feat: add Visual change with grouped replacement undo

src/session.rs

@@ -404,6 +404,47 @@ end
         assert!(session.editor().should_quit());
     }
 
+    #[test]
+    fn typed_visual_change_remaps_c_and_command_execution_commits_one_replacement() {
+        let fixture = Fixture::new();
+        fixture.file("buffer.txt", "abc DEF tail");
+        let mut session = fixture.open(
+            r#"
+Vamp.configure do |config|
+  config.bind "c", nil, mode: config.modes.visual
+  config.bind "ctrl+r", config.core.change, mode: config.modes.visual
+  config.bind "ctrl+v", config.core.select
+  config.bind "ctrl+f", config.core.word_end, mode: config.modes.visual
+end
+"#,
+        );
+        session.handle(Input::Char('c'));
+        assert_eq!(session.editor().mode(), crate::editor::Mode::Normal);
+        assert!(!session.editor().dirty());
+        session.handle(Input::Ctrl('v'));
+        session.handle(Input::Ctrl('f'));
+        session.handle(Input::Char('c'));
+        assert_eq!(session.editor().mode(), crate::editor::Mode::Visual);
+        assert_eq!(session.editor().lines(), &["abc DEF tail"]);
+        session.handle(Input::Ctrl('r'));
+        assert_eq!(session.editor().mode(), crate::editor::Mode::Insert);
+        assert_eq!(session.editor().cursor().column, 0);
+        assert_eq!(session.editor().lines(), &[" DEF tail"]);
+        for ch in "cZ".chars() {
+            session.handle(Input::Char(ch));
+        }
+        session.execute("w");
+        assert_eq!(session.editor().mode(), crate::editor::Mode::Normal);
+        assert_eq!(
+            fs::read_to_string(fixture.0.join("buffer.txt")).unwrap(),
+            "cZ DEF tail"
+        );
+        session.handle(Input::Char('u'));
+        assert_eq!(session.editor().lines(), &["abc DEF tail"]);
+        session.handle(Input::Char('P'));
+        assert_eq!(session.editor().lines(), &["ababcc DEF tail"]);
+    }
+
     #[test]
     fn typed_visual_actions_copy_cut_paste_and_cancel_without_splitting_history() {
         let fixture = Fixture::new();