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path: root/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│",
//             "│                  │",
//             "│                  │",
//             "│                  │",
//             "│                  │",
//             "│                  │",
//             "└──────────────────┘",
//         ]),
//     );
// }