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use crate::show_commit::diff_line::DiffLine;
#[derive(Debug, Clone)]
#[cfg_attr(test, derive(PartialEq))]
pub struct Delta {
old_start: u32,
old_lines: u32,
new_start: u32,
new_lines: u32,
context: String,
lines: Vec<DiffLine>,
}
impl Delta {
pub(super) fn new(header: &str, old_start: u32, new_start: u32, old_lines: u32, new_lines: u32) -> Self {
let context = header.splitn(3, '@').nth(2).unwrap_or("").trim();
Self {
old_start,
old_lines,
new_start,
new_lines,
context: String::from(context),
lines: vec![],
}
}
pub(crate) fn add_line(&mut self, diff_line: DiffLine) {
self.lines.push(diff_line);
}
pub(crate) fn context(&self) -> &str {
self.context.as_str()
}
pub(crate) const fn lines(&self) -> &Vec<DiffLine> {
&self.lines
}
pub(crate) const fn old_start(&self) -> u32 {
self.old_start
}
pub(crate) const fn old_lines(&self) -> u32 {
self.old_lines
}
pub(crate) const fn new_start(&self) -> u32 {
self.new_start
}
pub(crate) const fn new_lines(&self) -> u32 {
self.new_lines
}
}
#[cfg(test)]
mod tests {
use super::super::origin::Origin;
use super::*;
#[test]
fn new_with_correctly_formatted_context() {
let delta = Delta::new("@ src/show_commit/delta.rs:56 @ impl Delta {", 10, 12, 3, 4);
assert_eq!(delta.context(), "impl Delta {");
assert_eq!(delta.old_start(), 10);
assert_eq!(delta.new_start(), 12);
assert_eq!(delta.old_lines(), 3);
assert_eq!(delta.new_lines(), 4);
}
#[test]
fn new_with_at_symbol_in_context() {
let delta = Delta::new("@ path:1 @ Context@", 10, 12, 3, 4);
assert_eq!(delta.context(), "Context@");
assert_eq!(delta.old_start(), 10);
assert_eq!(delta.new_start(), 12);
assert_eq!(delta.old_lines(), 3);
assert_eq!(delta.new_lines(), 4);
}
#[test]
fn new_with_incorrectly_formatted_context() {
let delta = Delta::new("@invalid", 10, 12, 3, 4);
assert_eq!(delta.context(), "");
assert_eq!(delta.old_start(), 10);
assert_eq!(delta.new_start(), 12);
assert_eq!(delta.old_lines(), 3);
assert_eq!(delta.new_lines(), 4);
}
#[test]
fn add_line() {
let mut delta = Delta::new("@ src/show_commit/delta.rs:56 @ impl Delta {", 10, 12, 3, 4);
delta.add_line(DiffLine::new(
Origin::Addition,
"this is a line",
Some(10),
Some(12),
false,
));
assert_eq!(delta.lines().len(), 1);
}
}
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