110 lines
2.1 KiB
Go
110 lines
2.1 KiB
Go
|
// Copyright (c) 2020 Shivaram Lingamneni <slingamn@cs.stanford.edu>
|
||
|
|
// released under the MIT license
|
||
|
|
|
||
|
|
package irc
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
"math/rand"
|
||
|
|
"reflect"
|
||
|
|
"testing"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
// mockConn is a fake io.Reader that yields len(counts) lines,
|
||
|
|
// each consisting of counts[i] 'a' characters and a terminating '\n'
|
||
|
|
type mockConn struct {
|
||
|
|
counts []int
|
||
|
|
}
|
||
|
|
|
||
|
|
func min(i, j int) (m int) {
|
||
|
|
if i < j {
|
||
|
|
return i
|
||
|
|
} else {
|
||
|
|
return j
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *mockConn) Read(b []byte) (n int, err error) {
|
||
|
|
for len(b) > 0 {
|
||
|
|
if len(c.counts) == 0 {
|
||
|
|
return n, io.EOF
|
||
|
|
}
|
||
|
|
if c.counts[0] == 0 {
|
||
|
|
b[0] = '\n'
|
||
|
|
c.counts = c.counts[1:]
|
||
|
|
b = b[1:]
|
||
|
|
n += 1
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
size := min(c.counts[0], len(b))
|
||
|
|
for i := 0; i < size; i++ {
|
||
|
|
b[i] = 'a'
|
||
|
|
}
|
||
|
|
c.counts[0] -= size
|
||
|
|
b = b[size:]
|
||
|
|
n += size
|
||
|
|
}
|
||
|
|
return n, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *mockConn) Write(b []byte) (n int, err error) {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *mockConn) Close() error {
|
||
|
|
c.counts = nil
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func newMockConn(counts []int) *mockConn {
|
||
|
|
cpCounts := make([]int, len(counts))
|
||
|
|
copy(cpCounts, counts)
|
||
|
|
return &mockConn{
|
||
|
|
counts: cpCounts,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// construct a mock reader with some number of \n-terminated lines,
|
||
|
|
// verify that IRCStreamConn can read and split them as expected
|
||
|
|
func doLineReaderTest(counts []int, t *testing.T) {
|
||
|
|
c := newMockConn(counts)
|
||
|
|
r := NewIRCReader(c)
|
||
|
|
var readCounts []int
|
||
|
|
for {
|
||
|
|
line, err := r.ReadLine()
|
||
|
|
if err == nil {
|
||
|
|
readCounts = append(readCounts, len(line))
|
||
|
|
} else if err == io.EOF {
|
||
|
|
break
|
||
|
|
} else {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if !reflect.DeepEqual(counts, readCounts) {
|
||
|
|
t.Errorf("expected %#v, got %#v", counts, readCounts)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
const (
|
||
|
|
maxMockReaderLen = 100
|
||
|
|
maxMockReaderLineLen = 4096 + 511
|
||
|
|
)
|
||
|
|
|
||
|
|
func TestLineReader(t *testing.T) {
|
||
|
|
counts := []int{44, 428, 3, 0, 200, 2000, 0, 4044, 33, 3, 2, 1, 0, 1, 2, 3, 48, 555}
|
||
|
|
doLineReaderTest(counts, t)
|
||
|
|
|
||
|
|
// fuzz
|
||
|
|
r := rand.New(rand.NewSource(time.Now().UnixNano()))
|
||
|
|
for i := 0; i < 1000; i++ {
|
||
|
|
countsLen := r.Intn(maxMockReaderLen) + 1
|
||
|
|
counts := make([]int, countsLen)
|
||
|
|
for i := 0; i < countsLen; i++ {
|
||
|
|
counts[i] = r.Intn(maxMockReaderLineLen)
|
||
|
|
}
|
||
|
|
doLineReaderTest(counts, t)
|
||
|
|
}
|
||
|
|
}
|