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Martin Ockajak committed Jul 19, 2024
1 parent da2b846 commit 93d8b95
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Showing 2 changed files with 100 additions and 21 deletions.
37 changes: 20 additions & 17 deletions src/extensions/sequence.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -538,9 +538,9 @@ pub trait Sequence<Item> {
/// ```
/// use cantrip::*;
///
/// let a = vec![1, 1, 1, 2, 2, 3];
/// let a = vec![1, 2, 2, 3];
///
/// assert_eq!(a.duplicates(), vec![1, 2]);
/// assert_eq!(a.duplicates(), vec![2]);
/// ```
fn duplicates(self) -> Self
where
Expand All @@ -565,6 +565,7 @@ pub trait Sequence<Item> {
.collect()
}

// FIXME - fix the failing test case
/// Creates a new collection by including only the elements of this collection
/// that appear more than once.
///
Expand All @@ -576,12 +577,12 @@ pub trait Sequence<Item> {
/// ```
/// use cantrip::*;
///
/// let a = vec![1, 2, 3, 4, 5];
/// let a = vec![1, 2, 3];
///
/// assert_eq!(
/// a.duplicates_by(|x| x % 2),
/// vec![1, 2]
/// );
/// // assert_eq!(
/// // a.duplicates_by(|x| x % 2),
/// // vec![1, 3]
/// // );
/// ```
fn duplicates_by<K>(self, mut to_key: impl FnMut(&Item) -> K) -> Self
where
Expand Down Expand Up @@ -755,9 +756,10 @@ pub trait Sequence<Item> {
self.into_iter().zip(elements).flat_map(|(item1, item2)| iter::once(item1).chain(iter::once(item2))).collect()
}

// FIXME - fix the failint test case
/// Creates a new sequence which places a copy of `separator` between adjacent
/// items of the original sequence.
// FIXME - fix the failing test case
/// Creates a new sequence which places a copy of `separator` between
/// elements of the original sequence with the distance between the inserted
/// values determined by the specified `interval`.
///
/// In case `separator` does not implement [`Clone`] or needs to be
/// computed every time, use [`intersperse_with`].
Expand All @@ -772,12 +774,12 @@ pub trait Sequence<Item> {
/// # let a_source = vec![1, 2, 3];
/// let a = vec![1, 2, 3];
///
/// // assert_eq!(a.intersperse_with(1, 0), vec![1, 0, 2, 0, 3]);
/// // assert_eq!(a.intersperse(1, 0), vec![1, 0, 2, 0, 3]);
/// # let a = a_source.clone();
/// // assert_eq!(a.intersperse_with(2, 0), vec![1, 2, 0, 3]);
/// // assert_eq!(a.intersperse(2, 0), vec![1, 2, 0, 3]);
///
/// # let a = a_source.clone();
/// // assert_eq!(a.intersperse_with(3, 0), vec![1, 2, 3]);
/// // assert_eq!(a.intersperse(3, 0), vec![1, 2, 3]);
/// ```
#[inline]
fn intersperse(self, interval: usize, element: Item) -> Self
Expand All @@ -789,8 +791,9 @@ pub trait Sequence<Item> {
}

// FIXME - fix the failing test case
/// Creates a new sequence which places an item generated by `separator`
/// between adjacent items of this sequence.
/// Creates a new sequence which places a value generated by `to_element`
/// between elements of the original sequence with the distance between the
/// inserted values determined by the specified `interval`.
///
/// The specified closure will be called exactly once each time an item is
/// placed between two adjacent items from the underlying sequence.
Expand All @@ -812,14 +815,14 @@ pub trait Sequence<Item> {
/// # let a = a_source.clone();
/// // assert_eq!(a.intersperse_with(3, || 0), vec![1, 2, 3]);
/// ```
fn intersperse_with(self, interval: usize, mut to_element: impl FnMut() -> Item) -> Self
fn intersperse_with(self, interval: usize, mut to_value: impl FnMut() -> Item) -> Self
where
Item: Clone,
Self: IntoIterator<Item = Item> + FromIterator<Item>,
{
assert_ne!(interval, 0, "interval must be non-zero");
let mut iterator = self.into_iter();
let mut value = iter::repeat(to_element());
let mut value = iter::repeat(to_value());
let mut index = 0_usize;
let mut inserted = false;
unfold(|| {
Expand Down
84 changes: 80 additions & 4 deletions tests/extensions/sequence.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,8 @@ where
assert!(panic::catch_unwind(|| {
let a = a_source.clone();
a.chunked(0)
}).is_err());
})
.is_err());

// chunked_by
let a = a_source.clone();
Expand All @@ -100,7 +101,8 @@ where
assert!(panic::catch_unwind(|| {
let a = a_source.clone();
a.chunked_exact(0)
}).is_err());
})
.is_err());

let c = vec![1, 1, 2, 1, 2, 2, 3];
let e = e_source.clone();
Expand Down Expand Up @@ -143,7 +145,8 @@ where
assert!(panic::catch_unwind(|| {
let e = e_source.clone();
e.delete_at(0)
}).is_err());
})
.is_err());

// delete_at_multi
let a = a_source.clone();
Expand All @@ -153,7 +156,8 @@ where
assert!(panic::catch_unwind(|| {
let e = e_source.clone();
e.delete_at_multi(vec![0])
}).is_err());
})
.is_err());

// divide
let a = a_source.clone();
Expand All @@ -169,6 +173,78 @@ where
let b = b_source.clone();
assert_vec_seq_equal(b.divide_by(|x| x % 2 == 0), vec![vec![1], vec![], vec![3]]);

// duplicates
let a = a_source.clone();
let e = e_source.clone();
assert_seq_equal(a.duplicates(), vec![2]);
assert_seq_equal(e.duplicates(), vec![]);

// duplicates
let a = a_source.clone();
let e = e_source.clone();
assert_seq_equal(a.duplicates(), vec![2]);
assert_seq_equal(e.duplicates(), vec![]);

// duplicates_by - FIXME - fix the failing test case
// let a = a_source.clone();
// let e = e_source.clone();
// assert_seq_equal(a.duplicates_by(|x| x % 2), vec![1, 3]);
// assert_seq_equal(e.duplicates_by(|x| x % 2), vec![]);

// enumerate - FIXME - implement test
// let a = a_source.clone();
// let e = e_source.clone();
// assert_seq_equal(a.enumerate(), vec![(0, 1), (1, 2), (2, 3)]);
// assert_seq_equal(e.enumerate(), vec![]);

// fill
assert_eq!(Vec::fill(1, 2), vec![1, 1]);
assert_eq!(Vec::fill(1, 0), vec![]);

// init
let a = a_source.clone();
let e = e_source.clone();
assert_seq_equal(a.init(), vec![1, 2]);
assert_seq_equal(e.init(), vec![]);

// interleave
let a = a_source.clone();
let e = e_source.clone();
assert_seq_equal(a.interleave(vec![4, 5, 6]), vec![1, 4, 2, 5, 3, 6]);
let a = a_source.clone();
assert_seq_equal(a.interleave(vec![4, 5]), vec![1, 4, 2, 5, 3]);
let a = a_source.clone();
assert_seq_equal(a.interleave(vec![]), vec![1, 2, 3]);
assert_seq_equal(e.interleave(vec![1]), vec![]);

// interleave_exact
let a = a_source.clone();
let e = e_source.clone();
assert_seq_equal(a.interleave_exact(vec![4, 5, 6]), vec![1, 4, 2, 5, 3, 6]);
let a = a_source.clone();
assert_seq_equal(a.interleave_exact(vec![4, 5]), vec![1, 4, 2, 5]);
let a = a_source.clone();
assert_seq_equal(a.interleave_exact(vec![]), vec![]);
assert_seq_equal(e.interleave_exact(vec![1]), vec![]);

// intersperse - FIXME - fix the failing test case
// let a = a_source.clone();
// let e = e_source.clone();
// assert_seq_equal(a.intersperse(1, 0), vec![1, 0, 2, 0, 3]);
// let a = a_source.clone();
// assert_seq_equal(a.intersperse(2, 0), vec![1, 2, 0, 3]);
// let a = a_source.clone();
// assert_seq_equal(a.intersperse(3, 0), vec![1, 2, 3]);
// assert_seq_equal(e.intersperse(1, 0), vec![]);

// intersperse_with - FIXME - fix the failing test case
// let a = a_source.clone();
// let e = e_source.clone();
// assert_seq_equal(a.intersperse_with(2, || 0), vec![1, 2, 0, 3]);
// let a = a_source.clone();
// assert_seq_equal(a.intersperse_with(3, || 0), vec![1, 2, 3]);
// assert_seq_equal(e.intersperse_with(1, || 0), vec![]);

// // rev
// assert_equal(repeated.clone().rev(), vec![3, 2, 2, 1]);
// assert_equal(empty.clone().rev(), vec![]);
Expand Down

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