use tui::{ backend::TestBackend, buffer::Buffer, layout::Rect, style::{Color, Style}, symbols, text::Span, widgets::{Axis, Block, Borders, Chart, Dataset, GraphType::Line}, Terminal, }; fn create_labels<'a>(labels: &'a [&'a str]) -> Vec> { labels.iter().map(|l| Span::from(*l)).collect() } #[test] fn widgets_chart_can_have_axis_with_zero_length_bounds() { let backend = TestBackend::new(100, 100); let mut terminal = Terminal::new(backend).unwrap(); terminal .draw(|f| { let datasets = vec![Dataset::default() .marker(symbols::Marker::Braille) .style(Style::default().fg(Color::Magenta)) .data(&[(0.0, 0.0)])]; let chart = Chart::new(datasets) .block(Block::default().title("Plot").borders(Borders::ALL)) .x_axis( Axis::default() .bounds([0.0, 0.0]) .labels(create_labels(&["0.0", "1.0"])), ) .y_axis( Axis::default() .bounds([0.0, 0.0]) .labels(create_labels(&["0.0", "1.0"])), ); f.render_widget( chart, Rect { x: 0, y: 0, width: 100, height: 100, }, ); }) .unwrap(); } #[test] fn widgets_chart_handles_overflows() { let backend = TestBackend::new(80, 30); let mut terminal = Terminal::new(backend).unwrap(); terminal .draw(|f| { let datasets = vec![Dataset::default() .marker(symbols::Marker::Braille) .style(Style::default().fg(Color::Magenta)) .data(&[ (1_588_298_471.0, 1.0), (1_588_298_473.0, 0.0), (1_588_298_496.0, 1.0), ])]; let chart = Chart::new(datasets) .block(Block::default().title("Plot").borders(Borders::ALL)) .x_axis( Axis::default() .bounds([1_588_298_471.0, 1_588_992_600.0]) .labels(create_labels(&["1588298471.0", "1588992600.0"])), ) .y_axis( Axis::default() .bounds([0.0, 1.0]) .labels(create_labels(&["0.0", "1.0"])), ); f.render_widget( chart, Rect { x: 0, y: 0, width: 80, height: 30, }, ); }) .unwrap(); } #[test] fn widgets_chart_can_have_empty_datasets() { let backend = TestBackend::new(100, 100); let mut terminal = Terminal::new(backend).unwrap(); terminal .draw(|f| { let datasets = vec![Dataset::default().data(&[]).graph_type(Line)]; let chart = Chart::new(datasets) .block( Block::default() .title("Empty Dataset With Line") .borders(Borders::ALL), ) .x_axis( Axis::default() .bounds([0.0, 0.0]) .labels(create_labels(&["0.0", "1.0"])), ) .y_axis( Axis::default() .bounds([0.0, 1.0]) .labels(create_labels(&["0.0", "1.0"])), ); f.render_widget( chart, Rect { x: 0, y: 0, width: 100, height: 100, }, ); }) .unwrap(); } #[test] fn widgets_chart_can_have_a_legend() { let backend = TestBackend::new(60, 30); let mut terminal = Terminal::new(backend).unwrap(); terminal .draw(|f| { let datasets = vec![ Dataset::default() .name("Dataset 1") .style(Style::default().fg(Color::Blue)) .data(&[ (0.0, 0.0), (10.0, 1.0), (20.0, 2.0), (30.0, 3.0), (40.0, 4.0), (50.0, 5.0), (60.0, 6.0), (70.0, 7.0), (80.0, 8.0), (90.0, 9.0), (100.0, 10.0), ]) .graph_type(Line), Dataset::default() .name("Dataset 2") .style(Style::default().fg(Color::Green)) .data(&[ (0.0, 10.0), (10.0, 9.0), (20.0, 8.0), (30.0, 7.0), (40.0, 6.0), (50.0, 5.0), (60.0, 4.0), (70.0, 3.0), (80.0, 2.0), (90.0, 1.0), (100.0, 0.0), ]) .graph_type(Line), ]; let chart = Chart::new(datasets) .style(Style::default().bg(Color::White)) .block(Block::default().title("Chart Test").borders(Borders::ALL)) .x_axis( Axis::default() .bounds([0.0, 100.0]) .title(Span::styled("X Axis", Style::default().fg(Color::Yellow))) .labels(create_labels(&["0.0", "50.0", "100.0"])), ) .y_axis( Axis::default() .bounds([0.0, 10.0]) .title("Y Axis") .labels(create_labels(&["0.0", "5.0", "10.0"])), ); f.render_widget( chart, Rect { x: 0, y: 0, width: 60, height: 30, }, ); }) .unwrap(); let mut expected = Buffer::with_lines(vec![ "┌Chart Test────────────────────────────────────────────────┐", "│10.0│Y Axis ┌─────────┐│", "│ │ •• │Dataset 1││", "│ │ •• │Dataset 2││", "│ │ •• └─────────┘│", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ ••• •• │", "│ │ ••• │", "│5.0 │ •• •• │", "│ │ •• •• │", "│ │ ••• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• •• │", "│ │ •• ••• │", "│ │ •• •• │", "│ │ •• •• │", "│0.0 │• X Axis│", "│ └─────────────────────────────────────────────────────│", "│ 0.0 50.0 100.0 │", "└──────────────────────────────────────────────────────────┘", ]); // Set expected backgound color for row in 0..30 { for col in 0..60 { expected.get_mut(col, row).set_bg(Color::White); } } // Set expected colors of the first dataset let line1 = vec![ (48, 5), (49, 5), (46, 6), (47, 6), (44, 7), (45, 7), (42, 8), (43, 8), (40, 9), (41, 9), (38, 10), (39, 10), (36, 11), (37, 11), (34, 12), (35, 12), (33, 13), (30, 14), (31, 14), (28, 15), (29, 15), (25, 16), (26, 16), (27, 16), (23, 17), (24, 17), (21, 18), (22, 18), (19, 19), (20, 19), (17, 20), (18, 20), (15, 21), (16, 21), (13, 22), (14, 22), (11, 23), (12, 23), (9, 24), (10, 24), (7, 25), (8, 25), (6, 26), ]; let legend1 = vec![ (49, 2), (50, 2), (51, 2), (52, 2), (53, 2), (54, 2), (55, 2), (56, 2), (57, 2), ]; for (col, row) in line1 { expected.get_mut(col, row).set_fg(Color::Blue); } for (col, row) in legend1 { expected.get_mut(col, row).set_fg(Color::Blue); } // Set expected colors of the second dataset let line2 = vec![ (8, 2), (9, 2), (10, 3), (11, 3), (12, 4), (13, 4), (14, 5), (15, 5), (16, 6), (17, 6), (18, 7), (19, 7), (20, 8), (21, 8), (22, 9), (23, 9), (24, 10), (25, 10), (26, 11), (27, 11), (28, 12), (29, 12), (30, 12), (31, 13), (32, 13), (33, 14), (34, 14), (35, 15), (36, 15), (37, 16), (38, 16), (39, 17), (40, 17), (41, 18), (42, 18), (43, 19), (44, 19), (45, 20), (46, 20), (47, 21), (48, 21), (49, 22), (50, 22), (51, 23), (52, 23), (53, 23), (54, 24), (55, 24), (56, 25), (57, 25), ]; let legend2 = vec![ (49, 3), (50, 3), (51, 3), (52, 3), (53, 3), (54, 3), (55, 3), (56, 3), (57, 3), ]; for (col, row) in line2 { expected.get_mut(col, row).set_fg(Color::Green); } for (col, row) in legend2 { expected.get_mut(col, row).set_fg(Color::Green); } // Set expected colors of the x axis let x_axis_title = vec![(53, 26), (54, 26), (55, 26), (56, 26), (57, 26), (58, 26)]; for (col, row) in x_axis_title { expected.get_mut(col, row).set_fg(Color::Yellow); } terminal.backend().assert_buffer(&expected); }