use tui::{
backend::TestBackend,
buffer::Buffer,
layout::{Alignment, Rect},
style::{Color, Style},
text::Span,
widgets::{Block, Borders},
Terminal,
};
#[test]
fn widgets_block_renders() {
let backend = TestBackend::new(10, 10);
let mut terminal = Terminal::new(backend).unwrap();
terminal
.draw(|f| {
let block = Block::default()
.title(Span::styled("Title", Style::default().fg(Color::LightBlue)))
.borders(Borders::ALL);
f.render_widget(
block,
Rect {
x: 0,
y: 0,
width: 8,
height: 8,
},
);
})
.unwrap();
let mut expected = Buffer::with_lines(vec![
"┌Title─┐ ",
"│ │ ",
"│ │ ",
"│ │ ",
"│ │ ",
"│ │ ",
"│ │ ",
"└──────┘ ",
" ",
" ",
]);
for x in 1..=5 {
expected.get_mut(x, 0).set_fg(Color::LightBlue);
}
terminal.backend().assert_buffer(&expected);
}
#[test]
fn widgets_block_renders_on_small_areas() {
let test_case = |block, area: Rect, expected| {
let backend = TestBackend::new(area.width, area.height);
let mut terminal = Terminal::new(backend).unwrap();
terminal
.draw(|f| {
f.render_widget(block, area);
})
.unwrap();
terminal.backend().assert_buffer(&expected);
};
let one_cell_test_cases = [
(Borders::NONE, "T"),
(Borders::LEFT, "│"),
(Borders::TOP, "T"),
(Borders::RIGHT, "│"),
(Borders::BOTTOM, "T"),
(Borders::ALL, "┌"),
];
for (borders, symbol) in one_cell_test_cases.iter().cloned() {
test_case(
Block::default().title("Test").borders(borders),
Rect {
x: 0,
y: 0,
width: 0,
height: 0,
},
Buffer::empty(Rect {
x: 0,
y: 0,
width: 0,
height: 0,
}),
);
test_case(
Block::default().title("Test").borders(borders),
Rect {
x: 0,
y: 0,
width: 1,
height: 0,
},
Buffer::empty(Rect {
x: 0,
y: 0,
width: 1,
height: 0,
}),
);
test_case(
Block::default().title("Test").borders(borders),
Rect {
x: 0,
y: 0,
width: 0,
height: 1,
},
Buffer::empty(Rect {
x: 0,
y: 0,
width: 0,
height: 1,
}),
);
test_case(
Block::default().title("Test").borders(borders),
Rect {
x: 0,
y: 0,
width: 1,
height: 1,
},
Buffer::with_lines(vec![symbol]),
);
}
test_case(
Block::default().title("Test").borders(Borders::LEFT),
Rect {
x: 0,
y: 0,
width: 4,
height: 1,
},
Buffer::with_lines(vec!["│Tes"]),
);
test_case(
Block::default().title("Test").borders(Borders::RIGHT),
Rect {
x: 0,
y: 0,
width: 4,
height: 1,
},
Buffer::with_lines(vec!["Tes│"]),
);
test_case(
Block::default().title("Test").borders(Borders::RIGHT),
Rect {
x: 0,
y: 0,
width: 4,
height: 1,
},
Buffer::with_lines(vec!["Tes│"]),
);
test_case(
Block::default()
.title("Test")
.borders(Borders::LEFT | Borders::RIGHT),
Rect {
x: 0,
y: 0,
width: 4,
height: 1,
},
Buffer::with_lines(vec!["│Te│"]),
);
test_case(
Block::default().title("Test").borders(Borders::TOP),
Rect {
x: 0,
y: 0,
width: 4,
height: 1,
},
Buffer::with_lines(vec!["Test"]),
);
test_case(
Block::default().title("Test").borders(Borders::TOP),
Rect {
x: 0,
y: 0,
width: 5,
height: 1,
},
Buffer::with_lines(vec!["Test─"]),
);
test_case(
Block::default()
.title("Test")
.borders(Borders::LEFT | Borders::TOP),
Rect {
x: 0,
y: 0,
width: 5,
height: 1,
},
Buffer::with_lines(vec!["┌Test"]),
);
test_case(
Block::default()
.title("Test")
.borders(Borders::LEFT | Borders::TOP),
Rect {
x: 0,
y: 0,
width: 6,
height: 1,
},
Buffer::with_lines(vec!["┌Test─"]),
);
}
#[test]
fn widgets_block_title_alignment() {
let test_case = |alignment, borders, expected| {
let backend = TestBackend::new(15, 2);
let mut terminal = Terminal::new(backend).unwrap();
let block = Block::default()
.title(Span::styled("Title", Style::default()))
.title_alignment(alignment)
.borders(borders);
let area = Rect {
x: 1,
y: 0,
width: 13,
height: 2,
};
terminal
.draw(|f| {
f.render_widget(block, area);
})
.unwrap();
terminal.backend().assert_buffer(&expected);
};
test_case(
Alignment::Left,
Borders::ALL,
Buffer::with_lines(vec![" ┌Title──────┐ ", " └───────────┘ "]),
);
test_case(
Alignment::Left,
Borders::LEFT | Borders::BOTTOM | Borders::RIGHT,
Buffer::with_lines(vec![" │Title │ ", " └───────────┘ "]),
);
test_case(
Alignment::Left,
Borders::TOP | Borders::RIGHT | Borders::BOTTOM,
Buffer::with_lines(vec![" Title───────┐ ", " ────────────┘ "]),
);
test_case(
Alignment::Left,
Borders::LEFT | Borders::TOP | Borders::BOTTOM,
Buffer::with_lines(vec![" ┌Title─────── ", " └──────────── "]),
);
test_case(
Alignment::Left,
Borders::NONE,
Buffer::with_lines(vec![" Title ", " "]),
);
test_case(
Alignment::Center,
Borders::ALL,
Buffer::with_lines(vec![" ┌───Title───┐ ", " └───────────┘ "]),
);
test_case(
Alignment::Center,
Borders::LEFT | Borders::BOTTOM | Borders::RIGHT,
Buffer::with_lines(vec![" │ Title │ ", " └───────────┘ "]),
);
test_case(
Alignment::Center,
Borders::TOP | Borders::RIGHT | Borders::BOTTOM,
Buffer::with_lines(vec![" ────Title───┐ ", " ────────────┘ "]),
);
test_case(
Alignment::Center,
Borders::LEFT | Borders::TOP | Borders::BOTTOM,
Buffer::with_lines(vec![" ┌───Title──── ", " └──────────── "]),
);
test_case(
Alignment::Center,
Borders::NONE,
Buffer::with_lines(vec![" Title ", " "]),
);
test_case(
Alignment::Right,
Borders::ALL,
Buffer::with_lines(vec![" ┌──────Title┐ ", " └───────────┘ "]),
);
test_case(
Alignment::Right,
Borders::LEFT | Borders::BOTTOM | Borders::RIGHT,
Buffer::with_lines(vec![" │ Title│ ", " └───────────┘ "]),
);
test_case(
Alignment::Right,
Borders::TOP | Borders::RIGHT | Borders::BOTTOM,
Buffer::with_lines(vec![" ───────Title┐ ", " ────────────┘ "]),
);
test_case(
Alignment::Right,
Borders::LEFT | Borders::TOP | Borders::BOTTOM,
Buffer::with_lines(vec![" ┌───────Title ", " └──────────── "]),
);
test_case(
Alignment::Right,
Borders::NONE,
Buffer::with_lines(vec![" Title ", " "]),
);
}