mirror of
https://github.com/rjNemo/underscore
synced 2026-06-06 02:26:42 +00:00
Ruidy
85f73f63a9
- Add Sliding: creates sliding window views of a slice - Pre-allocated for optimal performance - Returns independent window copies (non-mutating) - Comprehensive tests including edge cases - Benchmark included Example: Sliding([1,2,3,4,5], 3) → [[1,2,3], [2,3,4], [3,4,5]] Resolves Issue 19 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude <noreply@anthropic.com>
90 lines
1.9 KiB
Go
90 lines
1.9 KiB
Go
package underscore_test
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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u "github.com/rjNemo/underscore"
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)
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func TestSliding(t *testing.T) {
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nums := []int{1, 2, 3, 4, 5}
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result := u.Sliding(nums, 3)
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expected := [][]int{{1, 2, 3}, {2, 3, 4}, {3, 4, 5}}
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assert.Equal(t, expected, result)
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}
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func TestSlidingEmpty(t *testing.T) {
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result := u.Sliding([]int{}, 3)
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assert.Equal(t, [][]int{}, result)
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}
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func TestSlidingSizeOne(t *testing.T) {
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nums := []int{1, 2, 3}
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result := u.Sliding(nums, 1)
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expected := [][]int{{1}, {2}, {3}}
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assert.Equal(t, expected, result)
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}
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func TestSlidingSizeEqualLength(t *testing.T) {
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nums := []int{1, 2, 3}
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result := u.Sliding(nums, 3)
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expected := [][]int{{1, 2, 3}}
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assert.Equal(t, expected, result)
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}
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func TestSlidingSizeGreaterThanLength(t *testing.T) {
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nums := []int{1, 2, 3}
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result := u.Sliding(nums, 5)
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assert.Equal(t, [][]int{}, result)
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}
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func TestSlidingSizeZero(t *testing.T) {
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nums := []int{1, 2, 3}
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result := u.Sliding(nums, 0)
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assert.Equal(t, [][]int{}, result)
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}
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func TestSlidingSizeNegative(t *testing.T) {
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nums := []int{1, 2, 3}
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result := u.Sliding(nums, -1)
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assert.Equal(t, [][]int{}, result)
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}
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func TestSlidingTwoElements(t *testing.T) {
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nums := []int{1, 2, 3, 4}
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result := u.Sliding(nums, 2)
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expected := [][]int{{1, 2}, {2, 3}, {3, 4}}
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assert.Equal(t, expected, result)
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}
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func TestSlidingStrings(t *testing.T) {
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words := []string{"a", "b", "c", "d"}
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result := u.Sliding(words, 2)
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expected := [][]string{{"a", "b"}, {"b", "c"}, {"c", "d"}}
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assert.Equal(t, expected, result)
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}
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func TestSlidingDoesNotMutate(t *testing.T) {
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original := []int{1, 2, 3, 4}
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result := u.Sliding(original, 2)
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// Modify a window
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result[0][0] = 999
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// Original should be unchanged
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assert.Equal(t, 1, original[0])
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}
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func BenchmarkSliding(b *testing.B) {
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nums := make([]int, 100)
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for i := range nums {
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nums[i] = i
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}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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u.Sliding(nums, 10)
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}
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}
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