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package tiff
import (
"bytes"
"encoding/binary"
"encoding/hex"
"flag"
"os"
"path/filepath"
"testing"
)
var dataDir = flag.String("test_data_dir", ".", "Directory where the data files for testing are located")
type input struct {
tgId string
tpe string
nVals string
offset string
val string
}
type output struct {
id uint16
typ DataType
count uint32
val []byte
}
type tagTest struct {
big input // big endian
little input // little endian
out output
}
///////////////////////////////////////////////
//// Big endian Tests /////////////////////////
///////////////////////////////////////////////
var set1 = []tagTest{
//////////// string type //////////////
tagTest{
// {"TgId", "TYPE", "N-VALUES", "OFFSET--", "VAL..."},
input{"0003", "0002", "00000002", "11000000", ""},
input{"0300", "0200", "02000000", "11000000", ""},
output{0x0003, DataType(0x0002), 0x0002, []byte{0x11, 0x00}},
},
tagTest{
input{"0001", "0002", "00000006", "00000012", "111213141516"},
input{"0100", "0200", "06000000", "12000000", "111213141516"},
output{0x0001, DataType(0x0002), 0x0006, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16}},
},
// broken Count, because it includes all trailing NULL bytes, as is the case in
// https://user-images.githubusercontent.com/2621/39392188-71a66fc4-4a66-11e8-9e3b-694163efa643.jpg
tagTest{
input{"0001", "0002", "00000009", "00000012", "111213141516000000"},
input{"0100", "0200", "09000000", "12000000", "111213141516000000"},
output{0x0001, DataType(0x0002), 0x0009, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16}},
},
//////////// int (1-byte) type ////////////////
tagTest{
input{"0001", "0001", "00000001", "11000000", ""},
input{"0100", "0100", "01000000", "11000000", ""},
output{0x0001, DataType(0x0001), 0x0001, []byte{0x11}},
},
tagTest{
input{"0001", "0001", "00000005", "00000010", "1112131415"},
input{"0100", "0100", "05000000", "10000000", "1112131415"},
output{0x0001, DataType(0x0001), 0x0005, []byte{0x11, 0x12, 0x13, 0x14, 0x15}},
},
tagTest{
input{"0001", "0006", "00000001", "11000000", ""},
input{"0100", "0600", "01000000", "11000000", ""},
output{0x0001, DataType(0x0006), 0x0001, []byte{0x11}},
},
tagTest{
input{"0001", "0006", "00000005", "00000010", "1112131415"},
input{"0100", "0600", "05000000", "10000000", "1112131415"},
output{0x0001, DataType(0x0006), 0x0005, []byte{0x11, 0x12, 0x13, 0x14, 0x15}},
},
//////////// int (2-byte) types ////////////////
tagTest{
input{"0001", "0003", "00000002", "11111212", ""},
input{"0100", "0300", "02000000", "11111212", ""},
output{0x0001, DataType(0x0003), 0x0002, []byte{0x11, 0x11, 0x12, 0x12}},
},
tagTest{
input{"0001", "0003", "00000003", "00000010", "111213141516"},
input{"0100", "0300", "03000000", "10000000", "111213141516"},
output{0x0001, DataType(0x0003), 0x0003, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16}},
},
tagTest{
input{"0001", "0008", "00000001", "11120000", ""},
input{"0100", "0800", "01000000", "11120000", ""},
output{0x0001, DataType(0x0008), 0x0001, []byte{0x11, 0x12}},
},
tagTest{
input{"0001", "0008", "00000003", "00000100", "111213141516"},
input{"0100", "0800", "03000000", "00100000", "111213141516"},
output{0x0001, DataType(0x0008), 0x0003, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16}},
},
//////////// int (4-byte) types ////////////////
tagTest{
input{"0001", "0004", "00000001", "11121314", ""},
input{"0100", "0400", "01000000", "11121314", ""},
output{0x0001, DataType(0x0004), 0x0001, []byte{0x11, 0x12, 0x13, 0x14}},
},
tagTest{
input{"0001", "0004", "00000002", "00000010", "1112131415161718"},
input{"0100", "0400", "02000000", "10000000", "1112131415161718"},
output{0x0001, DataType(0x0004), 0x0002, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18}},
},
tagTest{
input{"0001", "0009", "00000001", "11121314", ""},
input{"0100", "0900", "01000000", "11121314", ""},
output{0x0001, DataType(0x0009), 0x0001, []byte{0x11, 0x12, 0x13, 0x14}},
},
tagTest{
input{"0001", "0009", "00000002", "00000011", "1112131415161819"},
input{"0100", "0900", "02000000", "11000000", "1112131415161819"},
output{0x0001, DataType(0x0009), 0x0002, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18, 0x19}},
},
//////////// rational types ////////////////////
tagTest{
input{"0001", "0005", "00000001", "00000010", "1112131415161718"},
input{"0100", "0500", "01000000", "10000000", "1112131415161718"},
output{0x0001, DataType(0x0005), 0x0001, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18}},
},
tagTest{
input{"0001", "000A", "00000001", "00000011", "1112131415161819"},
input{"0100", "0A00", "01000000", "11000000", "1112131415161819"},
output{0x0001, DataType(0x000A), 0x0001, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18, 0x19}},
},
//////////// float types ///////////////////////
tagTest{
input{"0001", "0005", "00000001", "00000010", "1112131415161718"},
input{"0100", "0500", "01000000", "10000000", "1112131415161718"},
output{0x0001, DataType(0x0005), 0x0001, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18}},
},
tagTest{
input{"0101", "000A", "00000001", "00000011", "1112131415161819"},
input{"0101", "0A00", "01000000", "11000000", "1112131415161819"},
output{0x0101, DataType(0x000A), 0x0001, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18, 0x19}},
},
}
func TestDecodeTag(t *testing.T) {
for i, tst := range set1 {
testSingle(t, binary.BigEndian, tst.big, tst.out, i)
testSingle(t, binary.LittleEndian, tst.little, tst.out, i)
}
}
func testSingle(t *testing.T, order binary.ByteOrder, in input, out output, i int) {
data := buildInput(in, order)
buf := bytes.NewReader(data)
tg, err := DecodeTag(buf, order)
if err != nil {
t.Errorf("(%v) tag %v%+v decode failed: %v", order, i, in, err)
return
}
if tg.Id != out.id {
t.Errorf("(%v) tag %v id decode: expected %v, got %v", order, i, out.id, tg.Id)
}
if tg.Type != out.typ {
t.Errorf("(%v) tag %v type decode: expected %v, got %v", order, i, out.typ, tg.Type)
}
if tg.Count != out.count {
t.Errorf("(%v) tag %v component count decode: expected %v, got %v", order, i, out.count, tg.Count)
}
if tg.Type == DTAscii && in.val != "" {
strOut := string(out.val)
if tg.strVal != strOut {
t.Errorf("(%v) tag %v string value decode: expected %q, got %q", order, i, strOut, tg.strVal)
}
} else {
if !bytes.Equal(tg.Val, out.val) {
t.Errorf("(%v) tag %v value decode: expected %q, got %q", order, i, out.val, tg.Val)
}
}
}
// buildInputBig creates a byte-slice based on big-endian ordered input
func buildInput(in input, order binary.ByteOrder) []byte {
data := make([]byte, 0)
d, _ := hex.DecodeString(in.tgId)
data = append(data, d...)
d, _ = hex.DecodeString(in.tpe)
data = append(data, d...)
d, _ = hex.DecodeString(in.nVals)
data = append(data, d...)
d, _ = hex.DecodeString(in.offset)
data = append(data, d...)
if in.val != "" {
off := order.Uint32(d)
for i := 0; i < int(off)-12; i++ {
data = append(data, 0xFF)
}
d, _ = hex.DecodeString(in.val)
data = append(data, d...)
}
return data
}
func TestDecode(t *testing.T) {
name := filepath.Join(*dataDir, "sample1.tif")
f, err := os.Open(name)
if err != nil {
t.Fatalf("%v\n", err)
}
tif, err := Decode(f)
if err != nil {
t.Fatal(err)
}
t.Log(tif)
}
func TestDecodeTag_blob(t *testing.T) {
buf := bytes.NewReader(data())
buf.Seek(10, 1)
tg, err := DecodeTag(buf, binary.LittleEndian)
if err != nil {
t.Fatalf("tag decode failed: %v", err)
}
t.Logf("tag: %v+\n", tg)
n, d, err := tg.Rat2(0)
if err != nil {
t.Fatalf("tag decoded wrong type: %v", err)
}
t.Logf("tag rat val: %v/%v\n", n, d)
}
func data() []byte {
s1 := "49492A000800000002001A0105000100"
s1 += "00002600000069870400010000001102"
s1 += "0000000000004800000001000000"
dat, err := hex.DecodeString(s1)
if err != nil {
panic("invalid string fixture")
}
return dat
}
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