package binstruct_test import ( "testing" "github.com/stretchr/testify/assert" "lukeshu.com/btrfs-tools/pkg/binstruct" ) func TestSmoke(t *testing.T) { type UUID [16]byte type PhysicalAddr int64 type DevItem struct { DeviceID uint64 `bin:"off=0x0, siz=0x8"` // device id NumBytes uint64 `bin:"off=0x8, siz=0x8"` // number of bytes NumBytesUsed uint64 `bin:"off=0x10, siz=0x8"` // number of bytes used IOOptimalAlign uint32 `bin:"off=0x18, siz=0x4"` // optimal I/O align IOOptimalWidth uint32 `bin:"off=0x1c, siz=0x4"` // optimal I/O width IOMinSize uint32 `bin:"off=0x20, siz=0x4"` // minimal I/O size (sector size) Type uint64 `bin:"off=0x24, siz=0x8"` // type Generation uint64 `bin:"off=0x2c, siz=0x8"` // generation StartOffset uint64 `bin:"off=0x34, siz=0x8"` // start offset DevGroup uint32 `bin:"off=0x3c, siz=0x4"` // dev group SeekSpeed uint8 `bin:"off=0x40, siz=0x1"` // seek speed Bandwidth uint8 `bin:"off=0x41, siz=0x1"` // bandwidth DevUUID UUID `bin:"off=0x42, siz=0x10"` // device UUID FSUUID UUID `bin:"off=0x52, siz=0x10"` // FS UUID binstruct.End `bin:"off=0x62"` } type TestType struct { Magic [5]byte `bin:"off=0x0,siz=0x5"` Dev DevItem `bin:"off=0x5,siz=0x62"` Addr PhysicalAddr `bin:"off=0x67, siz=0x8"` binstruct.End `bin:"off=0x6F"` } assert.Equal(t, 0x6F, binstruct.StaticSize(TestType{})) input := TestType{} copy(input.Magic[:], "mAgIc") input.Dev.DeviceID = 12 input.Addr = 0xBEEF bs, err := binstruct.Marshal(input) assert.NoError(t, err) assert.Equal(t, 0x6F, len(bs)) var output TestType n, err := binstruct.Unmarshal(bs, &output) assert.NoError(t, err) assert.Equal(t, 0x6F, n) assert.Equal(t, input, output) }