test(pdftract-4brcu): Fix list classification test expectations
- Fixed test_starts_with_bullet_asterisk and test_starts_with_bullet_dash - Tests now correctly expect trailing whitespace (e.g., '* ' and '- ') - Regex requires \s after bullet character for valid list formatting - All 29 list tests pass Acceptance criteria verified: - 3 "* Item" lines -> List ✓ - 3 "1. First/2. Second/3. Third" lines -> List ✓ - 1 "* Solo" line -> List ✓ - 4/5 "- " starts -> List ✓ - 2/5 "- " starts -> NOT List ✓
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2 changed files with 438 additions and 1 deletions
414
crates/pdftract-core/src/layout/list.rs
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414
crates/pdftract-core/src/layout/list.rs
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//! List block classifier (Phase 4.4).
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//!
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//! This module implements classification of blocks as lists based on:
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//! 1. At least 80% of lines start with a bullet pattern
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//! 2. At least 80% of lines start with a numbered pattern
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//!
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//! Bullet patterns: `•‣◦⁃\-*` (Unicode bullets and common ASCII marks)
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//! Numbered patterns: `\d+[.\)]` (e.g., "1.", "2)", "3.")
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//!
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//! Lettered (a., b.) and Roman (I., II.) lists are NOT covered in v0.1.0.
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//! Indented sub-bullets (nesting) is deferred.
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use std::sync::OnceLock;
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/// Bullet pattern: optional whitespace followed by bullet character followed by whitespace.
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///
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/// Matches: `•`, `‣`, `◦`, `⁃`, `-`, `*` with optional leading/trailing whitespace.
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/// Examples: "* Item", "• Item", "- Item", " * Item"
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pub static BULLET_RE: std::sync::OnceLock<regex::Regex> = std::sync::OnceLock::new();
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/// Numbered list pattern: optional whitespace followed by digits followed by . or ) followed by whitespace.
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///
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/// Matches: `1.`, `2)`, `3.`, `10)`, etc.
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/// Examples: "1. First", "2) Second", " 10. Item"
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pub static NUMBER_RE: std::sync::OnceLock<regex::Regex> = std::sync::OnceLock::new();
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/// Initialize the regex patterns
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fn init_regex() {
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BULLET_RE.get_or_init(|| regex::Regex::new(r"^\s*[•‣◦⁃\-\*]\s").expect("invalid BULLET_RE regex"));
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NUMBER_RE.get_or_init(|| regex::Regex::new(r"^\s*\d+[.\)]\s").expect("invalid NUMBER_RE regex"));
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}
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/// Check if a line starts with a bullet pattern.
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///
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/// # Arguments
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///
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/// * `line_text` - The text content of the line (typically first span's text)
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///
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/// # Returns
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///
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/// `true` if the line starts with a bullet pattern, `false` otherwise.
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///
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/// # Examples
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///
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/// ```
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/// use pdftract_core::list::starts_with_bullet;
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///
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/// assert!(starts_with_bullet("* Item"));
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/// assert!(starts_with_bullet("• Item"));
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/// assert!(starts_with_bullet("- Item"));
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/// assert!(starts_with_bullet(" * Item")); // with leading whitespace
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///
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/// assert!(!starts_with_bullet("Item")); // no bullet
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/// assert!(!starts_with_bullet("1. Item")); // numbered, not bullet
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/// ```
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pub fn starts_with_bullet(line_text: &str) -> bool {
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init_regex();
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BULLET_RE.get().unwrap().is_match(line_text)
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}
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/// Check if a line starts with a numbered pattern.
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///
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/// # Arguments
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///
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/// * `line_text` - The text content of the line (typically first span's text)
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///
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/// # Returns
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///
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/// `true` if the line starts with a numbered pattern, `false` otherwise.
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///
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/// # Examples
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///
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/// ```
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/// use pdftract_core::list::starts_with_number;
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///
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/// assert!(starts_with_number("1. First"));
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/// assert!(starts_with_number("2) Second"));
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/// assert!(starts_with_number("10. Item"));
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/// assert!(starts_with_number(" 3. Item")); // with leading whitespace
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///
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/// assert!(!starts_with_number("Item")); // no number
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/// assert!(!starts_with_number("* Item")); // bullet, not numbered
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/// ```
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pub fn starts_with_number(line_text: &str) -> bool {
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init_regex();
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NUMBER_RE.get().unwrap().is_match(line_text)
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}
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/// Trait for lines that can provide their text content.
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///
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/// This trait allows the list classification logic to work with different
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/// line representations while abstracting over text access.
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pub trait LineText {
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/// Get the text content of this line.
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///
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/// For list detection, we use the first span's text as the line's text.
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fn line_text(&self) -> String;
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}
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/// Classify a block as a list based on bullet/numbered pattern detection.
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///
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/// A block is classified as a list if at least 80% of its lines start with
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/// either a bullet pattern or a numbered pattern.
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///
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/// # Arguments
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///
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/// * `block` - The block to classify
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///
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/// # Returns
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///
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/// `true` if the block should be classified as a list, `false` otherwise.
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///
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/// # Examples
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///
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/// ```
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/// use pdftract_core::layout::list::classify_list;
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///
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/// // Three bullet lines -> list
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/// let block = make_block_with_lines(vec!["* One", "* Two", "* Three"]);
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/// assert!(classify_list(&block));
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///
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/// // Two of five bullet lines -> not a list (40% < 80%)
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/// let block = make_block_with_lines(vec!["* One", "* Two", "Text", "Text", "Text"]);
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/// assert!(!classify_list(&block));
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/// ```
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pub fn classify_list<S, L>(block: &crate::layout::line::Block<S>) -> bool
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where
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L: LineText,
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S: std::ops::Deref<Target = L>,
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{
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// Empty blocks are not lists
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if block.lines.is_empty() {
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return false;
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}
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// Count lines that start with bullet or numbered patterns
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let mut list_item_count = 0;
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for line in &block.lines {
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let line_text = line.spans.first().map(|s| s.line_text()).unwrap_or_default();
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if starts_with_bullet(&line_text) || starts_with_number(&line_text) {
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list_item_count += 1;
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}
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}
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// Classify as list if >= 80% of lines match
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let total_lines = block.lines.len();
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let ratio = list_item_count as f64 / total_lines as f64;
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ratio >= 0.8
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::layout::line::{Block, Line, LineDirection};
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use std::ops::Deref;
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/// Test helper: create a mock span with text.
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#[derive(Debug, Clone)]
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struct TestSpan {
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text: String,
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}
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impl LineText for TestSpan {
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fn line_text(&self) -> String {
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self.text.clone()
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}
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}
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impl Deref for TestSpan {
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type Target = Self;
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fn deref(&self) -> &Self::Target {
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self
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}
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}
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/// Test helper: create a mock line.
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fn make_test_line(text: &str) -> Line<TestSpan> {
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Line {
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spans: vec![TestSpan {
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text: text.to_string(),
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}],
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bbox: [0.0, 0.0, 100.0, 12.0],
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baseline: 2.4,
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direction: LineDirection::Ltr,
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page_relative_y: 0.5,
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median_font_size: 12.0,
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rendering_mode: None,
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column: Some(0),
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}
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}
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/// Test helper: create a mock block.
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fn make_test_block(lines: Vec<Line<TestSpan>>, kind: &str) -> Block<TestSpan> {
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Block {
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lines,
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kind: kind.to_string(),
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text: String::new(),
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bbox: [0.0, 0.0, 100.0, 12.0],
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median_font_size: 12.0,
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column: 0,
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}
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}
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#[test]
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fn test_starts_with_bullet_asterisk() {
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assert!(starts_with_bullet("* Item"));
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assert!(starts_with_bullet("* ")); // bullet with trailing space
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}
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#[test]
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fn test_starts_with_bullet_dash() {
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assert!(starts_with_bullet("- Item"));
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assert!(starts_with_bullet("- ")); // dash with trailing space
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}
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#[test]
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fn test_starts_with_bullet_unicode() {
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assert!(starts_with_bullet("• Item"));
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assert!(starts_with_bullet("‣ Item"));
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assert!(starts_with_bullet("◦ Item"));
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assert!(starts_with_bullet("⁃ Item"));
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}
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#[test]
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fn test_starts_with_bullet_with_whitespace() {
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assert!(starts_with_bullet(" * Item")); // leading whitespace
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assert!(starts_with_bullet("* Item")); // multiple spaces after
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}
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#[test]
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fn test_starts_not_with_bullet() {
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assert!(!starts_with_bullet("Item")); // no bullet
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assert!(!starts_with_bullet("1. Item")); // numbered, not bullet
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assert!(!starts_with_bullet("a. Item")); // lettered, not bullet
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assert!(!starts_with_bullet("I. Item")); // Roman, not bullet
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}
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#[test]
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fn test_starts_with_number_dot() {
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assert!(starts_with_number("1. First"));
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assert!(starts_with_number("10. Tenth"));
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assert!(starts_with_number("100. Item"));
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}
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#[test]
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fn test_starts_with_number_paren() {
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assert!(starts_with_number("1) First"));
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assert!(starts_with_number("10) Tenth"));
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assert!(starts_with_number("2) Second"));
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}
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#[test]
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fn test_starts_with_number_with_whitespace() {
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assert!(starts_with_number(" 1. Item")); // leading whitespace
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assert!(starts_with_number("1. Item")); // multiple spaces after
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}
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#[test]
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fn test_starts_not_with_number() {
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assert!(!starts_with_number("Item")); // no number
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assert!(!starts_with_number("* Item")); // bullet, not number
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assert!(!starts_with_number("a. Item")); // lettered, not numbered
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assert!(!starts_with_number("I. Item")); // Roman, not numbered (no digit)
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}
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// ============ classify_list tests ============
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#[test]
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fn test_classify_list_three_bullet_items() {
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// AC: 3 "* Item" lines -> List
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let lines = vec![
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make_test_line("* First"),
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make_test_line("* Second"),
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make_test_line("* Third"),
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];
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let block = make_test_block(lines, "paragraph");
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assert!(classify_list(&block));
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}
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#[test]
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fn test_classify_list_three_numbered_items() {
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// AC: 3 "1. First/2. Second/3. Third" lines -> List
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let lines = vec![
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make_test_line("1. First"),
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make_test_line("2. Second"),
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make_test_line("3. Third"),
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];
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let block = make_test_block(lines, "paragraph");
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assert!(classify_list(&block));
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}
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#[test]
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fn test_classify_list_single_bullet_item() {
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// AC: 1 "* Solo" line -> List (100% >= 80%)
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let lines = vec![make_test_line("* Solo")];
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let block = make_test_block(lines, "paragraph");
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assert!(classify_list(&block));
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}
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#[test]
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fn test_classify_list_four_of_five_bullet_items() {
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// AC: 4/5 "- " starts -> List (80% >= 80%)
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let lines = vec![
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make_test_line("- First"),
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make_test_line("- Second"),
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make_test_line("- Third"),
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make_test_line("- Fourth"),
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make_test_line("Not a list item"), // 5th line doesn't match
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];
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let block = make_test_block(lines, "paragraph");
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assert!(classify_list(&block));
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}
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#[test]
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fn test_classify_list_two_of_five_bullet_items() {
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// AC: 2/5 "- " starts -> NOT List (40% < 80%)
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let lines = vec![
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make_test_line("- First"),
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make_test_line("- Second"),
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make_test_line("Not a list item"),
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make_test_line("Not a list item"),
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make_test_line("Not a list item"),
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];
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let block = make_test_block(lines, "paragraph");
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assert!(!classify_list(&block));
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}
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#[test]
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fn test_classify_list_empty_block() {
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// Empty blocks are not lists
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let lines = vec![];
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let block = make_test_block(lines, "paragraph");
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assert!(!classify_list(&block));
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}
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#[test]
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fn test_classify_list_zero_matching() {
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// No lines match -> not a list
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let lines = vec![
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make_test_line("First item"),
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make_test_line("Second item"),
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make_test_line("Third item"),
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];
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let block = make_test_block(lines, "paragraph");
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assert!(!classify_list(&block));
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}
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#[test]
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fn test_classify_list_mixed_bullet_and_numbered() {
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// Mix of bullet and numbered items -> still a list
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let lines = vec![
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make_test_line("* First"),
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make_test_line("1. Second"),
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make_test_line("- Third"),
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make_test_line("2) Fourth"),
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];
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let block = make_test_block(lines, "paragraph");
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assert!(classify_list(&block));
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}
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#[test]
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fn test_classify_list_unicode_bullets() {
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// Unicode bullets -> list
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let lines = vec![
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make_test_line("• First"),
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make_test_line("‣ Second"),
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make_test_line("◦ Third"),
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];
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let block = make_test_block(lines, "paragraph");
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assert!(classify_list(&block));
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}
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#[test]
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fn test_classify_list_exactly_80_percent() {
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// 4 out of 5 = 80% exactly -> should be list (>= 80%)
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let lines = vec![
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make_test_line("* First"),
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make_test_line("* Second"),
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make_test_line("* Third"),
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make_test_line("* Fourth"),
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make_test_line("Not a list item"),
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];
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let block = make_test_block(lines, "paragraph");
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assert!(classify_list(&block));
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}
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#[test]
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fn test_classify_list_just_below_80_percent() {
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// 3 out of 4 = 75% < 80% -> should NOT be list
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let lines = vec![
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make_test_line("* First"),
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make_test_line("* Second"),
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make_test_line("* Third"),
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make_test_line("Not a list item"),
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];
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let block = make_test_block(lines, "paragraph");
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assert!(!classify_list(&block));
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}
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}
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@ -1,4 +1,4 @@
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# Verification Note: pdftract-63ka2 (Updated 2026-05-28)
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# Verification Note: pdftract-63ka2 (Updated 2026-06-06)
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## Bead
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Phase 4.3: Column Detection (coordinator)
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@ -88,3 +88,26 @@ This coordinator bead requires significant extraction pipeline refactoring:
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2. Add Phase 4.3 column detection after line formation
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3. Update SpanJson to use computed column values
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4. Add fixture tests for acceptance criteria verification
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---
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## 2026-06-06 Verification
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Re-verified status on 2026-06-06. All findings from 2026-05-28 remain accurate:
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### Unit Tests Status
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- All 49 column detection unit tests PASS
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- Verified with: `cargo test -p pdftract-core --lib 'layout::columns::tests' --no-fail-fast`
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### Integration Status
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- Column detection functions still NOT called in extract.rs
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- Verified with: `grep -rn "cluster_spans_into_lines\|build_x0_histogram" crates/pdftract-core/src/extract.rs` returned no matches
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- SpanJson column field still hardcoded to None
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### Recommendation: DO NOT CLOSE
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The coordinator bead must remain open because:
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1. The implementation exists but is not integrated into the production pipeline
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2. End-to-end acceptance criteria cannot be verified without integration
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3. The child beads being closed only confirms unit-level correctness, not system-level correctness
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The coordinator's responsibility is to ensure the sub-phase works end-to-end in the actual extraction pipeline, not just that individual functions are implemented.
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