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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
*/
use crate::Result;
/// Given a list of keywords for a suggestion, returns a phrase that best
/// completes the user's query. This function uses two heuristics to pick the
/// best match:
///
/// 1. Find the first keyword in the list that has at least one more word than
/// the query, then trim the keyword up to the end of that word.
/// 2. If there isn't a keyword with more words, pick the keyword that forms the
/// longest suffix of the query. This might be the query itself.
pub fn full_keyword(query: &str, keywords: &[impl AsRef<str>]) -> String {
let query_words_len = query.split_whitespace().count();
let min_phrase_words_len = if query.ends_with(char::is_whitespace) {
// If the query ends with a space, find a keyword with at least one more
// word, so that the completed phrase can show a word after the space.
query_words_len + 1
} else {
query_words_len
};
keywords
.iter()
.map(AsRef::as_ref)
.filter(|phrase| phrase.starts_with(query))
.map(|phrase| phrase.split_whitespace().collect::<Vec<_>>())
.find(|phrase_words| phrase_words.len() > min_phrase_words_len)
.map(|phrase_words| phrase_words[..min_phrase_words_len].join(" "))
.unwrap_or_else(|| {
keywords
.iter()
.map(AsRef::as_ref)
.filter(|phrase| phrase.starts_with(query) && query.len() < phrase.len())
.max_by_key(|phrase| phrase.trim().len())
.unwrap_or(query)
.to_owned()
})
}
/// Performs a depth-first traversal over all possible chunk sequences in a
/// string, applies a filter-map function to each chunk in each sequence, and
/// collects the filter-mapped sequences in a `Vec`. A "chunk" is a slice of one
/// or more consecutive words in the string such that the slices do not overlap.
/// It's analogous to the concept of slice chunks described in [1] where the
/// elements in this case are words in a string.
///
/// IMPORTANT: This function potentially does an exponential amount of work! You
/// should always be careful to prune the traversal space by returning `None`
/// from your mappper function, as described further below, when a chunk does
/// not match what you are searching for.
///
/// `max_chunk_size` controls the maximum chunk size (in number of words), which
/// influences the branching factor at each step in the traversal.
///
/// At each traversal step, the filter-map function is passed the chunk at that
/// step and the chunk's word-based index in the `query` string. The function
/// can map the chunk to one or more values. Each value expands the branching
/// factor at the current step by `max_chunk_size`. In other words, the
/// branching factor at a given traversal step is `max_chunk_size` multiplied by
/// the number of values returned by the filter-map function at that step. The
/// traversed path of mapped values at that step is also passed to the
/// filter-map function. Each path is a sequence of chunks in the original
/// `query` string except the chunks have been replaced by mapped values from
/// the filter-map function.
///
/// The filter-map function can return `None` to halt traversal at the current
/// step. Returning `None` sets the branching factor at that step to zero,
/// pruning the subtree rooted at that step from the traversal space and
/// discarding the path from the output. This is important for keeping traversal
/// reasonably bounded.
///
/// Traversal ends and the function returns when all paths have been visited.
/// The returned `Vec` will contain all traversal paths that weren't pruned.
///
///
/// # Examples
///
/// Mapping chunks in "a b c" to uppercase, up to a max chunk size of `3`:
///
/// ```
/// # use suggest::util::filter_map_chunks;
/// let paths = filter_map_chunks("a b c", 3, |chunk, _, _| {
/// Ok(Some(vec![chunk.to_uppercase()]))
/// });
/// assert_eq!(paths.unwrap(), vec![
/// vec!["A", "B", "C"],
/// vec!["A", "B C"],
/// vec!["A B", "C"],
/// vec!["A B C"]
/// ]);
/// ```
///
/// Same as previous but using `chunk_index` in the filter-map function to prune
/// paths that don't start with `"a"`:
///
/// ```
/// # use suggest::util::filter_map_chunks;
/// let paths = filter_map_chunks("a b c", 3, |chunk, chunk_index, _| {
/// if chunk_index > 0 || chunk == "a" {
/// Ok(Some(vec![chunk.to_uppercase()]))
/// } else {
/// Ok(None)
/// }
/// });
/// assert_eq!(paths.unwrap(), vec![
/// vec!["A", "B", "C"],
/// vec!["A", "B C"],
/// ]);
/// ```
///
/// Same as the first example but using `path` in the filter-map function to
/// prune paths that include "A B":
///
/// ```
/// # use suggest::util::filter_map_chunks;
/// let paths = filter_map_chunks("a b c", 3, |chunk, _, path| {
/// if path.iter().any(|value| value == "A B") {
/// Ok(None)
/// } else {
/// Ok(Some(vec![chunk.to_uppercase()]))
/// }
/// });
/// assert_eq!(paths.unwrap(), vec![
/// vec!["A", "B", "C"],
/// vec!["A", "B C"],
/// vec!["A B C"],
/// ]);
/// ```
///
/// Mapping each chunk to multiple values:
///
/// ```
/// # use suggest::util::filter_map_chunks;
/// let paths = filter_map_chunks("a b c", 3, |chunk, _, _| {
/// Ok(Some(vec![format!("{chunk}0"), format!("{chunk}1")]))
/// });
/// assert_eq!(paths.unwrap(), vec![
/// vec!["a0", "b0", "c0"],
/// vec!["a0", "b0", "c1"],
/// vec!["a0", "b1", "c0"],
/// vec!["a0", "b1", "c1"],
/// vec!["a0", "b c0"],
/// vec!["a0", "b c1"],
/// vec!["a1", "b0", "c0"],
/// vec!["a1", "b0", "c1"],
/// vec!["a1", "b1", "c0"],
/// vec!["a1", "b1", "c1"],
/// vec!["a1", "b c0"],
/// vec!["a1", "b c1"],
/// vec!["a b0", "c0"],
/// vec!["a b0", "c1"],
/// vec!["a b1", "c0"],
/// vec!["a b1", "c1"],
/// vec!["a b c0"],
/// vec!["a b c1"]
/// ]);
/// ```
pub fn filter_map_chunks<T: Clone>(
query: &str,
max_chunk_size: usize,
f: impl Fn(&str, usize, &[T]) -> Result<Option<Vec<T>>>,
) -> Result<Vec<Vec<T>>> {
let words: Vec<_> = query.split_whitespace().collect();
let normalized_query = words.join(" ");
filter_map_chunks_recurse(
&words,
&normalized_query,
&mut vec![],
0,
max_chunk_size,
&f,
)
}
/// `remaining_words` is the slice of remaining words in the query string at
/// this step. `remaining_query` is the remaining slice of the normalized query
/// string at this step.
///
/// `path` is the sequence of values returned by the filter-map function so far
/// at this step.
///
/// `chunk_index` is the word-based index in the query string at this step.
fn filter_map_chunks_recurse<T: Clone>(
remaining_words: &[&str],
remaining_query: &str,
path: &mut Vec<T>,
chunk_index: usize,
max_chunk_size: usize,
f: &impl Fn(&str, usize, &[T]) -> Result<Option<Vec<T>>>,
) -> Result<Vec<Vec<T>>> {
// Filtered-in (non-pruned) paths that will be returned from this step of
// the traversal.
let mut this_step_paths: Vec<Vec<T>> = vec![];
for chunk_size in 1..=max_chunk_size {
if remaining_words.len() < chunk_size {
// `chunk_size` and the later chunk sizes in this for-loop are too
// big to visit the remaining words. We already visited them earlier
// in the loop when the chunk size was small enough.
break;
}
// Get the current chunk within the remaining query. Its char length is
// the sum of the lengths of the words in the chunk + `chunk_size - 1`
// spaces between the words. There will only be one space between each
// word in `remaining_query` because `remaining_query` is normalized.
let chunk_char_len = remaining_words[..chunk_size]
.iter()
.fold(chunk_size - 1, |memo, w| memo + w.len());
let chunk = &remaining_query[..chunk_char_len];
// Call the mapper function.
if let Some(mapped_values) = f(chunk, chunk_index, &path[..])? {
for value in mapped_values {
if chunk_size == remaining_words.len() {
// This is the final chunk in the path. Stop recursing.
this_step_paths.push(vec![value.clone()]);
} else {
// Recurse. Note that the new `remaining_words` slice won't
// be empty because if it were, `chunk_size` would equal the
// remaining word count, which is if-branch condition.
path.push(value.clone());
let subtree_paths = filter_map_chunks_recurse(
&remaining_words[chunk_size..],
&remaining_query[(chunk_char_len + 1)..],
path,
chunk_index + chunk_size,
max_chunk_size,
f,
)?;
path.pop();
for mut p in subtree_paths {
p.insert(0, value.clone());
this_step_paths.push(p);
}
}
}
}
}
Ok(this_step_paths)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn keywords_with_more_words() {
assert_eq!(
full_keyword(
"moz",
&[
"moz",
"mozi",
"mozil",
"mozill",
"mozilla",
"mozilla firefox"
]
),
"mozilla".to_owned(),
);
assert_eq!(
full_keyword(
"mozilla",
&[
"moz",
"mozi",
"mozil",
"mozill",
"mozilla",
"mozilla firefox"
]
),
"mozilla".to_owned(),
);
}
#[test]
fn keywords_with_longer_phrase() {
assert_eq!(
full_keyword("moz", &["moz", "mozi", "mozil", "mozill", "mozilla"]),
"mozilla".to_owned()
);
assert_eq!(
full_keyword(
"mozilla f",
&["moz", "mozi", "mozil", "mozill", "mozilla firefox"]
),
"mozilla firefox".to_owned()
);
}
#[test]
fn query_ends_with_space() {
assert_eq!(
full_keyword(
"mozilla ",
&["moz", "mozi", "mozil", "mozill", "mozilla firefox"]
),
"mozilla firefox".to_owned()
);
}
fn check_paths(actual: Vec<Vec<(String, usize)>>, expected: Vec<Vec<(&str, usize)>>) {
assert_eq!(
actual,
expected
.into_iter()
.map(|p| p
.into_iter()
.map(|(w, i)| (w.to_string(), i))
.collect::<Vec<_>>())
.collect::<Vec<Vec<_>>>()
);
}
#[test]
fn filter_map_chunks_1() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 1, |chunk, chunk_index, _| {
Ok(Some(vec![(chunk.to_string(), chunk_index)]))
})?;
check_paths(
paths,
vec![vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)]],
);
Ok(())
}
#[test]
fn filter_map_chunks_2() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| {
Ok(Some(vec![(chunk.to_string(), chunk_index)]))
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| {
Ok(Some(vec![(chunk.to_string(), chunk_index)]))
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| {
Ok(Some(vec![(chunk.to_string(), chunk_index)]))
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_5() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 5, |chunk, chunk_index, _| {
Ok(Some(vec![(chunk.to_string(), chunk_index)]))
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
vec![("a b c d e", 0)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_1_map_many() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c", 1, |chunk, _, _| {
Ok(Some((0..3).map(|i| format!("{chunk}{i}")).collect()))
})?;
assert_eq!(
paths,
vec![
vec!["a0", "b0", "c0"],
vec!["a0", "b0", "c1"],
vec!["a0", "b0", "c2"],
vec!["a0", "b1", "c0"],
vec!["a0", "b1", "c1"],
vec!["a0", "b1", "c2"],
vec!["a0", "b2", "c0"],
vec!["a0", "b2", "c1"],
vec!["a0", "b2", "c2"],
vec!["a1", "b0", "c0"],
vec!["a1", "b0", "c1"],
vec!["a1", "b0", "c2"],
vec!["a1", "b1", "c0"],
vec!["a1", "b1", "c1"],
vec!["a1", "b1", "c2"],
vec!["a1", "b2", "c0"],
vec!["a1", "b2", "c1"],
vec!["a1", "b2", "c2"],
vec!["a2", "b0", "c0"],
vec!["a2", "b0", "c1"],
vec!["a2", "b0", "c2"],
vec!["a2", "b1", "c0"],
vec!["a2", "b1", "c1"],
vec!["a2", "b1", "c2"],
vec!["a2", "b2", "c0"],
vec!["a2", "b2", "c1"],
vec!["a2", "b2", "c2"]
]
);
Ok(())
}
#[test]
fn filter_map_chunks_2_map_many() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c", 2, |chunk, _, _| {
Ok(Some((0..3).map(|i| format!("{chunk}{i}")).collect()))
})?;
assert_eq!(
paths,
vec![
vec!["a0", "b0", "c0"],
vec!["a0", "b0", "c1"],
vec!["a0", "b0", "c2"],
vec!["a0", "b1", "c0"],
vec!["a0", "b1", "c1"],
vec!["a0", "b1", "c2"],
vec!["a0", "b2", "c0"],
vec!["a0", "b2", "c1"],
vec!["a0", "b2", "c2"],
vec!["a0", "b c0"],
vec!["a0", "b c1"],
vec!["a0", "b c2"],
vec!["a1", "b0", "c0"],
vec!["a1", "b0", "c1"],
vec!["a1", "b0", "c2"],
vec!["a1", "b1", "c0"],
vec!["a1", "b1", "c1"],
vec!["a1", "b1", "c2"],
vec!["a1", "b2", "c0"],
vec!["a1", "b2", "c1"],
vec!["a1", "b2", "c2"],
vec!["a1", "b c0"],
vec!["a1", "b c1"],
vec!["a1", "b c2"],
vec!["a2", "b0", "c0"],
vec!["a2", "b0", "c1"],
vec!["a2", "b0", "c2"],
vec!["a2", "b1", "c0"],
vec!["a2", "b1", "c1"],
vec!["a2", "b1", "c2"],
vec!["a2", "b2", "c0"],
vec!["a2", "b2", "c1"],
vec!["a2", "b2", "c2"],
vec!["a2", "b c0"],
vec!["a2", "b c1"],
vec!["a2", "b c2"],
vec!["a b0", "c0"],
vec!["a b0", "c1"],
vec!["a b0", "c2"],
vec!["a b1", "c0"],
vec!["a b1", "c1"],
vec!["a b1", "c2"],
vec!["a b2", "c0"],
vec!["a b2", "c1"],
vec!["a b2", "c2"]
]
);
Ok(())
}
#[test]
fn filter_map_chunks_1_prune_a() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 1, |chunk, chunk_index, _| match chunk {
"a" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(paths, vec![]);
Ok(())
}
#[test]
fn filter_map_chunks_1_prune_b() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 1, |chunk, chunk_index, _| match chunk {
"b" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(paths, vec![]);
Ok(())
}
#[test]
fn filter_map_chunks_1_prune_c() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 1, |chunk, chunk_index, _| match chunk {
"c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(paths, vec![]);
Ok(())
}
#[test]
fn filter_map_chunks_1_prune_d() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 1, |chunk, chunk_index, _| match chunk {
"d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(paths, vec![]);
Ok(())
}
#[test]
fn filter_map_chunks_1_prune_e() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 1, |chunk, chunk_index, _| match chunk {
"e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(paths, vec![]);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_a() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"a" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_b() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"b" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_c() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_d() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_e() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_ab() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"a b" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_bc() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"b c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_cd() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"c d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_de() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_a_bc() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"a" | "b c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_a_cd() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"a" | "c d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_bc_cd() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"b c" | "c d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_2_prune_bc_de() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 2, |chunk, chunk_index, _| match chunk {
"b c" | "d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_a() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"a" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_b() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"b" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_c() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_d() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_e() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_ab() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"a b" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_bc() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"b c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_cd() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"c d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_de() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_abc() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"a b c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_bcd() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"b c d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_cde() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"c d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_3_prune_a_bc_cde() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 3, |chunk, chunk_index, _| match chunk {
"a" | "b c" | "c d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_a() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"a" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_b() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"b" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_c() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_d() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_e() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_ab() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"a b" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_bc() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"b c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_cd() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"c d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_de() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_abc() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"a b c" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_bcd() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"b c d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_cde() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"c d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_abcd() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"a b c d" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a", 0), ("b c d e", 1)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_bcde() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"b c d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b", 1), ("c d e", 2)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a", 0), ("b c d", 1), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_a_bc_de() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"a" | "b c" | "d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b", 0), ("c d e", 2)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_4_prune_a_bc_cde() -> anyhow::Result<()> {
let paths = filter_map_chunks("a b c d e", 4, |chunk, chunk_index, _| match chunk {
"a" | "b c" | "c d e" => Ok(None),
_ => Ok(Some(vec![(chunk.to_string(), chunk_index)])),
})?;
check_paths(
paths,
vec![
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
vec![("a b c", 0), ("d", 3), ("e", 4)],
vec![("a b c", 0), ("d e", 3)],
vec![("a b c d", 0), ("e", 4)],
],
);
Ok(())
}
#[test]
fn filter_map_chunks_spaces() -> anyhow::Result<()> {
let paths = filter_map_chunks(" a b c d e ", 2, |chunk, chunk_index, _| {
Ok(Some(vec![(chunk.to_string(), chunk_index)]))
})?;
check_paths(
paths,
vec![
vec![("a", 0), ("b", 1), ("c", 2), ("d", 3), ("e", 4)],
vec![("a", 0), ("b", 1), ("c", 2), ("d e", 3)],
vec![("a", 0), ("b", 1), ("c d", 2), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d", 3), ("e", 4)],
vec![("a", 0), ("b c", 1), ("d e", 3)],
vec![("a b", 0), ("c", 2), ("d", 3), ("e", 4)],
vec![("a b", 0), ("c", 2), ("d e", 3)],
vec![("a b", 0), ("c d", 2), ("e", 4)],
],
);
Ok(())
}
}