Hermes-agent

2026-06-14 14:30:48 -04:00
commit dac4b88b94
5058 changed files with 1884848 additions and 0 deletions
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+"""Tests for tui_gateway/entry.py sys.path hardening (issue #15989).
+
+When the TUI backend is spawned by Node.js, the Python interpreter may have
+'' or '.' at the front of sys.path, allowing a local utils/ directory in CWD
+to shadow the installed utils module.  entry.py must sanitize sys.path before
+any non-stdlib import is resolved.
+"""
+
+import os
+import sys
+from unittest.mock import patch
+
+
+def _reload_entry_with_env(env_overrides: dict) -> None:
+    """Re-execute entry.py's module-level path setup under a controlled env."""
+    # We only want to exercise the sys.path fixup block, not the signal/import
+    # machinery that follows.  We do this by running the fixup code verbatim in
+    # a fresh copy of sys.path rather than importing the real module (which
+    # would trigger tui_gateway.server imports requiring heavy mocks).
+    original_path = sys.path[:]
+    original_env = {k: os.environ.get(k) for k in env_overrides}
+    try:
+        with patch.dict(os.environ, env_overrides, clear=False):
+            _src_root = os.environ.get("HERMES_PYTHON_SRC_ROOT", "")
+            if _src_root and _src_root not in sys.path:
+                sys.path.insert(0, _src_root)
+            sys.path = [p for p in sys.path if p not in {"", "."}]
+        return sys.path[:]
+    finally:
+        sys.path = original_path
+        for k, v in original_env.items():
+            if v is None:
+                os.environ.pop(k, None)
+            else:
+                os.environ[k] = v
+
+
+def test_empty_string_and_dot_removed_from_sys_path():
+    original = sys.path[:]
+    try:
+        sys.path.insert(0, "")
+        sys.path.insert(0, ".")
+        assert "" in sys.path
+        assert "." in sys.path
+
+        # Run the entry.py fixup logic directly
+        sys.path = [p for p in sys.path if p not in {"", "."}]
+
+        assert "" not in sys.path
+        assert "." not in sys.path
+    finally:
+        sys.path = original
+
+
+def test_hermes_src_root_inserted_at_front():
+    original = sys.path[:]
+    try:
+        fake_root = "/fake/hermes/src"
+        with patch.dict(os.environ, {"HERMES_PYTHON_SRC_ROOT": fake_root}):
+            _src_root = os.environ.get("HERMES_PYTHON_SRC_ROOT", "")
+            if _src_root and _src_root not in sys.path:
+                sys.path.insert(0, _src_root)
+            sys.path = [p for p in sys.path if p not in {"", "."}]
+
+        assert sys.path[0] == fake_root
+    finally:
+        sys.path = original
+
+
+def test_src_root_not_duplicated_if_already_present():
+    original = sys.path[:]
+    try:
+        fake_root = "/already/present"
+        sys.path.insert(0, fake_root)
+        count_before = sys.path.count(fake_root)
+
+        with patch.dict(os.environ, {"HERMES_PYTHON_SRC_ROOT": fake_root}):
+            _src_root = os.environ.get("HERMES_PYTHON_SRC_ROOT", "")
+            if _src_root and _src_root not in sys.path:
+                sys.path.insert(0, _src_root)
+            sys.path = [p for p in sys.path if p not in {"", "."}]
+
+        assert sys.path.count(fake_root) == count_before
+    finally:
+        sys.path = original
+
+
+def test_no_src_root_env_does_not_crash():
+    original = sys.path[:]
+    try:
+        env = {k: v for k, v in os.environ.items() if k != "HERMES_PYTHON_SRC_ROOT"}
+        with patch.dict(os.environ, {}, clear=True):
+            os.environ.update(env)
+            _src_root = os.environ.get("HERMES_PYTHON_SRC_ROOT", "")
+            if _src_root and _src_root not in sys.path:
+                sys.path.insert(0, _src_root)
+            sys.path = [p for p in sys.path if p not in {"", "."}]
+        # No exception raised
+    finally:
+        sys.path = original