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package objectpacker
import (
"bytes"
"github.com/icinga/icingadb/pkg/types"
"github.com/pkg/errors"
"io"
"testing"
)
// limitedWriter allows writing a specific amount of data.
type limitedWriter struct {
// limit specifies how many bytes to allow to write.
limit int
}
var _ io.Writer = (*limitedWriter)(nil)
// Write returns io.EOF once lw.limit is exceeded, nil otherwise.
func (lw *limitedWriter) Write(p []byte) (n int, err error) {
if len(p) <= lw.limit {
lw.limit -= len(p)
return len(p), nil
}
n = lw.limit
err = io.EOF
lw.limit = 0
return
}
func TestLimitedWriter_Write(t *testing.T) {
assertLimitedWriter_Write(t, 3, []byte{1, 2}, 2, nil, 1)
assertLimitedWriter_Write(t, 3, []byte{1, 2, 3}, 3, nil, 0)
assertLimitedWriter_Write(t, 3, []byte{1, 2, 3, 4}, 3, io.EOF, 0)
assertLimitedWriter_Write(t, 0, []byte{1}, 0, io.EOF, 0)
assertLimitedWriter_Write(t, 0, nil, 0, nil, 0)
}
func assertLimitedWriter_Write(t *testing.T, limitBefore int, p []byte, n int, err error, limitAfter int) {
t.Helper()
lw := limitedWriter{limitBefore}
actualN, actualErr := lw.Write(p)
if !errors.Is(actualErr, err) {
t.Errorf("_, err := (&limitedWriter{%d}).Write(%#v); err != %#v", limitBefore, p, err)
}
if actualN != n {
t.Errorf("n, _ := (&limitedWriter{%d}).Write(%#v); n != %d", limitBefore, p, n)
}
if lw.limit != limitAfter {
t.Errorf("lw := limitedWriter{%d}; lw.Write(%#v); lw.limit != %d", limitBefore, p, limitAfter)
}
}
func TestPackAny(t *testing.T) {
assertPackAny(t, nil, []byte{0})
assertPackAny(t, false, []byte{1})
assertPackAny(t, true, []byte{2})
assertPackAnyPanic(t, -42, 0)
assertPackAnyPanic(t, int8(-42), 0)
assertPackAnyPanic(t, int16(-42), 0)
assertPackAnyPanic(t, int32(-42), 0)
assertPackAnyPanic(t, int64(-42), 0)
assertPackAnyPanic(t, uint(42), 0)
assertPackAnyPanic(t, uint8(42), 0)
assertPackAnyPanic(t, uint16(42), 0)
assertPackAnyPanic(t, uint32(42), 0)
assertPackAnyPanic(t, uint64(42), 0)
assertPackAnyPanic(t, uintptr(42), 0)
assertPackAnyPanic(t, float32(-42.5), 0)
assertPackAny(t, -42.5, []byte{3, 0xc0, 0x45, 0x40, 0, 0, 0, 0, 0})
assertPackAnyPanic(t, []struct{}(nil), 9)
assertPackAnyPanic(t, []struct{}{}, 9)
assertPackAny(t, []interface{}{nil, true, -42.5}, []byte{
5, 0, 0, 0, 0, 0, 0, 0, 3,
0,
2,
3, 0xc0, 0x45, 0x40, 0, 0, 0, 0, 0,
})
assertPackAny(t, []string{"", "a"}, []byte{
5, 0, 0, 0, 0, 0, 0, 0, 2,
4, 0, 0, 0, 0, 0, 0, 0, 0,
4, 0, 0, 0, 0, 0, 0, 0, 1, 'a',
})
assertPackAnyPanic(t, []interface{}{0 + 0i}, 9)
assertPackAnyPanic(t, map[struct{}]struct{}(nil), 9)
assertPackAnyPanic(t, map[struct{}]struct{}{}, 9)
assertPackAny(t, map[interface{}]interface{}{true: "", "nil": -42.5}, []byte{
6, 0, 0, 0, 0, 0, 0, 0, 2,
0, 0, 0, 0, 0, 0, 0, 3, 'n', 'i', 'l',
3, 0xc0, 0x45, 0x40, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 4, 't', 'r', 'u', 'e',
4, 0, 0, 0, 0, 0, 0, 0, 0,
})
assertPackAny(t, map[string]float64{"": 42}, []byte{
6, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 0, 0,
3, 0x40, 0x45, 0, 0, 0, 0, 0, 0,
})
assertPackAny(t, map[[1]byte]bool{{42}: true}, []byte{
6, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 0, 1, 42,
2,
})
assertPackAnyPanic(t, map[struct{}]struct{}{{}: {}}, 9)
assertPackAny(t, (*string)(nil), []byte{0})
assertPackAnyPanic(t, (*int)(nil), 0)
assertPackAny(t, new(float64), []byte{3, 0, 0, 0, 0, 0, 0, 0, 0})
assertPackAny(t, "", []byte{4, 0, 0, 0, 0, 0, 0, 0, 0})
assertPackAny(t, "a", []byte{4, 0, 0, 0, 0, 0, 0, 0, 1, 'a'})
assertPackAny(t, "ä", []byte{4, 0, 0, 0, 0, 0, 0, 0, 2, 0xc3, 0xa4})
{
var binary [256]byte
for i := range binary {
binary[i] = byte(i)
}
assertPackAny(t, binary, append([]byte{4, 0, 0, 0, 0, 0, 0, 1, 0}, binary[:]...))
assertPackAny(t, binary[:], append([]byte{4, 0, 0, 0, 0, 0, 0, 1, 0}, binary[:]...))
assertPackAny(t, types.Binary(binary[:]), append([]byte{4, 0, 0, 0, 0, 0, 0, 1, 0}, binary[:]...))
}
{
type myByte byte
assertPackAnyPanic(t, []myByte(nil), 9)
}
assertPackAnyPanic(t, complex64(0+0i), 0)
assertPackAnyPanic(t, 0+0i, 0)
assertPackAnyPanic(t, make(chan struct{}), 0)
assertPackAnyPanic(t, func() {}, 0)
assertPackAnyPanic(t, struct{}{}, 0)
assertPackAnyPanic(t, uintptr(0), 0)
}
func assertPackAny(t *testing.T, in interface{}, out []byte) {
t.Helper()
{
buf := &bytes.Buffer{}
if err := PackAny(in, buf); err == nil {
if !bytes.Equal(buf.Bytes(), out) {
t.Errorf("buf := &bytes.Buffer{}; packAny(%#v, buf); !bytes.Equal(buf.Bytes(), %#v)", in, out)
}
} else {
t.Errorf("packAny(%#v, &bytes.Buffer{}) != nil", in)
}
}
for i := 0; i < len(out); i++ {
if !errors.Is(PackAny(in, &limitedWriter{i}), io.EOF) {
t.Errorf("packAny(%#v, &limitedWriter{%d}) != io.EOF", in, i)
}
}
}
func assertPackAnyPanic(t *testing.T, in interface{}, allowToWrite int) {
t.Helper()
for i := 0; i < allowToWrite; i++ {
if !errors.Is(PackAny(in, &limitedWriter{i}), io.EOF) {
t.Errorf("packAny(%#v, &limitedWriter{%d}) != io.EOF", in, i)
}
}
defer func() {
t.Helper()
if r := recover(); r == nil {
t.Errorf("packAny(%#v, &limitedWriter{%d}) didn't panic", in, allowToWrite)
}
}()
_ = PackAny(in, &limitedWriter{allowToWrite})
}
|
