git.iko.soy/helix
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helix/helix-tui/tests/widgets_list.rs
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1// use helix_tui::{
2// backend::TestBackend,
3// buffer::Buffer,
4// layout::Rect,
5// style::{Color, Style},
6// symbols,
7// widgets::{Block, Borders, List, ListItem, ListState},
8// Terminal,
9// };
11// #[test]
12// fn widgets_list_should_highlight_the_selected_item() {
13// let backend = TestBackend::new(10, 3);
14// let mut terminal = Terminal::new(backend).unwrap();
15// let mut state = ListState::default();
16// state.select(Some(1));
17// terminal
18// .draw(|f| {
19// let size = f.size();
20// let items = vec![
21// ListItem::new("Item 1"),
22// ListItem::new("Item 2"),
23// ListItem::new("Item 3"),
24// ];
25// let list = List::new(items)
26// .highlight_style(Style::default().bg(Color::Yellow))
27// .highlight_symbol(">> ");
28// f.render_stateful_widget(list, size, &mut state);
29// })
30// .unwrap();
31// let mut expected = Buffer::with_lines(vec![" Item 1 ", ">> Item 2 ", " Item 3 "]);
32// for x in 0..10 {
33// expected.get_mut(x, 1).set_bg(Color::Yellow);
34// }
35// terminal.backend().assert_buffer(&expected);
36// }
38// #[test]
39// fn widgets_list_should_truncate_items() {
40// let backend = TestBackend::new(10, 2);
41// let mut terminal = Terminal::new(backend).unwrap();
43// struct TruncateTestCase<'a> {
44// selected: Option<usize>,
45// items: Vec<ListItem<'a>>,
46// expected: Buffer,
47// }
49// let cases = vec![
50// // An item is selected
51// TruncateTestCase {
52// selected: Some(0),
53// items: vec![
54// ListItem::new("A very long line"),
55// ListItem::new("A very long line"),
56// ],
57// expected: Buffer::with_lines(vec![
58// format!(">> A ve{} ", symbols::line::VERTICAL),
59// format!(" A ve{} ", symbols::line::VERTICAL),
60// ]),
61// },
62// // No item is selected
63// TruncateTestCase {
64// selected: None,
65// items: vec![
66// ListItem::new("A very long line"),
67// ListItem::new("A very long line"),
68// ],
69// expected: Buffer::with_lines(vec![
70// format!("A very {} ", symbols::line::VERTICAL),
71// format!("A very {} ", symbols::line::VERTICAL),
72// ]),
73// },
74// ];
75// for case in cases {
76// let mut state = ListState::default();
77// state.select(case.selected);
78// terminal
79// .draw(|f| {
80// let list = List::new(case.items.clone())
81// .block(Block::default().borders(Borders::RIGHT))
82// .highlight_symbol(">> ");
83// f.render_stateful_widget(list, Rect::new(0, 0, 8, 2), &mut state);
84// })
85// .unwrap();
86// terminal.backend().assert_buffer(&case.expected);
87// }
88// }