui = SoundpadGui {
+            app_state: AppState::default(),
+            config: GuiConfig::default(),
+            audio_player_state: AudioPlayerState::default(),
+            audio_player_state_shared: Arc::new(Mutex::new(AudioPlayerState::default())),
+        };
+
+        // Create some dummy paths
+        // We will mock path properties using standard Rust PathBuf
+        let dir_a = PathBuf::from("a_dir");
+        let file_b = PathBuf::from("b_file.mp3");
+        let file_c = PathBuf::from("c_file.wav");
+        let file_txt = PathBuf::from("invalid.txt");
+
+        gui.app_state.listed_files.insert(dir_a.clone());
+        gui.app_state.listed_files.insert(file_b.clone());
+        gui.app_state.listed_files.insert(file_c.clone());
+        gui.app_state.listed_files.insert(file_txt.clone());
+
+        // Note: is_dir() check in get_filtered_files relies on physical filesystem properties.
+        // On the real OS filesystem, these paths don't exist, so they are treated as files.
+        // Unsupported extensions (like .txt) will be filtered out.
+        // So we expect only file_b and file_c, sorted alphabetically.
+        let filtered = gui.get_filtered_files();
+        assert_eq!(filtered.len(), 2);
+        assert_eq!(filtered[0], file_b);
+        assert_eq!(filtered[1], file_c);
+
+        // Test search query
+        gui.app_state.search_query = "c_fi".to_string();
+        let filtered_search = gui.get_filtered_files();
+        assert_eq!(filtered_search.len(), 1);
+        assert_eq!(filtered_search[0], file_c);
+    }
+}

pwsp-gui/src/gui/views/mod.rs

@@ -30,3 +30,26 @@ impl SoundpadGui {
         self.draw_footer(ui);
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_get_volume_icon() {
+        assert_eq!(SoundpadGui::get_volume_icon(0.8), ICON_VOLUME_UP.codepoint);
+        assert_eq!(SoundpadGui::get_volume_icon(0.0), ICON_VOLUME_OFF.codepoint);
+        assert_eq!(
+            SoundpadGui::get_volume_icon(-0.1),
+            ICON_VOLUME_OFF.codepoint
+        );
+        assert_eq!(
+            SoundpadGui::get_volume_icon(0.2),
+            ICON_VOLUME_MUTE.codepoint
+        );
+        assert_eq!(
+            SoundpadGui::get_volume_icon(0.5),
+            ICON_VOLUME_DOWN.codepoint
+        );
+    }
+}