Add more unit tests for pos_at_screen_coords.

Specifically, test cases for double-width characters and grapheme
clusters.
pull/539/head
Nathan Vegdahl 3 years ago
parent eec5631140
commit ccecda4f66

@ -245,76 +245,117 @@ impl View {
mod tests {
use super::*;
use helix_core::Rope;
const OFFSET: u16 = 7; // 1 diagnostic + 5 linenr + 1 gutter
#[test]
fn test_text_pos_at_screen_coords() {
let mut view = View::new(DocumentId::default());
view.area = Rect::new(40, 40, 40, 40);
let text = Rope::from_str("abc\n\tdef");
let rope = Rope::from_str("abc\n\tdef");
let text = rope.slice(..);
assert_eq!(view.text_pos_at_screen_coords(&text, 40, 2, 4), None);
assert_eq!(view.text_pos_at_screen_coords(&text, 40, 41, 4), None);
assert_eq!(view.text_pos_at_screen_coords(&text, 0, 2, 4), None);
assert_eq!(view.text_pos_at_screen_coords(&text, 0, 49, 4), None);
assert_eq!(view.text_pos_at_screen_coords(&text, 0, 41, 4), None);
assert_eq!(view.text_pos_at_screen_coords(&text, 40, 81, 4), None);
assert_eq!(view.text_pos_at_screen_coords(&text, 78, 41, 4), None);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 40, 2, 4),
None
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 3, 4),
Some(3)
);
assert_eq!(view.text_pos_at_screen_coords(&text, 40, 80, 4), Some(3));
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 40, 41, 4),
None
view.text_pos_at_screen_coords(&text, 41, 40 + OFFSET + 1, 4),
Some(5)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 0, 2, 4),
None
view.text_pos_at_screen_coords(&text, 41, 40 + OFFSET + 4, 4),
Some(5)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 0, 49, 4),
None
view.text_pos_at_screen_coords(&text, 41, 40 + OFFSET + 7, 4),
Some(8)
);
assert_eq!(view.text_pos_at_screen_coords(&text, 41, 80, 4), Some(8));
}
#[test]
fn test_text_pos_at_screen_coords_cjk() {
let mut view = View::new(DocumentId::default());
view.area = Rect::new(40, 40, 40, 40);
let rope = Rope::from_str("Hi! こんにちは皆さん");
let text = rope.slice(..);
assert_eq!(
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 0, 4),
Some(0)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 0, 41, 4),
None
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 5, 4),
Some(5)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 40, 81, 4),
None
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 6, 4),
Some(5)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 78, 41, 4),
None
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 7, 4),
Some(6)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 40, 40 + 7 + 3, 4),
Some(3)
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 8, 4),
Some(6)
);
}
#[test]
fn test_text_pos_at_screen_coords_graphemes() {
let mut view = View::new(DocumentId::default());
view.area = Rect::new(40, 40, 40, 40);
let rope = Rope::from_str("Hèl̀l̀ò world!");
let text = rope.slice(..);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 40, 80, 4),
Some(3)
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 0, 4),
Some(0)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 41, 40 + 7 + 1, 4),
Some(5)
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 1, 4),
Some(1)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 41, 40 + 7 + 4, 4),
Some(5)
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 2, 4),
Some(3)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 41, 40 + 7 + 7, 4),
Some(8)
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 3, 4),
Some(5)
);
assert_eq!(
view.text_pos_at_screen_coords(&text.slice(..), 41, 80, 4),
Some(8)
view.text_pos_at_screen_coords(&text, 40, 40 + OFFSET + 4, 4),
Some(7)
);
}
}

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