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test_encoding.py
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# Note that there are more actual tests, they're just not currently public :-)
from typing import Callable
import hypothesis
import hypothesis.strategies as st
import pytest
import tiktoken
from .test_helpers import ENCODING_FACTORIES, MAX_EXAMPLES
def test_simple():
enc = tiktoken.get_encoding("gpt2")
assert enc.encode("hello world") == [31373, 995]
assert enc.decode([31373, 995]) == "hello world"
assert enc.encode("hello <|endoftext|>", allowed_special="all") == [31373, 220, 50256]
enc = tiktoken.get_encoding("cl100k_base")
assert enc.encode("hello world") == [15339, 1917]
assert enc.decode([15339, 1917]) == "hello world"
assert enc.encode("hello <|endoftext|>", allowed_special="all") == [15339, 220, 100257]
for enc_name in tiktoken.list_encoding_names():
enc = tiktoken.get_encoding(enc_name)
for token in range(10_000):
assert enc.encode_single_token(enc.decode_single_token_bytes(token)) == token
def test_simple_repeated():
enc = tiktoken.get_encoding("gpt2")
assert enc.encode("0") == [15]
assert enc.encode("00") == [405]
assert enc.encode("000") == [830]
assert enc.encode("0000") == [2388]
assert enc.encode("00000") == [20483]
assert enc.encode("000000") == [10535]
assert enc.encode("0000000") == [24598]
assert enc.encode("00000000") == [8269]
assert enc.encode("000000000") == [10535, 830]
assert enc.encode("0000000000") == [8269, 405]
assert enc.encode("00000000000") == [8269, 830]
assert enc.encode("000000000000") == [8269, 2388]
assert enc.encode("0000000000000") == [8269, 20483]
assert enc.encode("00000000000000") == [8269, 10535]
assert enc.encode("000000000000000") == [8269, 24598]
assert enc.encode("0000000000000000") == [25645]
assert enc.encode("00000000000000000") == [8269, 10535, 830]
def test_simple_regex():
enc = tiktoken.get_encoding("cl100k_base")
assert enc.encode("rer") == [38149]
assert enc.encode("'rer") == [2351, 81]
assert enc.encode("today\n ") == [31213, 198, 220]
assert enc.encode("today\n \n") == [31213, 27907]
assert enc.encode("today\n \n") == [31213, 14211]
def test_basic_encode():
enc = tiktoken.get_encoding("r50k_base")
assert enc.encode("hello world") == [31373, 995]
assert enc.encode("a" * 1000) == [24794] * 250
enc = tiktoken.get_encoding("p50k_base")
assert enc.encode("hello world") == [31373, 995]
assert enc.encode("a" * 1000) == [24794] * 250
enc = tiktoken.get_encoding("cl100k_base")
assert enc.encode("hello world") == [15339, 1917]
assert enc.encode(" \x850") == [220, 126, 227, 15]
assert enc.encode("a" * 1000) == [70540] * 125
def test_encode_empty():
enc = tiktoken.get_encoding("r50k_base")
assert enc.encode("") == []
def test_encode_bytes():
enc = tiktoken.get_encoding("cl100k_base")
assert enc._encode_bytes(b" \xec\x8b\xa4\xed") == [62085]
def test_encode_surrogate_pairs():
enc = tiktoken.get_encoding("cl100k_base")
assert enc.encode("👍") == [9468, 239, 235]
# surrogate pair gets converted to codepoint
assert enc.encode("\ud83d\udc4d") == [9468, 239, 235]
# lone surrogate just gets replaced
assert enc.encode("\ud83d") == enc.encode("�")
# ====================
# Roundtrip
# ====================
@pytest.mark.parametrize("make_enc", ENCODING_FACTORIES)
def test_basic_roundtrip(make_enc):
enc = make_enc()
for value in (
"hello",
"hello ",
"hello ",
" hello",
" hello ",
" hello ",
"hello world",
"请考试我的软件！12345",
):
assert value == enc.decode(enc.encode(value))
assert value == enc.decode(enc.encode_ordinary(value))
@pytest.mark.parametrize("make_enc", ENCODING_FACTORIES)
@hypothesis.given(text=st.text())
@hypothesis.settings(deadline=None)
def test_hyp_roundtrip(make_enc: Callable[[], tiktoken.Encoding], text):
enc = make_enc()
assert text == enc.decode(enc.encode(text))
@pytest.mark.parametrize("make_enc", ENCODING_FACTORIES)
def test_single_token_roundtrip(make_enc: Callable[[], tiktoken.Encoding]):
enc = make_enc()
for token in range(enc.n_vocab):
try:
token_bytes = enc.decode_single_token_bytes(token)
except KeyError:
continue
assert enc.encode_single_token(token_bytes) == token
# ====================
# Special tokens
# ====================
def test_special_token():
enc = tiktoken.get_encoding("cl100k_base")
eot = enc.encode_single_token("<|endoftext|>")
assert eot == enc.eot_token
fip = enc.encode_single_token("<|fim_prefix|>")
fim = enc.encode_single_token("<|fim_middle|>")
text = "<|endoftext|> hello <|fim_prefix|>"
assert eot not in enc.encode(text, disallowed_special=())
with pytest.raises(ValueError):
enc.encode(text)
with pytest.raises(ValueError):
enc.encode(text, disallowed_special="all")
with pytest.raises(ValueError):
enc.encode(text, disallowed_special={"<|endoftext|>"})
with pytest.raises(ValueError):
enc.encode(text, disallowed_special={"<|fim_prefix|>"})
text = "<|endoftext|> hello <|fim_prefix|> there <|fim_middle|>"
tokens = enc.encode(text, disallowed_special=())
assert eot not in tokens
assert fip not in tokens
assert fim not in tokens
tokens = enc.encode(text, allowed_special="all", disallowed_special=())
assert eot in tokens
assert fip in tokens
assert fim in tokens
tokens = enc.encode(text, allowed_special="all", disallowed_special="all")
assert eot in tokens
assert fip in tokens
assert fim in tokens
tokens = enc.encode(text, allowed_special={"<|fim_prefix|>"}, disallowed_special=())
assert eot not in tokens
assert fip in tokens
assert fim not in tokens
tokens = enc.encode(text, allowed_special={"<|endoftext|>"}, disallowed_special=())
assert eot in tokens
assert fip not in tokens
assert fim not in tokens
tokens = enc.encode(text, allowed_special={"<|fim_middle|>"}, disallowed_special=())
assert eot not in tokens
assert fip not in tokens
assert fim in tokens
@pytest.mark.parametrize("make_enc", ENCODING_FACTORIES)
@hypothesis.given(text=st.text())
@hypothesis.settings(deadline=None, max_examples=MAX_EXAMPLES)
def test_hyp_special_ordinary(make_enc, text: str):
enc = make_enc()
assert enc.encode_ordinary(text) == enc.encode(text, disallowed_special=())
# ====================
# Batch encoding
# ====================
@pytest.mark.parametrize("make_enc", ENCODING_FACTORIES)
def test_batch_encode(make_enc: Callable[[], tiktoken.Encoding]):
enc = make_enc()
text1 = "hello world"
text2 = "goodbye world"
assert enc.encode_batch([text1]) == [enc.encode(text1)]
assert enc.encode_batch([text1, text2]) == [enc.encode(text1), enc.encode(text2)]
assert enc.encode_ordinary_batch([text1]) == [enc.encode_ordinary(text1)]
assert enc.encode_ordinary_batch([text1, text2]) == [
enc.encode_ordinary(text1),
enc.encode_ordinary(text2),
]
@pytest.mark.parametrize("make_enc", ENCODING_FACTORIES)
@hypothesis.given(batch=st.lists(st.text()))
@hypothesis.settings(deadline=None)
def test_hyp_batch_roundtrip(make_enc: Callable[[], tiktoken.Encoding], batch):
enc = make_enc()
encoded = enc.encode_batch(batch)
assert encoded == [enc.encode(t) for t in batch]
decoded = enc.decode_batch(encoded)
assert decoded == batch