[GEMINI] Refactor tests to use Config class and autouse test isolation fixture

tests/conftest.py

@@ -0,0 +1,27 @@
+# tests/conftest.py
+import pytest
+import toml
+from pathlib import Path
+
+@pytest.fixture(autouse=True)
+def setup_test_config(tmp_path, monkeypatch):
+    """Autouse fixture to isolate test runs from the real config.toml."""
+    test_config = tmp_path / "config.toml"
+    default_data = {
+        "Competition": {
+            "competition": "picoctf",
+            "catagory": "textCat",
+            "challenge": "testChal",
+            "flag_format": r"picoCTF\{.*\}",
+            "last_flag": "flag{my_flag_here}"
+        },
+        "Enviroment": {
+            "ctf_dir": "/home/venus/ctf"
+        }
+    }
+    test_config.parent.mkdir(parents=True, exist_ok=True)
+    with open(test_config, "w") as f:
+        toml.dump(default_data, f)
+        
+    monkeypatch.setenv("CTF_CONFIG_PATH", str(test_config))
+    return test_config