fix(widgets/list): stop highlighting blank placeholders

examples/demo/ui.rs

@@ -114,7 +114,7 @@ where
             let tasks = List::new(tasks)
                 .block(Block::default().borders(Borders::ALL).title("List"))
                 .highlight_style(Style::default().fg(Color::Yellow).modifier(Modifier::BOLD))
-                .highlight_symbol(">");
+                .highlight_symbol("> ");
             f.render_stateful_widget(tasks, chunks[0], &mut app.tasks.state);
 
             // Draw logs

src/widgets/list.rs

@@ -195,16 +195,11 @@ where
                         list_area.width as usize,
                         highlight_style,
                     );
-                    (x + 1, Some(highlight_style))
+                    (x, Some(highlight_style))
                 } else {
-                    let (x, _) = buf.set_stringn(
-                        x,
-                        y,
-                        &blank_symbol,
-                        list_area.width as usize,
-                        highlight_style,
-                    );
-                    (x + 1, None)
+                    let (x, _) =
+                        buf.set_stringn(x, y, &blank_symbol, list_area.width as usize, self.style);
+                    (x, None)
                 }
             } else {
                 (x, None)

tests/list.rs

@@ -0,0 +1,34 @@
+use tui::{
+    backend::TestBackend,
+    buffer::Buffer,
+    style::{Color, Style},
+    widgets::{List, ListState, Text},
+    Terminal,
+};
+
+#[test]
+fn it_should_highlight_the_selected_item() {
+    let backend = TestBackend::new(10, 3);
+    let mut terminal = Terminal::new(backend).unwrap();
+    let mut state = ListState::default();
+    state.select(Some(1));
+    terminal
+        .draw(|mut f| {
+            let size = f.size();
+            let items = vec![
+                Text::raw("Item 1"),
+                Text::raw("Item 2"),
+                Text::raw("Item 3"),
+            ];
+            let list = List::new(items.into_iter())
+                .highlight_style(Style::default().bg(Color::Yellow))
+                .highlight_symbol(">> ");
+            f.render_stateful_widget(list, size, &mut state);
+        })
+        .unwrap();
+    let mut expected = Buffer::with_lines(vec!["   Item 1 ", ">> Item 2 ", "   Item 3 "]);
+    for x in 0..9 {
+        expected.get_mut(x, 1).set_bg(Color::Yellow);
+    }
+    assert_eq!(*terminal.backend().buffer(), expected);
+}