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helix/helix-tui/tests/widgets_paragraph.rs

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// use helix_tui::{
// backend::TestBackend,
// buffer::Buffer,
// layout::Alignment,
// text::{Span, Spans, Text},
// widgets::{Block, Borders, Paragraph, Wrap},
// Terminal,
// };
// const SAMPLE_STRING: &str = "The library is based on the principle of immediate rendering with \
// intermediate buffers. This means that at each new frame you should build all widgets that are \
// supposed to be part of the UI. While providing a great flexibility for rich and \
// interactive UI, this may introduce overhead for highly dynamic content.";
// #[test]
// fn widgets_paragraph_can_wrap_its_content() {
// let test_case = |alignment, expected| {
// let backend = TestBackend::new(20, 10);
// let mut terminal = Terminal::new(backend).unwrap();
// terminal
// .draw(|f| {
// let size = f.size();
// let text = vec![Spans::from(SAMPLE_STRING)];
// let paragraph = Paragraph::new(text)
// .block(Block::default().borders(Borders::ALL))
// .alignment(alignment)
// .wrap(Wrap { trim: true });
// f.render_widget(paragraph, size);
// })
// .unwrap();
// terminal.backend().assert_buffer(&expected);
// };
// test_case(
// Alignment::Left,
// Buffer::with_lines(vec![
// "┌──────────────────┐",
// "│The library is │",
// "│based on the │",
// "│principle of │",
// "│immediate │",
// "│rendering with │",
// "│intermediate │",
// "│buffers. This │",
// "│means that at each│",
// "└──────────────────┘",
// ]),
// );
// test_case(
// Alignment::Right,
// Buffer::with_lines(vec![
// "┌──────────────────┐",
// "│ The library is│",
// "│ based on the│",
// "│ principle of│",
// "│ immediate│",
// "│ rendering with│",
// "│ intermediate│",
// "│ buffers. This│",
// "│means that at each│",
// "└──────────────────┘",
// ]),
// );
// test_case(
// Alignment::Center,
// Buffer::with_lines(vec![
// "┌──────────────────┐",
// "│ The library is │",
// "│ based on the │",
// "│ principle of │",
// "│ immediate │",
// "│ rendering with │",
// "│ intermediate │",
// "│ buffers. This │",
// "│means that at each│",
// "└──────────────────┘",
// ]),
// );
// }
// #[test]
// fn widgets_paragraph_renders_double_width_graphemes() {
// let backend = TestBackend::new(10, 10);
// let mut terminal = Terminal::new(backend).unwrap();
// let s = "コンピュータ上で文字を扱う場合、典型的には文字による通信を行う場合にその両端点では、";
// terminal
// .draw(|f| {
// let size = f.size();
// let text = vec![Spans::from(s)];
// let paragraph = Paragraph::new(text)
// .block(Block::default().borders(Borders::ALL))
// .wrap(Wrap { trim: true });
// f.render_widget(paragraph, size);
// })
// .unwrap();
// let expected = Buffer::with_lines(vec![
// "┌────────┐",
// "│コンピュ│",
// "│ータ上で│",
// "│文字を扱│",
// "│う場合、│",
// "│典型的に│",
// "│は文字に│",
// "│よる通信│",
// "│を行う場│",
// "└────────┘",
// ]);
// terminal.backend().assert_buffer(&expected);
// }
// #[test]
// fn widgets_paragraph_renders_mixed_width_graphemes() {
// let backend = TestBackend::new(10, 7);
// let mut terminal = Terminal::new(backend).unwrap();
// let s = "aコンピュータ上で文字を扱う場合、";
// terminal
// .draw(|f| {
// let size = f.size();
// let text = vec![Spans::from(s)];
// let paragraph = Paragraph::new(text)
// .block(Block::default().borders(Borders::ALL))
// .wrap(Wrap { trim: true });
// f.render_widget(paragraph, size);
// })
// .unwrap();
// let expected = Buffer::with_lines(vec![
// // The internal width is 8 so only 4 slots for double-width characters.
// "┌────────┐",
// "│aコンピ │", // Here we have 1 latin character so only 3 double-width ones can fit.
// "│ュータ上│",
// "│で文字を│",
// "│扱う場合│",
// "│、 │",
// "└────────┘",
// ]);
// terminal.backend().assert_buffer(&expected);
// }
// #[test]
// fn widgets_paragraph_can_wrap_with_a_trailing_nbsp() {
// let nbsp: &str = "\u{00a0}";
// let line = Spans::from(vec![Span::raw("NBSP"), Span::raw(nbsp)]);
// let backend = TestBackend::new(20, 3);
// let mut terminal = Terminal::new(backend).unwrap();
// let expected = Buffer::with_lines(vec![
// "┌──────────────────┐",
// "│NBSP\u{00a0} │",
// "└──────────────────┘",
// ]);
// terminal
// .draw(|f| {
// let size = f.size();
// let paragraph = Paragraph::new(line).block(Block::default().borders(Borders::ALL));
// f.render_widget(paragraph, size);
// })
// .unwrap();
// terminal.backend().assert_buffer(&expected);
// }
// #[test]
// fn widgets_paragraph_can_scroll_horizontally() {
// let test_case = |alignment, scroll, expected| {
// let backend = TestBackend::new(20, 10);
// let mut terminal = Terminal::new(backend).unwrap();
// terminal
// .draw(|f| {
// let size = f.size();
// let text = Text::from(
// "段落现在可以水平滚动了!\nParagraph can scroll horizontally!\nShort line",
// );
// let paragraph = Paragraph::new(text)
// .block(Block::default().borders(Borders::ALL))
// .alignment(alignment)
// .scroll(scroll);
// f.render_widget(paragraph, size);
// })
// .unwrap();
// terminal.backend().assert_buffer(&expected);
// };
// test_case(
// Alignment::Left,
// (0, 7),
// Buffer::with_lines(vec![
// "┌──────────────────┐",
// "│在可以水平滚动了!│",
// "│ph can scroll hori│",
// "│ine │",
// "│ │",
// "│ │",
// "│ │",
// "│ │",
// "│ │",
// "└──────────────────┘",
// ]),
// );
// // only support Alignment::Left
// test_case(
// Alignment::Right,
// (0, 7),
// Buffer::with_lines(vec![
// "┌──────────────────┐",
// "│段落现在可以水平滚│",
// "│Paragraph can scro│",
// "│ Short line│",
// "│ │",
// "│ │",
// "│ │",
// "│ │",
// "│ │",
// "└──────────────────┘",
// ]),
// );
// }