proejct commit

tests/test_architecture.py

@@ -0,0 +1,60 @@
+"""Architektur-Tests: Die Physik-Schicht bleibt frei von pygame und fremden Bibliotheken.
+
+Anforderung: Die gesamte Physik darf nur das Standardmodul ``math`` verwenden
+(zusätzlich ``typing``/``dataclasses`` für Typangaben und Datenstrukturen). Diese Tests
+prüfen das statisch über den Syntaxbaum und zur Laufzeit in einem frischen Interpreter.
+"""
+
+import ast
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+SOURCE_ROOT = Path(__file__).resolve().parents[1] / "src" / "sandbox"
+PHYSICS_FILES = sorted((SOURCE_ROOT / "physics").glob("*.py"))
+PURE_FILES = [*PHYSICS_FILES, SOURCE_ROOT / "config.py"]
+
+ALLOWED_STDLIB = {"__future__", "math", "typing", "dataclasses"}
+ALLOWED_PROJECT = {"sandbox.config"}
+
+
+def _imported_modules(path: Path) -> set[str]:
+    tree = ast.parse(path.read_text(encoding="utf-8"))
+    modules: set[str] = set()
+    for node in ast.walk(tree):
+        if isinstance(node, ast.Import):
+            modules.update(alias.name for alias in node.names)
+        elif isinstance(node, ast.ImportFrom):
+            modules.add(node.module or "")
+    return modules
+
+
+@pytest.mark.parametrize("path", PURE_FILES, ids=lambda path: path.name)
+def test_physics_and_config_import_only_allowed_modules(path: Path) -> None:
+    forbidden = {
+        module
+        for module in _imported_modules(path)
+        if module not in ALLOWED_STDLIB
+        and module not in ALLOWED_PROJECT
+        and not module.startswith("sandbox.physics")
+    }
+    assert not forbidden, f"{path.name} importiert nicht erlaubte Module: {forbidden}"
+
+
+def test_physics_files_were_found() -> None:
+    assert len(PHYSICS_FILES) >= 8
+
+
+def test_importing_the_physics_package_does_not_load_pygame() -> None:
+    code = "import sys, sandbox.physics, sandbox.config; print('pygame' in sys.modules)"
+    result = subprocess.run(
+        [sys.executable, "-c", code],
+        capture_output=True,
+        text=True,
+        check=True,
+        env={**os.environ, "PYTHONPATH": str(SOURCE_ROOT.parent)},
+    )
+    assert result.stdout.strip() == "False"