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tokenizer_test.go
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package tokenizers_test
import (
_ "embed"
"math/rand"
"testing"
"github.com/daulet/tokenizers"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
//go:embed test/data/sentence-transformers-labse.json
var embeddedBytes []byte
// TODO test for leaks
func TestInvalidConfigPath(t *testing.T) {
_, err := tokenizers.FromFile("./non-existent.json")
require.Error(t, err)
}
func TestEmbeddingConfig(t *testing.T) {
tk, err := tokenizers.FromBytes(embeddedBytes)
require.NoError(t, err)
defer tk.Close()
tests := []struct {
name string
str string
addSpecial bool
wantIDs []uint32
wantTypeIDs []uint32
wantTokens []string
wantSpecialTokensMask []uint32
wantAttentionMask []uint32
wantOffsets []tokenizers.Offset
}{
{
name: "without special tokens",
str: "brown fox jumps over the lazy dog",
addSpecial: false,
wantIDs: []uint32{0xca3f, 0x2f304, 0x5185b, 0x3c54, 0x3a89, 0x35fc3, 0x57b4},
wantTypeIDs: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantTokens: []string{"brown", "fox", "jumps", "over", "the", "lazy", "dog"},
wantSpecialTokensMask: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantAttentionMask: []uint32{0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1},
wantOffsets: []tokenizers.Offset{{0x0, 0x5}, {0x6, 0x9}, {0xa, 0xf}, {0x10, 0x14}, {0x15, 0x18}, {0x19, 0x1d}, {0x1e, 0x21}},
},
{
name: "with special tokens",
str: "brown fox jumps over the lazy dog",
addSpecial: true,
wantIDs: []uint32{0x65, 0xca3f, 0x2f304, 0x5185b, 0x3c54, 0x3a89, 0x35fc3, 0x57b4, 0x66},
wantTypeIDs: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantTokens: []string{"[CLS]", "brown", "fox", "jumps", "over", "the", "lazy", "dog", "[SEP]"},
wantSpecialTokensMask: []uint32{0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1},
wantAttentionMask: []uint32{0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1},
wantOffsets: []tokenizers.Offset{{0x0, 0x0}, {0x0, 0x5}, {0x6, 0x9}, {0xa, 0xf}, {0x10, 0x14}, {0x15, 0x18}, {0x19, 0x1d}, {0x1e, 0x21}, {0x0, 0x0}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
encoding := tk.EncodeWithOptions(tt.str, tt.addSpecial, tokenizers.WithReturnAllAttributes())
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, tt.wantTypeIDs, encoding.TypeIDs, "wrong type ids")
assert.Equal(t, tt.wantTokens, encoding.Tokens, "wrong tokens")
assert.Equal(t, tt.wantSpecialTokensMask, encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, tt.wantAttentionMask, encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, tt.wantOffsets, encoding.Offsets, "wrong offsets")
ids, tokens := tk.Encode(tt.str, tt.addSpecial)
assert.Equal(t, tt.wantIDs, ids, "wrong ids")
assert.Equal(t, tt.wantTokens, tokens, "wrong tokens")
})
}
}
func TestEncodeWithAndWithoutOptions(t *testing.T) {
tk, err := tokenizers.FromFile("./test/data/bert-base-uncased.json")
require.NoError(t, err)
defer tk.Close()
tests := []struct {
name string
str string
addSpecial bool
wantIDs []uint32
wantTypeIDs []uint32
wantTokens []string
wantSpecialTokensMask []uint32
wantAttentionMask []uint32
wantOffsets []tokenizers.Offset
}{
{
name: "without special tokens",
str: "brown fox jumps over the lazy dog",
addSpecial: false,
wantIDs: []uint32{2829, 4419, 14523, 2058, 1996, 13971, 3899},
wantTypeIDs: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantTokens: []string{"brown", "fox", "jumps", "over", "the", "lazy", "dog"},
wantSpecialTokensMask: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantAttentionMask: []uint32{0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1},
wantOffsets: []tokenizers.Offset{{0x0, 0x5}, {0x6, 0x9}, {0xa, 0xf}, {0x10, 0x14}, {0x15, 0x18}, {0x19, 0x1d}, {0x1e, 0x21}},
},
{
name: "with special tokens",
str: "brown fox jumps over the lazy dog",
addSpecial: true,
wantIDs: []uint32{101, 2829, 4419, 14523, 2058, 1996, 13971, 3899, 102},
wantTypeIDs: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantTokens: []string{"[CLS]", "brown", "fox", "jumps", "over", "the", "lazy", "dog", "[SEP]"},
wantSpecialTokensMask: []uint32{0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1},
wantAttentionMask: []uint32{0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1},
wantOffsets: []tokenizers.Offset{{0x0, 0x0}, {0x0, 0x5}, {0x6, 0x9}, {0xa, 0xf}, {0x10, 0x14}, {0x15, 0x18}, {0x19, 0x1d}, {0x1e, 0x21}, {0x0, 0x0}},
},
{
name: "empty string",
str: "",
addSpecial: false,
},
{
name: "empty string with special tokens",
str: "",
addSpecial: true,
wantTypeIDs: []uint32{0x0, 0x0},
wantSpecialTokensMask: []uint32{0x1, 0x1},
wantAttentionMask: []uint32{0x1, 0x1},
wantIDs: []uint32{101, 102},
wantTokens: []string{"[CLS]", "[SEP]"},
wantOffsets: []tokenizers.Offset{{0x0, 0x0}, {0x0, 0x0}},
},
{
name: "invalid utf8 string",
str: "\x91D",
addSpecial: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
encoding := tk.EncodeWithOptions(tt.str, tt.addSpecial, tokenizers.WithReturnAllAttributes())
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, tt.wantTypeIDs, encoding.TypeIDs, "wrong type ids")
assert.Equal(t, tt.wantTokens, encoding.Tokens, "wrong tokens")
assert.Equal(t, tt.wantSpecialTokensMask, encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, tt.wantAttentionMask, encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, tt.wantOffsets, encoding.Offsets, "wrong offsets mask")
ids, tokens := tk.Encode(tt.str, tt.addSpecial)
assert.Equal(t, tt.wantIDs, ids, "wrong ids")
assert.Equal(t, tt.wantTokens, tokens, "wrong tokens")
})
}
}
func TestEncodeSpecialTokens(t *testing.T) {
tk, err := tokenizers.FromBytes(embeddedBytes)
require.NoError(t, err)
// special tokens are not encoded by default,
// meaning if input matches a special token, encoding will include the special token
ids, _ := tk.Encode("[CLS]fox[SEP]", false)
assert.Equal(t, []uint32{101, 193284, 102}, ids)
tk.Close()
tk, err = tokenizers.FromBytes(embeddedBytes, tokenizers.WithEncodeSpecialTokens())
require.NoError(t, err)
ids, _ = tk.Encode("[CLS]fox[SEP]", false)
// assert that special tokens 101 and 102 are not present
assert.Equal(t, []uint32{164, 304910, 166, 193284, 164, 211703, 166}, ids)
tk.Close()
}
func TestEncodeOptions(t *testing.T) {
tk, err := tokenizers.FromFile("./test/data/bert-base-uncased.json")
require.NoError(t, err)
defer tk.Close()
tests := []struct {
name string
str string
addSpecial bool
wantIDs []uint32
wantTypeIDs []uint32
wantTokens []string
wantSpecialTokensMask []uint32
wantAttentionMask []uint32
wantOffsets []tokenizers.Offset
}{
{
name: "without special tokens",
str: "brown fox jumps over the lazy dog",
addSpecial: false,
wantIDs: []uint32{2829, 4419, 14523, 2058, 1996, 13971, 3899},
wantTypeIDs: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantTokens: []string{"brown", "fox", "jumps", "over", "the", "lazy", "dog"},
wantSpecialTokensMask: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantAttentionMask: []uint32{0x1, 0x1, 0x1, 0x1, 0x1, 0x1, 0x1},
wantOffsets: []tokenizers.Offset{{0x0, 0x5}, {0x6, 0x9}, {0xa, 0xf}, {0x10, 0x14}, {0x15, 0x18}, {0x19, 0x1d}, {0x1e, 0x21}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
encoding := tk.EncodeWithOptions(tt.str, tt.addSpecial)
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, []uint32(nil), encoding.TypeIDs, "wrong type ids")
assert.Equal(t, []string(nil), encoding.Tokens, "wrong tokens")
assert.Equal(t, []uint32(nil), encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, []uint32(nil), encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, []tokenizers.Offset(nil), encoding.Offsets, "wrong offsets")
encoding = tk.EncodeWithOptions(tt.str, tt.addSpecial, tokenizers.WithReturnTokens())
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, []uint32(nil), encoding.TypeIDs, "wrong type ids")
assert.Equal(t, tt.wantTokens, encoding.Tokens, "wrong tokens")
assert.Equal(t, []uint32(nil), encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, []uint32(nil), encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, []tokenizers.Offset(nil), encoding.Offsets, "wrong offsets")
encoding = tk.EncodeWithOptions(tt.str, tt.addSpecial, tokenizers.WithReturnTypeIDs())
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, tt.wantTypeIDs, encoding.TypeIDs, "wrong type ids")
assert.Equal(t, []string(nil), encoding.Tokens, "wrong tokens")
assert.Equal(t, []uint32(nil), encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, []uint32(nil), encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, []tokenizers.Offset(nil), encoding.Offsets, "wrong offsets")
encoding = tk.EncodeWithOptions(tt.str, tt.addSpecial, tokenizers.WithReturnSpecialTokensMask())
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, []uint32(nil), encoding.TypeIDs, "wrong type ids")
assert.Equal(t, []string(nil), encoding.Tokens, "wrong tokens")
assert.Equal(t, tt.wantSpecialTokensMask, encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, []uint32(nil), encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, []tokenizers.Offset(nil), encoding.Offsets, "wrong offsets")
encoding = tk.EncodeWithOptions(tt.str, tt.addSpecial, tokenizers.WithReturnAttentionMask())
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, []uint32(nil), encoding.TypeIDs, "wrong type ids")
assert.Equal(t, []string(nil), encoding.Tokens, "wrong tokens")
assert.Equal(t, []uint32(nil), encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, tt.wantAttentionMask, encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, []tokenizers.Offset(nil), encoding.Offsets, "wrong offsets")
encoding = tk.EncodeWithOptions(tt.str, tt.addSpecial, tokenizers.WithReturnOffsets())
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, []uint32(nil), encoding.TypeIDs, "wrong type ids")
assert.Equal(t, []string(nil), encoding.Tokens, "wrong tokens")
assert.Equal(t, []uint32(nil), encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, []uint32(nil), encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, tt.wantOffsets, encoding.Offsets, "wrong offsets")
})
}
}
func TestEncodeWithTruncation(t *testing.T) {
tests := []struct {
name string
str string
addSpecial bool
maxLen int
dir tokenizers.TruncationDirection
wantIDs []uint32
wantTokens []string
}{
{
name: "without special tokens, left truncation",
str: "brown fox jumps over the lazy dog",
addSpecial: false,
maxLen: 5,
dir: tokenizers.TruncationDirectionLeft,
wantIDs: []uint32{0x5185b, 0x3c54, 0x3a89, 0x35fc3, 0x57b4},
wantTokens: []string{"jumps", "over", "the", "lazy", "dog"},
},
{
name: "without special tokens, right truncation",
str: "brown fox jumps over the lazy dog",
addSpecial: false,
maxLen: 5,
dir: tokenizers.TruncationDirectionRight,
wantIDs: []uint32{0xca3f, 0x2f304, 0x5185b, 0x3c54, 0x3a89},
wantTokens: []string{"brown", "fox", "jumps", "over", "the"},
},
{
name: "with special tokens, left truncation",
str: "brown fox jumps over the lazy dog",
addSpecial: true,
maxLen: 5,
dir: tokenizers.TruncationDirectionLeft,
wantIDs: []uint32{0x65, 0x3a89, 0x35fc3, 0x57b4, 0x66},
wantTokens: []string{"[CLS]", "the", "lazy", "dog", "[SEP]"},
},
{
name: "with special tokens, right truncation",
str: "brown fox jumps over the lazy dog",
addSpecial: true,
maxLen: 5,
dir: tokenizers.TruncationDirectionRight,
wantIDs: []uint32{0x65, 0xca3f, 0x2f304, 0x5185b, 0x66},
wantTokens: []string{"[CLS]", "brown", "fox", "jumps", "[SEP]"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
tk, err := tokenizers.FromBytesWithTruncation(embeddedBytes, uint32(tt.maxLen), tt.dir)
require.NoError(t, err)
defer tk.Close()
ids, tokens := tk.Encode(tt.str, tt.addSpecial)
assert.Equal(t, tt.wantIDs, ids, "wrong ids")
assert.Equal(t, tt.wantTokens, tokens, "wrong tokens")
})
}
}
func TestEncodeWithPadding(t *testing.T) {
tk, err := tokenizers.FromFile("./test/data/all-minilm-l6-v2.json")
require.NoError(t, err)
defer tk.Close()
tests := []struct {
name string
str string
addSpecial bool
wantIDs []uint32
wantTypeIDs []uint32
wantTokens []string
wantSpecialTokensMask []uint32
wantAttentionMask []uint32
wantOffsets []tokenizers.Offset
}{
{
name: "sentence with padding",
str: "this short sentence",
addSpecial: false,
wantIDs: []uint32{0x7e7, 0x99c, 0x186b, 0x0, 0x0, 0x0, 0x0, 0x0},
wantTypeIDs: []uint32{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
wantTokens: []string{"this", "short", "sentence", "[PAD]", "[PAD]", "[PAD]", "[PAD]", "[PAD]"},
wantSpecialTokensMask: []uint32{0x0, 0x0, 0x0, 0x1, 0x1, 0x1, 0x1, 0x1},
wantAttentionMask: []uint32{0x1, 0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0},
wantOffsets: []tokenizers.Offset{{0x0, 0x4}, {0x5, 0xa}, {0xb, 0x13}, {0x0, 0x0}, {0x0, 0x0}, {0x0, 0x0}, {0x0, 0x0}, {0x0, 0x0}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
encoding := tk.EncodeWithOptions(tt.str, tt.addSpecial, tokenizers.WithReturnAllAttributes())
assert.Equal(t, tt.wantIDs, encoding.IDs, "wrong ids")
assert.Equal(t, tt.wantTypeIDs, encoding.TypeIDs, "wrong type ids")
assert.Equal(t, tt.wantTokens, encoding.Tokens, "wrong tokens")
assert.Equal(t, tt.wantSpecialTokensMask, encoding.SpecialTokensMask, "wrong special tokens mask")
assert.Equal(t, tt.wantAttentionMask, encoding.AttentionMask, "wrong attention mask")
assert.Equal(t, tt.wantOffsets, encoding.Offsets, "wrong offsets")
ids, tokens := tk.Encode(tt.str, tt.addSpecial)
assert.Equal(t, tt.wantIDs, ids, "wrong ids")
assert.Equal(t, tt.wantTokens, tokens, "wrong tokens")
})
}
}
func TestDecode(t *testing.T) {
tk, err := tokenizers.FromFile("./test/data/bert-base-uncased.json")
require.NoError(t, err)
defer tk.Close()
tests := []struct {
name string
tokens []uint32
skipSpecial bool
want string
}{
{
name: "without special tokens, skip special tokens",
tokens: []uint32{2829, 4419, 14523, 2058, 1996, 13971, 3899},
skipSpecial: true,
want: "brown fox jumps over the lazy dog",
},
{
name: "with special tokens, skip special tokens",
tokens: []uint32{101, 2829, 4419, 14523, 2058, 1996, 13971, 3899, 102},
skipSpecial: true,
want: "brown fox jumps over the lazy dog",
},
{
name: "without special tokens, don't skip special tokens",
tokens: []uint32{2829, 4419, 14523, 2058, 1996, 13971, 3899},
skipSpecial: false,
want: "brown fox jumps over the lazy dog",
},
{
name: "with special tokens, don't skip special tokens",
tokens: []uint32{101, 2829, 4419, 14523, 2058, 1996, 13971, 3899, 102},
skipSpecial: false,
want: "[CLS] brown fox jumps over the lazy dog [SEP]",
},
{
name: "no tokens",
tokens: []uint32{},
skipSpecial: false,
want: "",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := tk.Decode(tt.tokens, tt.skipSpecial)
assert.Equal(t, tt.want, got)
})
}
}
func TestDecodeInvalidString(t *testing.T) {
tk, err := tokenizers.FromFile("test/data/cohere-tokenizer.json")
require.NoError(t, err)
defer tk.Close()
str := tk.Decode([]uint32{196}, true)
assert.Empty(t, str)
}
func TestVocabSize(t *testing.T) {
tk, err := tokenizers.FromFile("./test/data/bert-base-uncased.json")
require.NoError(t, err)
defer tk.Close()
assert.Equal(t, uint32(30522), tk.VocabSize())
}
func BenchmarkEncodeNTimes(b *testing.B) {
tk, err := tokenizers.FromFile("./test/data/bert-base-uncased.json")
require.NoError(b, err)
defer tk.Close()
expected := []uint32{2829, 4419, 14523, 2058, 1996, 13971, 3899}
b.ResetTimer()
for i := 0; i < b.N; i++ {
ids, _ := tk.Encode("brown fox jumps over the lazy dog", false)
assert.Equal(b, expected, ids)
}
}
func BenchmarkEncodeNChars(b *testing.B) {
tk, err := tokenizers.FromFile("./test/data/bert-base-uncased.json")
require.NoError(b, err)
defer tk.Close()
vocabSize := tk.VocabSize()
input := make([]rune, 0, b.N)
for i := 0; i < b.N; i++ {
input = append(input, rune(rand.Uint32()%vocabSize))
}
str := string(input)
b.ResetTimer()
_, tokens := tk.Encode(str, false)
assert.Greater(b, len(tokens), 0)
}
func BenchmarkDecodeNTimes(b *testing.B) {
tk, err := tokenizers.FromFile("./test/data/bert-base-uncased.json")
require.NoError(b, err)
defer tk.Close()
b.ResetTimer()
for i := 0; i < b.N; i++ {
str := tk.Decode([]uint32{2829, 4419, 14523, 2058, 1996, 13971, 3899}, true)
assert.Equal(b, "brown fox jumps over the lazy dog", str)
}
}
func BenchmarkDecodeNTokens(b *testing.B) {
tk, err := tokenizers.FromFile("./test/data/bert-base-uncased.json")
require.NoError(b, err)
defer tk.Close()
vocabSize := tk.VocabSize()
input := make([]uint32, 0, b.N)
for i := 0; i < b.N; i++ {
input = append(input, rand.Uint32()%vocabSize)
}
b.ResetTimer()
text := tk.Decode(input, true)
// a token is one or more characters
assert.Greater(b, len(text), b.N)
}