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Copy pathtrackRTP_math_test.go
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274 lines (240 loc) · 5.46 KB
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package goTrackRTP
import (
"reflect"
"testing"
_ "unsafe"
)
// https://github.com/randomizedcoder/goTrackRTP/
// See also: https://dave.cheney.net/2019/05/07/prefer-table-driven-tests
func BenchmarkIsLess(b *testing.B) {
for i := 0; i < b.N; i++ {
if i%2 == 0 {
isLess(uint16(i), uint16(i+5))
} else {
isLess(uint16(i), uint16(i-5))
}
}
}
func BenchmarkIsGreaterBranchless(b *testing.B) {
for i := 0; i < b.N; i++ {
if i%2 == 0 {
isLessBranchless(uint16(i), uint16(i+5))
} else {
isLessBranchless(uint16(i), uint16(i-5))
}
}
}
func BenchmarkIsGreaterBranch(b *testing.B) {
for i := 0; i < b.N; i++ {
if i%2 == 0 {
isLessBranch(uint16(i), uint16(i+5))
} else {
isLessBranch(uint16(i), uint16(i-5))
}
}
}
func TestIsLess(t *testing.T) {
type test struct {
m uint16
seq uint16
want bool
}
tests := []test{
// obvious
{0, 1, false},
{1, 0, true},
{100, 101, false},
{101, 100, true},
{65535, 65534, true},
// less obvious
{0, 65535, true},
{65535, 0, false},
{1, 65535, true},
{65535, 1, false},
{10, 65535, true},
{65535, 10, false},
{100, 65535, true},
{65535, 100, false},
{0, maxUint16 / 2, false},
{maxUint16 / 2, 0, true},
// more for good measure
{0, 65000, true},
{65000, 0, false},
{1, 65000, true},
{65000, 1, false},
{10, 65000, true},
{65000, 10, false},
{100, 65000, true},
{65000, 100, false},
// same
{0, 0, false},
{1000, 1000, false},
{maxUint16 / 2, maxUint16 / 2, false},
{65535, 65535, false},
}
for i, tc := range tests {
t.Logf("%s i:%d, m:%v, seq:%v\n", t.Name(), i, tc.m, tc.seq)
got := isLess(tc.seq, tc.m)
if !reflect.DeepEqual(tc.want, got) {
t.Fatalf("test: %d, expected: %v, got: %v", i, tc.want, got)
}
}
}
func TestIsLessBranchless(t *testing.T) {
type test struct {
m uint16
seq uint16
want bool
}
tests := []test{
// obvious
{0, 1, false},
{1, 0, true},
{100, 101, false},
{101, 100, true},
{65535, 65534, true},
// less obvious
{0, 65535, true},
{65535, 0, false},
{1, 65535, true},
{65535, 1, false},
{10, 65535, true},
{65535, 10, false},
{100, 65535, true},
{65535, 100, false},
{0, maxUint16 / 2, false},
{maxUint16 / 2, 0, true},
// more for good measure
{0, 65000, true},
{65000, 0, false},
{1, 65000, true},
{65000, 1, false},
{10, 65000, true},
{65000, 10, false},
{100, 65000, true},
{65000, 100, false},
// same
{0, 0, false},
{1000, 1000, false},
{maxUint16 / 2, maxUint16 / 2, false},
{65535, 65535, false},
}
for i, tc := range tests {
t.Logf("%s i:%d, m:%v, seq:%v\n", t.Name(), i, tc.m, tc.seq)
got := isLessBranchless(tc.seq, tc.m)
if !reflect.DeepEqual(tc.want, got) {
t.Fatalf("test: %d, expected: %v, got: %v", i, tc.want, got)
}
}
}
func TestIsLessBranch(t *testing.T) {
type test struct {
m uint16
seq uint16
want bool
}
tests := []test{
// obvious
{0, 1, false},
{1, 0, true},
{100, 101, false},
{101, 100, true},
{65535, 65534, true},
// less obvious
{0, 65535, true},
{65535, 0, false},
{1, 65535, true},
{65535, 1, false},
{10, 65535, true},
{65535, 10, false},
{100, 65535, true},
{65535, 100, false},
{0, maxUint16 / 2, false},
{maxUint16 / 2, 0, true},
// more for good measure
{0, 65000, true},
{65000, 0, false},
{1, 65000, true},
{65000, 1, false},
{10, 65000, true},
{65000, 10, false},
{100, 65000, true},
{65000, 100, false},
// same
{0, 0, false},
{1000, 1000, false},
{maxUint16 / 2, maxUint16 / 2, false},
{65535, 65535, false},
}
for i, tc := range tests {
t.Logf("%s i:%d, m:%v, seq:%v\n", t.Name(), i, tc.m, tc.seq)
got := isLessBranch(tc.seq, tc.m)
if !reflect.DeepEqual(tc.want, got) {
t.Fatalf("test: %d, expected: %v, got: %v", i, tc.want, got)
}
}
}
func TestDiff(t *testing.T) {
type test struct {
m uint16
seq uint16
want uint16
}
tests := []test{
{0, 1, 1},
{1, 0, 1},
// wrapping
{0, 65535, 1},
{65535, 0, 1},
{1, 65535, 2},
{65535, 1, 2},
{10, 65535, 11},
{65535, 10, 11},
// obvious
{0, 1, 1},
{1, 0, 1},
{100, 101, 1},
{101, 100, 1},
{65534, 65535, 1},
{65535, 65534, 1},
{1, 65535, 2},
{10, 65535, 11},
{100, 65535, 101},
{0, maxUint16 / 2, maxUint16 / 2},
{maxUint16 / 2, 0, maxUint16 / 2},
//{0, 65000, 65000}, // fails
{1, 65000, 537},
{10, 65000, 546},
{100, 65000, 636},
// // same
{0, 0, 0},
{1000, 1000, 0},
{maxUint16 / 2, maxUint16 / 2, 0},
{65535, 65535, 0},
}
// I was trying to work out a branchless version, but didn't get there yet
// can't work out how to iterate function :(
// var fns []func(s1, s2 uint16)
// fns = append(fns, absoluteDifference)
// fns = append(fns, uint16Diff)
//fns := []string{"absoluteDifference", "uint16Diff"}
//fns := []string{"uint16Diff"}
for i, tc := range tests {
//for f, fn := range fns {
t.Logf("%s i:%d, m:%v, seq:%v, want:%d\n", t.Name(), i, tc.m, tc.seq, tc.want)
//t.Logf("%s i:%d, fn:%s, m:%v, seq:%v, want:%d\n", t.Name(), i, fn, tc.m, tc.seq, tc.want)
//got := fn(tc.m, tc.seq)
// var got uint16
// if f == 1 {
// got = absoluteDifference(tc.m, tc.seq)
// } else {
// got = uint16Diff(tc.m, tc.seq)
// }
got := uint16Diff(tc.m, tc.seq)
t.Logf("%s i:%d, m:%v, seq:%v, want:%d, got:%d, deepequal:%t\n", t.Name(), i, tc.m, tc.seq, tc.want, got, reflect.DeepEqual(tc.want, got))
if !reflect.DeepEqual(tc.want, got) {
t.Fatalf("test: %d, expected: %v, got: %v", i, tc.want, got)
}
//}
}
}