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31aa72c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 | """Tests for UniversalCompressor."""
import json
import pytest
from headroom.compression.detector import ContentType
from headroom.compression.handlers.base import NoOpHandler
from headroom.compression.universal import (
CompressionResult,
UniversalCompressor,
UniversalCompressorConfig,
compress,
)
class TestUniversalCompressorConfig:
"""Tests for UniversalCompressorConfig."""
def test_default_config(self):
"""Test default configuration values."""
config = UniversalCompressorConfig()
assert config.use_magika is True
assert config.use_llmlingua is True
assert config.use_entropy_preservation is True
assert config.entropy_threshold == 0.85
assert config.min_content_length == 100
assert config.compression_ratio_target == 0.3
def test_custom_config(self):
"""Test custom configuration."""
config = UniversalCompressorConfig(
use_magika=False,
compression_ratio_target=0.5,
)
assert config.use_magika is False
assert config.compression_ratio_target == 0.5
class TestCompressionResult:
"""Tests for CompressionResult."""
def test_tokens_saved(self):
"""Test tokens_saved calculation."""
result = CompressionResult(
compressed="short",
original="much longer original content",
compression_ratio=0.5,
tokens_before=100,
tokens_after=50,
content_type=ContentType.TEXT,
detection_confidence=0.9,
handler_used="test",
preservation_ratio=0.5,
)
assert result.tokens_saved == 50
def test_savings_percentage(self):
"""Test savings_percentage calculation."""
result = CompressionResult(
compressed="short",
original="longer",
compression_ratio=0.5,
tokens_before=100,
tokens_after=25,
content_type=ContentType.TEXT,
detection_confidence=0.9,
handler_used="test",
preservation_ratio=0.5,
)
assert result.savings_percentage == 75.0
def test_zero_tokens_before(self):
"""Test handling of zero tokens_before."""
result = CompressionResult(
compressed="",
original="",
compression_ratio=1.0,
tokens_before=0,
tokens_after=0,
content_type=ContentType.UNKNOWN,
detection_confidence=0.0,
handler_used="none",
preservation_ratio=1.0,
)
assert result.savings_percentage == 0.0
class TestUniversalCompressor:
"""Tests for UniversalCompressor."""
@pytest.fixture
def compressor(self):
"""Create compressor with fallback detector (no Magika required)."""
config = UniversalCompressorConfig(
use_magika=False, # Use fallback detector
use_llmlingua=False, # Use simple compression
ccr_enabled=False, # Skip CCR
)
return UniversalCompressor(config=config)
def test_compress_short_content_unchanged(self, compressor):
"""Test that short content is not compressed."""
content = "short"
result = compressor.compress(content)
assert result.compressed == content
assert result.compression_ratio == 1.0
assert "skipped" in result.metadata
def test_compress_empty_content(self, compressor):
"""Test handling of empty content."""
result = compressor.compress("")
assert result.compressed == ""
assert result.content_type == ContentType.UNKNOWN
def test_compress_json_content(self, compressor):
"""Test compression of JSON content."""
content = json.dumps(
{"users": [{"id": i, "name": f"User {i}", "bio": "x" * 100} for i in range(10)]}
)
result = compressor.compress(content)
assert result.content_type == ContentType.JSON
assert result.handler_used == "json"
# Compression should reduce size
assert len(result.compressed) < len(content)
def test_compress_code_content(self, compressor):
"""Test compression of code content."""
content = (
'''
def hello_world():
"""Say hello to the world."""
message = "Hello, World!"
print(message)
return message
def another_function():
"""Another function with a long body."""
x = 1
y = 2
z = x + y
'''
+ "result = z * " * 50
+ """
return result
"""
)
result = compressor.compress(content)
assert result.content_type == ContentType.CODE
assert result.handler_used == "code"
def test_compress_plain_text(self, compressor):
"""Test compression of plain text."""
content = "This is plain text without any special structure. " * 20
result = compressor.compress(content)
assert result.content_type == ContentType.TEXT
def test_compress_with_override_type(self, compressor):
"""Test compression with overridden content type."""
content = '{"key": "value"}' + " " * 100 # Pad to meet min length
result = compressor.compress(content, content_type=ContentType.TEXT)
# Should use TEXT even though it looks like JSON
assert result.content_type == ContentType.TEXT
def test_compression_result_has_metadata(self, compressor):
"""Test that result includes metadata."""
content = json.dumps({"items": [{"id": i} for i in range(20)]})
result = compressor.compress(content)
assert "detection" in result.metadata
assert "handler" in result.metadata
def test_register_custom_handler(self, compressor):
"""Test registering a custom handler."""
custom_handler = NoOpHandler()
compressor.register_handler(ContentType.JSON, custom_handler)
content = '{"key": "value"}' + " " * 100
result = compressor.compress(content)
# Should use our custom handler
assert result.handler_used == "noop"
def test_get_handler(self, compressor):
"""Test getting handler for content type."""
json_handler = compressor.get_handler(ContentType.JSON)
assert json_handler is not None
assert json_handler.name == "json"
unknown_handler = compressor.get_handler(ContentType.UNKNOWN)
assert unknown_handler.name == "noop"
class TestUniversalCompressorBatch:
"""Tests for batch compression."""
@pytest.fixture
def compressor(self):
"""Create compressor with fallback detector."""
config = UniversalCompressorConfig(
use_magika=False,
use_llmlingua=False,
ccr_enabled=False,
)
return UniversalCompressor(config=config)
def test_compress_batch_empty(self, compressor):
"""Test batch compression with empty list."""
results = compressor.compress_batch([])
assert results == []
def test_compress_batch_mixed_content(self, compressor):
"""Test batch compression with mixed content types."""
contents = [
json.dumps({"id": 1, "data": "x" * 100}),
"def foo(): pass\n" * 10,
"Plain text content " * 10,
]
results = compressor.compress_batch(contents)
assert len(results) == 3
assert results[0].content_type == ContentType.JSON
assert results[1].content_type == ContentType.CODE
assert results[2].content_type == ContentType.TEXT
class TestCompressFunction:
"""Tests for the convenience compress function."""
def test_compress_function(self):
"""Test one-off compression function."""
content = json.dumps({"items": [{"id": i} for i in range(20)]})
result = compress(content)
assert isinstance(result, CompressionResult)
assert result.content_type == ContentType.JSON
class TestStructurePreservation:
"""Integration tests for structure preservation."""
@pytest.fixture
def compressor(self):
"""Create compressor."""
config = UniversalCompressorConfig(
use_magika=False,
use_llmlingua=False,
ccr_enabled=False,
)
return UniversalCompressor(config=config)
def test_json_keys_preserved(self, compressor):
"""Test that JSON keys are visible after compression."""
data = {
"user_id": "12345",
"user_name": "Alice",
"user_email": "alice@example.com",
"user_bio": "A very long biography that goes on and on " * 10,
}
content = json.dumps(data)
result = compressor.compress(content)
# All keys should be visible in compressed output
for key in data.keys():
assert key in result.compressed, f"Key {key} should be in compressed output"
def test_code_signatures_preserved(self, compressor):
"""Test that code signatures are visible after compression."""
content = (
'''
def calculate_total(items, tax_rate=0.1):
"""Calculate total with tax."""
subtotal = sum(item.price for item in items)
tax = subtotal * tax_rate
total = subtotal + tax
'''
+ "# padding " * 50
+ '''
return total
class ShoppingCart:
"""Shopping cart implementation."""
def __init__(self):
self.items = []
'''
+ "# more padding " * 30
+ '''
def add_item(self, item):
"""Add item to cart."""
self.items.append(item)
'''
)
result = compressor.compress(content)
# Function and class names should be visible
assert "calculate_total" in result.compressed
assert "ShoppingCart" in result.compressed
assert "add_item" in result.compressed
def test_compression_reduces_tokens(self, compressor):
"""Test that compression actually reduces token count."""
# Large content that should be compressible
data = {
"results": [
{
"id": i,
"title": f"Result {i}",
"description": f"This is a detailed description for result {i}. " * 5,
}
for i in range(50)
]
}
content = json.dumps(data)
result = compressor.compress(content)
# Should achieve some compression
assert result.tokens_after < result.tokens_before
assert result.compression_ratio < 1.0
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