File size: 8,094 Bytes
a402b9b | 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 | from types import ModuleType
import pytest
from sglang.srt.debug_utils.source_patcher.code_patcher import (
CodePatcher,
_resolve_target,
patch_function,
)
from sglang.srt.debug_utils.source_patcher.types import EditSpec, PatchSpec
from sglang.test.ci.ci_register import register_cpu_ci
register_cpu_ci(est_time=10, suite="default", nightly=True)
SAMPLE_MODULE_NAME = "_source_patcher_test_fixtures.sample_module"
class TestPatchFunction:
def test_basic_patch_changes_behavior(self, sample_module: ModuleType) -> None:
cls = sample_module.SampleClass
obj = cls()
assert obj.greet("world") == "hello world"
state = patch_function(
target=cls.greet,
edits=[
EditSpec(
match='greeting = f"hello {name}"',
replacement='greeting = f"patched {name}"',
)
],
)
try:
assert obj.greet("world") == "patched world"
finally:
state.restore()
assert obj.greet("world") == "hello world"
def test_globals_preserved_after_patch(self, sample_module: ModuleType) -> None:
cls = sample_module.SampleClass
obj = cls()
assert obj.uses_global() == "value=global_value"
state = patch_function(
target=cls.uses_global,
edits=[
EditSpec(
match='return f"value={GLOBAL_VAR}"',
replacement='return f"patched_value={GLOBAL_VAR}"',
)
],
)
try:
assert obj.uses_global() == "patched_value=global_value"
finally:
state.restore()
def test_function_identity_preserved(self, sample_module: ModuleType) -> None:
cls = sample_module.SampleClass
fn_id_before = id(cls.greet)
state = patch_function(
target=cls.greet,
edits=[
EditSpec(
match='greeting = f"hello {name}"',
replacement='greeting = f"patched {name}"',
)
],
)
try:
assert id(cls.greet) == fn_id_before
finally:
state.restore()
def test_patch_standalone_function(self, sample_module: ModuleType) -> None:
fn = sample_module.standalone_function
assert fn(2, 3) == 5
state = patch_function(
target=fn,
edits=[
EditSpec(
match="return a + b",
replacement="return a * b",
)
],
)
try:
assert fn(2, 3) == 6
finally:
state.restore()
assert fn(2, 3) == 5
def test_patched_code_can_reference_global_variable(
self, sample_module: ModuleType
) -> None:
"""Replacement code that references a module-level global should work."""
cls = sample_module.SampleClass
obj = cls()
state = patch_function(
target=cls.greet,
edits=[
EditSpec(
match='greeting = f"hello {name}"',
replacement='greeting = f"{GLOBAL_VAR} {name}"',
)
],
)
try:
assert obj.greet("world") == "global_value world"
finally:
state.restore()
def test_patched_code_can_call_another_class_method(
self, sample_module: ModuleType
) -> None:
"""Replacement code that calls HelperClass.format_value should work."""
cls = sample_module.SampleClass
obj = cls()
state = patch_function(
target=cls.greet,
edits=[
EditSpec(
match='greeting = f"hello {name}"',
replacement="greeting = HelperClass.format_value(name)",
)
],
)
try:
assert obj.greet("world") == "[world]"
finally:
state.restore()
def test_patched_code_uses_helper_via_existing_method(
self, sample_module: ModuleType
) -> None:
"""The uses_helper method already calls HelperClass; verify it survives patching."""
cls = sample_module.SampleClass
obj = cls()
assert obj.uses_helper("test") == "[test]"
state = patch_function(
target=cls.uses_helper,
edits=[
EditSpec(
match="return HelperClass.format_value(value)",
replacement='return HelperClass.format_value("patched_" + value)',
)
],
)
try:
assert obj.uses_helper("test") == "[patched_test]"
finally:
state.restore()
assert obj.uses_helper("test") == "[test]"
class TestResolveTarget:
def test_resolve_class_method(self, sample_module: ModuleType) -> None:
target = _resolve_target(f"{SAMPLE_MODULE_NAME}.SampleClass.greet")
assert target is sample_module.SampleClass.greet
def test_resolve_standalone_function(self, sample_module: ModuleType) -> None:
target = _resolve_target(f"{SAMPLE_MODULE_NAME}.standalone_function")
assert target is sample_module.standalone_function
def test_resolve_nonexistent_raises(self, sample_module: ModuleType) -> None:
with pytest.raises((ImportError, AttributeError)):
_resolve_target(f"{SAMPLE_MODULE_NAME}.NonexistentClass.method")
class TestCodePatcher:
def test_context_manager_patches_and_restores(
self, sample_module: ModuleType
) -> None:
cls = sample_module.SampleClass
obj = cls()
assert obj.greet("world") == "hello world"
patches = [
PatchSpec(
target=f"{SAMPLE_MODULE_NAME}.SampleClass.greet",
edits=[
EditSpec(
match='greeting = f"hello {name}"',
replacement='greeting = f"ctx_patched {name}"',
)
],
)
]
with CodePatcher(patches=patches):
assert obj.greet("world") == "ctx_patched world"
assert obj.greet("world") == "hello world"
def test_context_manager_multiple_patches(self, sample_module: ModuleType) -> None:
cls = sample_module.SampleClass
obj = cls()
patches = [
PatchSpec(
target=f"{SAMPLE_MODULE_NAME}.SampleClass.greet",
edits=[
EditSpec(
match='greeting = f"hello {name}"',
replacement='greeting = f"p1 {name}"',
)
],
),
PatchSpec(
target=f"{SAMPLE_MODULE_NAME}.SampleClass.compute",
edits=[
EditSpec(
match="result = x * 2 + 1",
replacement="result = x * 100",
)
],
),
]
with CodePatcher(patches=patches):
assert obj.greet("world") == "p1 world"
assert obj.compute(5) == 500
assert obj.greet("world") == "hello world"
assert obj.compute(5) == 11
def test_restores_on_exception(self, sample_module: ModuleType) -> None:
cls = sample_module.SampleClass
obj = cls()
patches = [
PatchSpec(
target=f"{SAMPLE_MODULE_NAME}.SampleClass.greet",
edits=[
EditSpec(
match='greeting = f"hello {name}"',
replacement='greeting = f"err_patched {name}"',
)
],
)
]
with pytest.raises(RuntimeError):
with CodePatcher(patches=patches):
assert obj.greet("world") == "err_patched world"
raise RuntimeError("test error")
assert obj.greet("world") == "hello world"
|