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package nebula
import (
"testing"
"github.com/slackhq/nebula/test"
"github.com/stretchr/testify/assert"
)
func TestBits(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
// make sure it is the right size
assert.Len(t, b.bits, 10)
// This is initialized to zero - receive one. This should work.
assert.True(t, b.Check(l, 1))
assert.True(t, b.Update(l, 1))
assert.EqualValues(t, 1, b.current)
g := []bool{true, true, false, false, false, false, false, false, false, false}
assert.Equal(t, g, b.bits)
// Receive two
assert.True(t, b.Check(l, 2))
assert.True(t, b.Update(l, 2))
assert.EqualValues(t, 2, b.current)
g = []bool{true, true, true, false, false, false, false, false, false, false}
assert.Equal(t, g, b.bits)
// Receive two again - it will fail
assert.False(t, b.Check(l, 2))
assert.False(t, b.Update(l, 2))
assert.EqualValues(t, 2, b.current)
// Jump ahead to 15, which should clear everything and set the 6th element
assert.True(t, b.Check(l, 15))
assert.True(t, b.Update(l, 15))
assert.EqualValues(t, 15, b.current)
g = []bool{false, false, false, false, false, true, false, false, false, false}
assert.Equal(t, g, b.bits)
// Mark 14, which is allowed because it is in the window
assert.True(t, b.Check(l, 14))
assert.True(t, b.Update(l, 14))
assert.EqualValues(t, 15, b.current)
g = []bool{false, false, false, false, true, true, false, false, false, false}
assert.Equal(t, g, b.bits)
// Mark 5, which is not allowed because it is not in the window
assert.False(t, b.Check(l, 5))
assert.False(t, b.Update(l, 5))
assert.EqualValues(t, 15, b.current)
g = []bool{false, false, false, false, true, true, false, false, false, false}
assert.Equal(t, g, b.bits)
// make sure we handle wrapping around once to the current position
b = NewBits(10)
assert.True(t, b.Update(l, 1))
assert.True(t, b.Update(l, 11))
assert.Equal(t, []bool{false, true, false, false, false, false, false, false, false, false}, b.bits)
// Walk through a few windows in order
b = NewBits(10)
for i := uint64(1); i <= 100; i++ {
assert.True(t, b.Check(l, i), "Error while checking %v", i)
assert.True(t, b.Update(l, i), "Error while updating %v", i)
}
assert.False(t, b.Check(l, 1), "Out of window check")
}
func TestBitsLargeJumps(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
b.lostCounter.Clear()
b = NewBits(10)
b.lostCounter.Clear()
assert.True(t, b.Update(l, 55)) // We saw packet 55 and can still track 45,46,47,48,49,50,51,52,53,54
assert.Equal(t, int64(45), b.lostCounter.Count())
assert.True(t, b.Update(l, 100)) // We saw packet 55 and 100 and can still track 90,91,92,93,94,95,96,97,98,99
assert.Equal(t, int64(89), b.lostCounter.Count())
assert.True(t, b.Update(l, 200)) // We saw packet 55, 100, and 200 and can still track 190,191,192,193,194,195,196,197,198,199
assert.Equal(t, int64(188), b.lostCounter.Count())
}
func TestBitsDupeCounter(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
assert.True(t, b.Update(l, 1))
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.False(t, b.Update(l, 1))
assert.Equal(t, int64(1), b.dupeCounter.Count())
assert.True(t, b.Update(l, 2))
assert.Equal(t, int64(1), b.dupeCounter.Count())
assert.True(t, b.Update(l, 3))
assert.Equal(t, int64(1), b.dupeCounter.Count())
assert.False(t, b.Update(l, 1))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.Equal(t, int64(2), b.dupeCounter.Count())
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
}
func TestBitsOutOfWindowCounter(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
assert.True(t, b.Update(l, 20))
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
assert.True(t, b.Update(l, 21))
assert.True(t, b.Update(l, 22))
assert.True(t, b.Update(l, 23))
assert.True(t, b.Update(l, 24))
assert.True(t, b.Update(l, 25))
assert.True(t, b.Update(l, 26))
assert.True(t, b.Update(l, 27))
assert.True(t, b.Update(l, 28))
assert.True(t, b.Update(l, 29))
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
assert.False(t, b.Update(l, 0))
assert.Equal(t, int64(1), b.outOfWindowCounter.Count())
assert.Equal(t, int64(19), b.lostCounter.Count()) // packet 0 wasn't lost
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.Equal(t, int64(1), b.outOfWindowCounter.Count())
}
func TestBitsLostCounter(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
assert.True(t, b.Update(l, 20))
assert.True(t, b.Update(l, 21))
assert.True(t, b.Update(l, 22))
assert.True(t, b.Update(l, 23))
assert.True(t, b.Update(l, 24))
assert.True(t, b.Update(l, 25))
assert.True(t, b.Update(l, 26))
assert.True(t, b.Update(l, 27))
assert.True(t, b.Update(l, 28))
assert.True(t, b.Update(l, 29))
assert.Equal(t, int64(19), b.lostCounter.Count()) // packet 0 wasn't lost
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
b = NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
assert.True(t, b.Update(l, 9))
assert.Equal(t, int64(0), b.lostCounter.Count())
// 10 will set 0 index, 0 was already set, no lost packets
assert.True(t, b.Update(l, 10))
assert.Equal(t, int64(0), b.lostCounter.Count())
// 11 will set 1 index, 1 was missed, we should see 1 packet lost
assert.True(t, b.Update(l, 11))
assert.Equal(t, int64(1), b.lostCounter.Count())
// Now let's fill in the window, should end up with 8 lost packets
assert.True(t, b.Update(l, 12))
assert.True(t, b.Update(l, 13))
assert.True(t, b.Update(l, 14))
assert.True(t, b.Update(l, 15))
assert.True(t, b.Update(l, 16))
assert.True(t, b.Update(l, 17))
assert.True(t, b.Update(l, 18))
assert.True(t, b.Update(l, 19))
assert.Equal(t, int64(8), b.lostCounter.Count())
// Jump ahead by a window size
assert.True(t, b.Update(l, 29))
assert.Equal(t, int64(8), b.lostCounter.Count())
// Now lets walk ahead normally through the window, the missed packets should fill in
assert.True(t, b.Update(l, 30))
assert.True(t, b.Update(l, 31))
assert.True(t, b.Update(l, 32))
assert.True(t, b.Update(l, 33))
assert.True(t, b.Update(l, 34))
assert.True(t, b.Update(l, 35))
assert.True(t, b.Update(l, 36))
assert.True(t, b.Update(l, 37))
assert.True(t, b.Update(l, 38))
// 39 packets tracked, 22 seen, 17 lost
assert.Equal(t, int64(17), b.lostCounter.Count())
// Jump ahead by 2 windows, should have recording 1 full window missing
assert.True(t, b.Update(l, 58))
assert.Equal(t, int64(27), b.lostCounter.Count())
// Now lets walk ahead normally through the window, the missed packets should fill in from this window
assert.True(t, b.Update(l, 59))
assert.True(t, b.Update(l, 60))
assert.True(t, b.Update(l, 61))
assert.True(t, b.Update(l, 62))
assert.True(t, b.Update(l, 63))
assert.True(t, b.Update(l, 64))
assert.True(t, b.Update(l, 65))
assert.True(t, b.Update(l, 66))
assert.True(t, b.Update(l, 67))
// 68 packets tracked, 32 seen, 36 missed
assert.Equal(t, int64(36), b.lostCounter.Count())
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
}
func TestBitsLostCounterIssue1(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
assert.True(t, b.Update(l, 4))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 1))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 9))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 2))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 3))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 5))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 6))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 7))
assert.Equal(t, int64(0), b.lostCounter.Count())
// assert.True(t, b.Update(l, 8))
assert.True(t, b.Update(l, 10))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 11))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 14))
assert.Equal(t, int64(0), b.lostCounter.Count())
// Issue seems to be here, we reset missing packet 8 to false here and don't increment the lost counter
assert.True(t, b.Update(l, 19))
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.True(t, b.Update(l, 12))
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.True(t, b.Update(l, 13))
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.True(t, b.Update(l, 15))
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.True(t, b.Update(l, 16))
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.True(t, b.Update(l, 17))
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.True(t, b.Update(l, 18))
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.True(t, b.Update(l, 20))
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.True(t, b.Update(l, 21))
// We missed packet 8 above
assert.Equal(t, int64(1), b.lostCounter.Count())
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
}
func BenchmarkBits(b *testing.B) {
z := NewBits(10)
for n := 0; n < b.N; n++ {
for i := range z.bits {
z.bits[i] = true
}
for i := range z.bits {
z.bits[i] = false
}
}
}
|
