use anyhow::Result;
use crate::db::test_support::ScopedTestDataDir;
use crate::memory::preference::render_preferences_with_context_details;
use super::{insert_preference_row, setup_test_db};
#[test]
fn preference_details_preserve_every_canonical_selection_drop_reason() -> Result<()> {
let cwd = ScopedTestDataDir::new("preference-selection-audit");
std::fs::create_dir_all(&cwd.path)?;
std::fs::write(cwd.path.join("CLAUDE.md"), "Use Chinese comments\n")?;
let conn = setup_test_db();
insert_preference_row(
&conn,
1,
"test/proj",
Some("claude-dedup"),
"Preference: Use Chinese comments",
"Use Chinese comments in code",
"project",
)?;
insert_preference_row(
&conn,
2,
"test/proj",
Some("format-duplicate"),
"Preference: Format validation",
"Always run cargo fmt before checks.",
"project",
)?;
insert_preference_row(
&conn,
3,
"test/proj",
Some("docs"),
"Preference: Keep docs current",
"Update user documentation whenever behavior changes.",
"project",
)?;
insert_preference_row(
&conn,
4,
"test/proj",
Some("format-primary"),
"Preference: Format first",
"Always run cargo fmt before checks.",
"project",
)?;
let mut output = String::new();
let details = render_preferences_with_context_details(
&mut output,
&conn,
"test/proj",
cwd.path.to_str().expect("utf-8 test path"),
20,
0,
50,
)?;
let reasons = details
.selection_drops
.iter()
.map(|drop| (drop.memory.id, drop.reason))
.collect::<std::collections::BTreeMap<_, _>>();
assert_eq!(details.rendered_ids, vec![4]);
assert_eq!(reasons.get(&1), Some(&"claude_md_dedup"));
assert_eq!(reasons.get(&2), Some(&"preference_similarity_dedup"));
assert_eq!(reasons.get(&3), Some(&"preference_char_limit"));
Ok(())
}