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cache_test.go
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cache_test.go
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package ranges
import (
"testing"
)
func TestCache(t *testing.T) {
t.Parallel()
assertEqual(t, Slice(Cache(Null[int]())), []int{})
assertEqual(t, Slice(Cache(Only(1, 2, 3))), []int{1, 2, 3})
storedValues := make([]int, 0)
r := Cache(
Map(Only(5, 6, 7), func(elem int) int { storedValues = append(storedValues, elem); return elem }),
)
r.Front()
r.Front()
r.PopFront()
r.Front()
r.Front()
r.PopFront()
r.Front()
r.Front()
r.PopFront()
assertEqual(t, storedValues, []int{5, 6, 7})
}
func TestCacheF(t *testing.T) {
t.Parallel()
assertEqual(t, SliceF(CacheF(Null[int]())), []int{})
assertEqual(t, SliceF(CacheF(Only(1, 2, 3))), []int{1, 2, 3})
storedValues := make([]int, 0)
r := CacheF(
MapF(Only(5, 6, 7), func(elem int) int { storedValues = append(storedValues, elem); return elem }),
)
r.Front()
r.Front()
r.PopFront()
r2Save := r.Save()
r.Front()
r.Front()
r.PopFront()
r2Save.Front()
r2Save.Front()
r2Save.PopFront()
r.Front()
r.Front()
r.PopFront()
assertEqual(t, storedValues, []int{5, 6, 6, 7})
}
func TestCacheB(t *testing.T) {
t.Parallel()
assertEqual(t, SliceB(CacheB(Null[int]())), []int{})
assertEqual(t, SliceB(CacheB(Only(1, 2, 3))), []int{1, 2, 3})
storedValues := make([]int, 0)
r := CacheB(
MapB(Only(5, 6, 7), func(elem int) int { storedValues = append(storedValues, elem); return elem }),
)
r.Front()
r.Front()
r.PopFront()
r2Save := r.Save()
r.Front()
r.Front()
r.PopFront()
r2Save.Front()
r2Save.Front()
r2Save.PopFront()
r.Front()
r.Front()
r.PopFront()
assertEqual(t, storedValues, []int{5, 6, 6, 7})
}
func TestCacheBBack(t *testing.T) {
t.Parallel()
assertEqual(t, SliceB(Retro(CacheB(Null[int]()))), []int{})
assertEqual(t, SliceB(Retro(CacheB(Only(1, 2, 3)))), []int{3, 2, 1})
storedValues := make([]int, 0)
r := CacheB(
MapB(Only(5, 6, 7), func(elem int) int { storedValues = append(storedValues, elem); return elem }),
)
r.Back()
r.Back()
r.PopBack()
r2Save := r.SaveB()
r.Back()
r.Back()
r.PopBack()
r2Save.Back()
r2Save.Back()
r2Save.PopBack()
r.Back()
r.Back()
r.PopBack()
assertEqual(t, storedValues, []int{7, 6, 6, 5})
}