127 lines
3.5 KiB
Python
127 lines
3.5 KiB
Python
import json
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import os
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import tempfile
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import pytest
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import safetensors.torch as st
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import torch
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from astrai.config.model_config import EncoderConfig
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from astrai.model.automodel import AutoModel
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from astrai.model.encoder import EmbeddingEncoder
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TINY_CONFIG = dict(
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vocab_size=128,
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dim=8,
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n_heads=2,
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n_kv_heads=1,
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dim_ffn=16,
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max_len=64,
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n_layers=2,
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norm_eps=1e-5,
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)
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_device = "cuda" if torch.cuda.is_available() else "cpu"
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def _make_model(**kwargs):
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config = EncoderConfig(**{**TINY_CONFIG, **kwargs})
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return EmbeddingEncoder(config).to(device=_device)
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@pytest.mark.parametrize("pooling_type", ["mean", "cls", "last"])
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def test_encoder_forward_pooling(pooling_type):
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model = _make_model(pooling_type=pooling_type)
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model.eval()
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batch_size, seq_len = 2, 8
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input_ids = torch.randint(
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0, TINY_CONFIG["vocab_size"], (batch_size, seq_len), device=_device
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)
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with torch.no_grad():
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output = model(input_ids)
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assert output.shape == (batch_size, TINY_CONFIG["dim"])
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assert not torch.isnan(output).any()
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def test_encoder_forward_with_padding():
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model = _make_model()
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model.eval()
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batch_size, seq_len = 2, 8
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input_ids = torch.randint(
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0, TINY_CONFIG["vocab_size"], (batch_size, seq_len), device=_device
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)
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input_mask = torch.ones(batch_size, seq_len, dtype=torch.bool, device=_device)
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input_mask[:, 4:] = False
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with torch.no_grad():
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output = model(input_ids, input_mask=input_mask)
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assert output.shape == (batch_size, TINY_CONFIG["dim"])
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assert not torch.isnan(output).any()
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def test_encoder_normalize():
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model = _make_model(pooling_type="mean", normalize_embeddings=True)
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model.eval()
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batch_size, seq_len = 2, 8
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input_ids = torch.randint(
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0, TINY_CONFIG["vocab_size"], (batch_size, seq_len), device=_device
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)
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with torch.no_grad():
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output = model(input_ids)
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norms = output.norm(p=2, dim=-1)
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assert torch.allclose(norms, torch.ones_like(norms), atol=1e-4)
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def test_encoder_register():
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assert AutoModel.is_registered("embedding")
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cls = AutoModel.get_component_class("embedding")
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assert cls is EmbeddingEncoder
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def test_encoder_from_transformer_checkpoint():
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model = _make_model()
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state_dict = model.state_dict()
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state_dict["lm_head.weight"] = torch.randn(
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TINY_CONFIG["vocab_size"], TINY_CONFIG["dim"], device=_device
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)
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new_model = _make_model()
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new_model.load_state_dict(state_dict, strict=True)
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for key in model.state_dict():
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assert torch.equal(new_model.state_dict()[key], model.state_dict()[key])
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def test_encoder_save_load():
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test_dir = tempfile.mkdtemp(prefix="encoder_test_")
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config_path = os.path.join(test_dir, "config.json")
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weights_path = os.path.join(test_dir, "model.safetensors")
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try:
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config_data = {**TINY_CONFIG, "pooling_type": "mean"}
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with open(config_path, "w") as f:
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json.dump(config_data, f)
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config = EncoderConfig.from_file(config_path)
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original = EmbeddingEncoder(config)
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st.save_file(original.state_dict(), weights_path)
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loaded = EmbeddingEncoder(config)
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loaded.load_state_dict(st.load_file(weights_path))
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for key in original.state_dict():
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assert torch.equal(original.state_dict()[key], loaded.state_dict()[key])
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finally:
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if os.path.exists(test_dir):
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for f in os.listdir(test_dir):
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os.remove(os.path.join(test_dir, f))
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os.rmdir(test_dir)
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