[TMP] Feature Preview

e2e_projects/hot_fork_basic/pyproject.toml

@@ -0,0 +1,14 @@
+[project]
+name = "hf-calc"
+version = "0.1.0"
+requires-python = ">=3.10"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.mutmut]
+process_isolation = "hot-fork"
+
+[tool.pytest.ini_options]
+asyncio_default_fixture_loop_scope = "function"

e2e_projects/hot_fork_basic/src/hf_calc/__init__.py

@@ -0,0 +1,14 @@
+def add(a, b):
+    return a + b
+
+
+def sub(a, b):
+    return a - b
+
+
+def mul(a, b):
+    return a * b
+
+
+def untested(x):
+    return x + 1

e2e_projects/hot_fork_basic/tests/test_hf_calc.py

@@ -0,0 +1,15 @@
+from hf_calc import add
+from hf_calc import mul
+from hf_calc import sub
+
+
+def test_add():
+    assert add(1, 2) == 3
+
+
+def test_sub():
+    assert sub(5, 2) == 3
+
+
+def test_mul():
+    assert mul(3, 4) == 12

src/mutmut/__init__.py

@@ -2,43 +2,46 @@
 
 import importlib.metadata
 import warnings
-from collections import defaultdict
 
-from mutmut.configuration import Config
+from mutmut.configuration import config
+from mutmut.configuration import reset_config
 from mutmut.state import reset_state
+from mutmut.state import state
 
 __version__ = importlib.metadata.version("mutmut")
 
 
-stats_time: float | None = None
-duration_by_test: dict[str, float] = defaultdict(float)
-tests_by_mangled_function_name: dict[str, set[str]] = defaultdict(set)
-
-_stats: set[str] = set()
-_covered_lines: dict[str, set[int]] | None = None
+_DEPRECATED_STATE_ATTRS = frozenset(
+    {
+        "stats_time",
+        "duration_by_test",
+        "tests_by_mangled_function_name",
+        "_stats",
+        "_covered_lines",
+    }
+)
 
 
 def __getattr__(name: str) -> object:
     match name:
         case "config":
             warnings.warn(
-                "mutmut.config is deprecated as of 3.4.1, use mutmut.configuration.Config.get() instead",
+                "mutmut.config is deprecated as of 3.4.1, use mutmut.configuration.config() instead",
+                FutureWarning,
+                stacklevel=2,
+            )
+            return config()
+        case name if name in _DEPRECATED_STATE_ATTRS:
+            warnings.warn(
+                f"mutmut.{name} is deprecated, use mutmut.state.state().{name} instead",
                 FutureWarning,
                 stacklevel=2,
             )
-            return Config.get()
+            return getattr(state(), name)
         case _:
             raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
 
 
 def _reset_globals() -> None:
-    global duration_by_test, stats_time, _stats, tests_by_mangled_function_name
-    global _covered_lines
-
-    duration_by_test.clear()
-    stats_time = None
-    Config.reset()
-    _stats = set()
-    tests_by_mangled_function_name = defaultdict(set)
-    _covered_lines = None
+    reset_config()
     reset_state()