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// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
package utils
import (
"fmt"
"reflect"
"testing"
)
var _ = fmt.Print
func TestRingBuffer(t *testing.T) {
r := NewRingBuffer[int](8)
test_contents := func(expected ...int) {
actual := make([]int, len(expected))
num_read := r.ReadTillEmpty(actual)
if num_read != uint64(len(actual)) {
t.Fatalf("Did not read expected num of items: %d != %d", num_read, len(expected))
}
if !reflect.DeepEqual(expected, actual) {
t.Fatalf("Did not read expected items:\n%#v != %#v", actual, expected)
}
if r.Len() != 0 {
t.Fatalf("Reading contents did not empty the buffer")
}
}
r.WriteTillFull(1, 2, 3, 4)
test_contents(1, 2, 3, 4)
r.WriteTillFull(1, 2, 3, 4)
test_contents(1, 2, 3, 4)
r.Clear()
r.WriteTillFull(1, 2, 3, 4)
r.ReadTillEmpty([]int{0, 1})
test_contents(3, 4)
r.WriteTillFull(1, 2, 3, 4, 5)
test_contents(1, 2, 3, 4, 5)
r.Clear()
r.WriteTillFull(1, 2, 3, 4)
r.WriteAllAndDiscardOld(5, 6, 7, 8, 9)
test_contents(2, 3, 4, 5, 6, 7, 8, 9)
}
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