diff --git a/tests/list.rs b/tests/list.rs index 4ef02e51..2dd5c022 100644 --- a/tests/list.rs +++ b/tests/list.rs @@ -1,8 +1,10 @@ use tui::{ backend::TestBackend, buffer::Buffer, + layout::Rect, style::{Color, Style}, - widgets::{List, ListState, Text}, + symbols, + widgets::{Block, Borders, List, ListState, Text}, Terminal, }; @@ -32,3 +34,56 @@ fn it_should_highlight_the_selected_item() { } assert_eq!(*terminal.backend().buffer(), expected); } + +#[test] +fn it_should_truncate_items() { + let backend = TestBackend::new(10, 2); + let mut terminal = Terminal::new(backend).unwrap(); + + struct TruncateTestCase<'a> { + name: &'a str, + selected: Option, + items: Vec>, + expected: Buffer, + } + + let cases = vec![ + TruncateTestCase { + name: "an item is selected", + selected: Some(0), + items: vec![Text::raw("A very long line"), Text::raw("A very long line")], + expected: Buffer::with_lines(vec![ + format!(">> A ve{} ", symbols::line::VERTICAL), + format!(" A ve{} ", symbols::line::VERTICAL), + ]), + }, + TruncateTestCase { + name: "no item is selected", + selected: None, + items: vec![Text::raw("A very long line"), Text::raw("A very long line")], + expected: Buffer::with_lines(vec![ + format!("A very {} ", symbols::line::VERTICAL), + format!("A very {} ", symbols::line::VERTICAL), + ]), + }, + ]; + for mut case in cases { + let mut state = ListState::default(); + state.select(case.selected); + let items = case.items.drain(..); + terminal + .draw(|mut f| { + let list = List::new(items.into_iter()) + .block(Block::default().borders(Borders::RIGHT)) + .highlight_symbol(">> "); + f.render_stateful_widget(list, Rect::new(0, 0, 8, 2), &mut state); + }) + .unwrap(); + assert_eq!( + *terminal.backend().buffer(), + case.expected, + "Failed to assert the buffer matches the expected one when {}", + case.name + ); + } +}