Tests: Add automated testing framework with coverage support

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/framework/collector.py

@@ -0,0 +1,60 @@
+import sys
+from pathlib import Path
+
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
+from .bpf_test_case import BpfTestCase
+
+TESTS_DIR = Path(__file__).parent.parent
+CONFIG_FILE = TESTS_DIR / "test_config.toml"
+
+VMLINUX_TEST_DIRS = {"passing_tests/vmlinux"}
+VMLINUX_TEST_PREFIXES = {
+    "failing_tests/vmlinux",
+    "failing_tests/xdp",
+}
+
+
+def _is_vmlinux_test(rel_path: str) -> bool:
+    for prefix in VMLINUX_TEST_DIRS | VMLINUX_TEST_PREFIXES:
+        if rel_path.startswith(prefix):
+            return True
+    return False
+
+
+def _load_config() -> dict:
+    if not CONFIG_FILE.exists():
+        return {}
+    with open(CONFIG_FILE, "rb") as f:
+        return tomllib.load(f)
+
+
+def collect_all_test_files() -> list[BpfTestCase]:
+    config = _load_config()
+    xfail_map: dict = config.get("xfail", {})
+
+    cases = []
+    for subdir in ("passing_tests", "failing_tests"):
+        for py_file in sorted((TESTS_DIR / subdir).rglob("*.py")):
+            rel = str(py_file.relative_to(TESTS_DIR))
+            needs_vmlinux = _is_vmlinux_test(rel)
+
+            xfail_entry = xfail_map.get(rel)
+            is_expected_fail = xfail_entry is not None
+            xfail_reason = xfail_entry.get("reason", "") if xfail_entry else ""
+            xfail_level = xfail_entry.get("level", "ir") if xfail_entry else "ir"
+
+            cases.append(
+                BpfTestCase(
+                    path=py_file,
+                    rel_path=rel,
+                    is_expected_fail=is_expected_fail,
+                    xfail_reason=xfail_reason,
+                    xfail_level=xfail_level,
+                    needs_vmlinux=needs_vmlinux,
+                )
+            )
+    return cases