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7971deb 332e663 7971deb 332e663 7971deb 332e663 7971deb 332e663 7971deb 332e663 7971deb | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 | """Tests for Bedrock region support and fallback model mapping.
Ensures that EU, AP, and US regions all produce valid Bedrock model IDs,
and that the proxy degrades gracefully when boto3 is unavailable or the
AWS API call fails.
"""
from unittest.mock import MagicMock, patch
import pytest
pytest.importorskip("litellm")
from headroom.backends.litellm import (
LiteLLMBackend,
_bedrock_profiles_cache,
_bedrock_region_prefix,
_build_bedrock_fallback_map,
_fetch_bedrock_inference_profiles,
_normalize_bedrock_profile_id,
)
# =============================================================================
# Region Prefix Mapping
# =============================================================================
class TestBedrockRegionPrefix:
"""Test AWS region -> inference profile prefix mapping."""
def test_us_regions(self):
assert _bedrock_region_prefix("us-east-1") == "us"
assert _bedrock_region_prefix("us-west-2") == "us"
def test_eu_regions(self):
assert _bedrock_region_prefix("eu-central-1") == "eu"
assert _bedrock_region_prefix("eu-west-1") == "eu"
assert _bedrock_region_prefix("eu-west-3") == "eu"
assert _bedrock_region_prefix("eu-north-1") == "eu"
def test_ap_regions(self):
assert _bedrock_region_prefix("ap-southeast-1") == "apac"
assert _bedrock_region_prefix("ap-northeast-1") == "apac"
def test_unknown_region_defaults_to_us(self):
assert _bedrock_region_prefix("me-south-1") == "us"
assert _bedrock_region_prefix("sa-east-1") == "us"
# =============================================================================
# Static Fallback Model Map
# =============================================================================
class TestBuildBedrockFallbackMap:
"""Test static fallback model map construction."""
def test_us_region_uses_us_prefix(self):
model_map = _build_bedrock_fallback_map("us-east-1")
assert "claude-sonnet-4-20250514" in model_map
assert model_map["claude-sonnet-4-20250514"] == (
"bedrock/us.anthropic.claude-sonnet-4-20250514-v1:0"
)
def test_eu_region_uses_eu_prefix(self):
model_map = _build_bedrock_fallback_map("eu-central-1")
assert "claude-sonnet-4-20250514" in model_map
assert model_map["claude-sonnet-4-20250514"] == (
"bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0"
)
def test_ap_region_uses_apac_prefix(self):
model_map = _build_bedrock_fallback_map("ap-southeast-1")
assert "claude-sonnet-4-20250514" in model_map
assert model_map["claude-sonnet-4-20250514"] == (
"bedrock/apac.anthropic.claude-sonnet-4-20250514-v1:0"
)
def test_all_models_present(self):
model_map = _build_bedrock_fallback_map("us-east-1")
expected_models = [
"claude-opus-4-6",
"claude-sonnet-4-6",
"claude-sonnet-4-20250514",
"claude-opus-4-20250514",
"claude-3-7-sonnet-20250219",
"claude-3-5-sonnet-20241022",
"claude-3-5-haiku-20241022",
"claude-3-opus-20240229",
"claude-3-haiku-20240307",
"claude-haiku-4-5-20251001",
]
for model in expected_models:
assert model in model_map, f"Missing model: {model}"
def test_all_values_are_valid_bedrock_format(self):
"""Every value must start with 'bedrock/' and contain 'anthropic.'."""
for region in ("us-east-1", "eu-west-1", "ap-northeast-1"):
model_map = _build_bedrock_fallback_map(region)
for name, litellm_id in model_map.items():
assert litellm_id.startswith("bedrock/"), (
f"{name}: expected bedrock/ prefix, got {litellm_id}"
)
assert "anthropic." in litellm_id, (
f"{name}: expected anthropic. in id, got {litellm_id}"
)
# =============================================================================
# Fetch with Graceful Fallback
# =============================================================================
class TestFetchBedrockInferenceProfiles:
"""Test dynamic fetch with fallback on failure."""
def setup_method(self):
"""Clear the cache before each test."""
_bedrock_profiles_cache.clear()
def test_fallback_when_boto3_import_fails(self):
"""Should return static map when boto3 is not installed."""
with patch.dict("sys.modules", {"boto3": None}):
# Force reimport failure
# Temporarily break boto3 import inside the function
original_import = (
__builtins__.__import__ if hasattr(__builtins__, "__import__") else __import__
)
def mock_import(name, *args, **kwargs):
if name == "boto3":
raise ImportError("No module named 'boto3'")
return original_import(name, *args, **kwargs)
with patch("builtins.__import__", side_effect=mock_import):
_bedrock_profiles_cache.clear()
result = _fetch_bedrock_inference_profiles("eu-central-1")
assert len(result) > 0
# Should use EU prefix
assert result["claude-sonnet-4-20250514"] == (
"bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0"
)
def test_fallback_when_api_call_fails(self):
"""Should return static map when list_inference_profiles raises."""
mock_boto3 = MagicMock()
mock_client = MagicMock()
mock_client.list_inference_profiles.side_effect = Exception(
"AccessDeniedException: not authorized"
)
mock_boto3.client.return_value = mock_client
with patch("headroom.backends.litellm.boto3", mock_boto3, create=True):
# Patch the import inside the function
_fetch_bedrock_inference_profiles.__code__ # noqa: B018
_bedrock_profiles_cache.clear()
# We need to actually test the function, so let's just use the
# mock_boto3 and make sure the function catches the exception
import builtins
real_import = builtins.__import__
def patched_import(name, *args, **kwargs):
if name == "boto3":
return mock_boto3
return real_import(name, *args, **kwargs)
with patch("builtins.__import__", side_effect=patched_import):
_bedrock_profiles_cache.clear()
result = _fetch_bedrock_inference_profiles("eu-west-1")
assert len(result) > 0
# Should use EU prefix
for litellm_id in result.values():
assert "eu.anthropic." in litellm_id
def test_successful_fetch_uses_api_results(self):
"""When API works, should use dynamic results (not fallback)."""
mock_boto3 = MagicMock()
mock_client = MagicMock()
mock_client.list_inference_profiles.return_value = {
"inferenceProfileSummaries": [
{"inferenceProfileId": "eu.anthropic.claude-sonnet-4-20250514-v1:0"},
{"inferenceProfileId": "eu.anthropic.claude-3-5-sonnet-20241022-v2:0"},
{"inferenceProfileId": "eu.meta.llama-3-70b-v1:0"}, # non-Anthropic, should skip
]
}
mock_boto3.client.return_value = mock_client
import builtins
real_import = builtins.__import__
def patched_import(name, *args, **kwargs):
if name == "boto3":
return mock_boto3
return real_import(name, *args, **kwargs)
with patch("builtins.__import__", side_effect=patched_import):
_bedrock_profiles_cache.clear()
result = _fetch_bedrock_inference_profiles("eu-central-1")
assert len(result) == 2
assert result["claude-sonnet-4-20250514"] == (
"bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0"
)
assert result["claude-3-5-sonnet-20241022"] == (
"bedrock/eu.anthropic.claude-3-5-sonnet-20241022-v2:0"
)
def test_caching_prevents_repeated_api_calls(self):
"""Second call for same region should return cached result."""
_bedrock_profiles_cache.clear()
_bedrock_profiles_cache["us-east-1"] = {"test": "bedrock/test-model"}
result = _fetch_bedrock_inference_profiles("us-east-1")
assert result == {"test": "bedrock/test-model"}
# =============================================================================
# LiteLLMBackend.map_model_id with EU Regions
# =============================================================================
class TestBedrockModelMapping:
"""Test model ID mapping for different regions."""
def setup_method(self):
_bedrock_profiles_cache.clear()
def test_eu_region_maps_correctly(self):
"""EU region should produce eu.anthropic.* model IDs."""
with patch(
"headroom.backends.litellm._fetch_bedrock_inference_profiles",
return_value={
"claude-sonnet-4-20250514": "bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0",
},
):
backend = LiteLLMBackend(provider="bedrock", region="eu-central-1")
result = backend.map_model_id("claude-sonnet-4-20250514")
assert result == "bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0"
def test_us_region_maps_correctly(self):
"""US region should produce us.anthropic.* model IDs."""
with patch(
"headroom.backends.litellm._fetch_bedrock_inference_profiles",
return_value={
"claude-sonnet-4-20250514": "bedrock/us.anthropic.claude-sonnet-4-20250514-v1:0",
},
):
backend = LiteLLMBackend(provider="bedrock", region="us-west-2")
result = backend.map_model_id("claude-sonnet-4-20250514")
assert result == "bedrock/us.anthropic.claude-sonnet-4-20250514-v1:0"
def test_fallback_for_unknown_model_in_eu(self):
"""Unknown models in EU should get eu.anthropic.* fallback, not bare 'bedrock/claude-...'."""
with patch(
"headroom.backends.litellm._fetch_bedrock_inference_profiles",
return_value={},
):
backend = LiteLLMBackend(provider="bedrock", region="eu-west-1")
result = backend.map_model_id("claude-sonnet-4-20250514")
assert result == "bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0"
def test_fallback_for_unknown_model_in_ap(self):
"""Unknown models in AP should get apac.anthropic.* fallback."""
with patch(
"headroom.backends.litellm._fetch_bedrock_inference_profiles",
return_value={},
):
backend = LiteLLMBackend(provider="bedrock", region="ap-southeast-1")
result = backend.map_model_id("claude-3-5-haiku-20241022")
assert result == "bedrock/apac.anthropic.claude-3-5-haiku-20241022-v1:0"
def test_bedrock_format_passthrough(self):
"""Already-formatted Bedrock IDs should pass through unchanged."""
with patch(
"headroom.backends.litellm._fetch_bedrock_inference_profiles",
return_value={},
):
backend = LiteLLMBackend(provider="bedrock", region="eu-central-1")
model = "bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0"
result = backend.map_model_id(model)
assert result == model
def test_anthropic_dot_format_normalized(self):
"""Raw Bedrock IDs like 'anthropic.claude-...-v1:0' should normalize and map."""
with patch(
"headroom.backends.litellm._fetch_bedrock_inference_profiles",
return_value={
"claude-sonnet-4-20250514": "bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0",
},
):
backend = LiteLLMBackend(provider="bedrock", region="eu-central-1")
result = backend.map_model_id("anthropic.claude-sonnet-4-20250514-v1:0")
assert result == "bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0"
def test_region_prefixed_format_normalized(self):
"""'eu.anthropic.claude-...-v1:0' should normalize and map."""
with patch(
"headroom.backends.litellm._fetch_bedrock_inference_profiles",
return_value={
"claude-sonnet-4-20250514": "bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0",
},
):
backend = LiteLLMBackend(provider="bedrock", region="eu-central-1")
result = backend.map_model_id("eu.anthropic.claude-sonnet-4-20250514-v1:0")
assert result == "bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0"
# =============================================================================
# Normalize Bedrock Profile ID (edge cases)
# =============================================================================
class TestNormalizeBedrockProfileId:
"""Test normalization of various Bedrock profile ID formats."""
def test_eu_prefixed(self):
assert _normalize_bedrock_profile_id("eu.anthropic.claude-sonnet-4-20250514-v1:0") == (
"claude-sonnet-4-20250514"
)
def test_apac_prefixed(self):
assert _normalize_bedrock_profile_id("apac.anthropic.claude-3-5-sonnet-20241022-v2:0") == (
"claude-3-5-sonnet-20241022"
)
def test_us_prefixed(self):
assert _normalize_bedrock_profile_id("us.anthropic.claude-opus-4-20250514-v1:0") == (
"claude-opus-4-20250514"
)
def test_no_region_prefix(self):
assert _normalize_bedrock_profile_id("anthropic.claude-3-haiku-20240307-v1:0") == (
"claude-3-haiku-20240307"
)
def test_with_bedrock_slash_prefix(self):
assert (
_normalize_bedrock_profile_id("bedrock/eu.anthropic.claude-sonnet-4-20250514-v1:0")
== "claude-sonnet-4-20250514"
)
def test_non_claude_returns_none(self):
assert _normalize_bedrock_profile_id("eu.meta.llama-3-70b-v1:0") is None
def test_already_normalized(self):
assert _normalize_bedrock_profile_id("claude-sonnet-4-20250514") == (
"claude-sonnet-4-20250514"
)
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