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query_test.go
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query_test.go
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package collection
import (
"context"
"testing"
"time"
)
func Test_Empty(t *testing.T) {
if Any(Empty[int]()) {
t.Log("empty should not have any elements")
t.Fail()
}
if CountAll(Empty[int]()) != 0 {
t.Log("empty should have counted to zero elements")
t.Fail()
}
alwaysTrue := func(x int) bool {
return true
}
if Count(Empty[int](), alwaysTrue) != 0 {
t.Log("empty should have counted to zero even when discriminating")
t.Fail()
}
}
func BenchmarkEnumerator_Sum(b *testing.B) {
var nums EnumerableSlice[int] = getInitializedSequentialArray[int]()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
b.ResetTimer()
for i := 0; i < b.N; i++ {
slowNums := Select[int, int](nums, sleepIdentity[int])
for range slowNums.Enumerate(ctx) {
// Intentionally Left Blank
}
}
}
func sleepIdentity[T any](val T) T {
time.Sleep(2 * time.Millisecond)
return val
}
func getInitializedSequentialArray[T ~int]() []T {
rawNums := make([]T, 1000, 1000)
for i := range rawNums {
rawNums[i] = T(i + 1)
}
return rawNums
}