rig-tui 0.45.0

A rig-harness plugin: the terminal view, with panels and tool renderers other plugins add to.
Documentation 
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use super::*;

const EDIT: &str = "Edited a.rs: line 10.
--- a.rs
+++ a.rs
@@ -9,3 +9,3 @@
 fn main() {
-    let last = end + 1;
+    let last = end;
 }
";

#[test]
fn each_line_has_its_numbers_and_its_band() {
    let theme = Theme::on((0, 0, 0), true);
    let Some(lines) = unified_lines(EDIT, &theme) else {
        return;
    };
    let texts: Vec<String> = lines.iter().map(ToString::to_string).collect();
    assert_eq!(
        texts.get(4..).unwrap_or_default(),
        [
            "     9  9   fn main() {",
            "    10    -     let last = end + 1;",
            "       10 +     let last = end;",
            "    11 11   }",
        ]
    );
    // a.rs is Rust: its code is in the terminal's palette.
    let same = lines
        .get(4)
        .map(|line| line.spans.clone())
        .unwrap_or_default();
    assert!(
        same.iter().skip(1).any(|span| span.style.fg.is_some()),
        "{same:?}"
    );
    let bands: Vec<_> = lines.iter().map(|line| line.style.bg).collect();
    assert_eq!(
        bands.get(5..7),
        Some(&[Some(theme.removed), Some(theme.added)][..])
    );
}

#[test]
fn only_the_words_a_line_changed_are_marked() {
    let theme = Theme::on((0, 0, 0), true);
    let lines = unified_lines(EDIT, &theme).unwrap_or_default();
    let marked = |at: usize, shade| {
        let spans = lines
            .get(at)
            .map(|line| line.spans.clone())
            .unwrap_or_default();
        let marked = spans.iter().filter(|span| span.style.bg == Some(shade));
        marked
            .map(|span| span.content.to_string())
            .collect::<String>()
    };
    assert_eq!(marked(5, theme.removed_word), "end + 1;");
    assert_eq!(marked(6, theme.added_word), "end;");
}

#[test]
fn a_removed_line_like_a_file_header_stays_a_removed_line() {
    let diff = "@@ -1,2 +1,1 @@\n--- not a file\n kept\n";
    let lines = unified_lines(diff, &Theme::default()).unwrap_or_default();
    let texts: Vec<String> = lines.iter().map(ToString::to_string).collect();
    assert_eq!(
        texts.get(1).map(String::as_str),
        Some("    1   - -- not a file")
    );
}