From 4ef3539bb9fa64d4ff420d35ef1bdc80a499eca7 Mon Sep 17 00:00:00 2001
From: host <host@test.local>
Date: Mon, 26 Oct 2026 00:16:54 +0800
Subject: [PATCH] host: real-tests

---
 tests/test_host.py | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 tests/test_host.py

diff --git a/tests/test_host.py b/tests/test_host.py
new file mode 100644
index 0000000..d039ea0
--- /dev/null
+++ b/tests/test_host.py
@@ -0,0 +1,56 @@
+import json
+import os
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPO_ROOT))
+
+import host
+
+
+class HostPureFunctionsTest(unittest.TestCase):
+    def test_save_state_merges_tasks_and_preserves_disk_tasks(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            state_path = os.path.join(tmp, "host-state.json")
+            with open(state_path, "w", encoding="utf-8") as f:
+                json.dump({"tasks": {"disk-task": {"status": "running"}},
+                           "automations": []}, f)
+
+            state = {"tasks": {"memory-task": {"status": "completed"}},
+                     "automations": []}
+            host.save_state(state_path, state)
+
+            self.assertEqual(state["tasks"]["disk-task"], {"status": "running"})
+            self.assertEqual(state["tasks"]["memory-task"], {"status": "completed"})
+            loaded = host.load_state(state_path)
+            self.assertEqual(loaded, state)
+
+    def test_task_diff_includes_untracked_text_contents(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            subprocess.run(["git", "init", "-q"], cwd=tmp, check=True)
+            Path(tmp, "tracked.txt").write_text("tracked\n", encoding="utf-8")
+            subprocess.run(["git", "add", "tracked.txt"], cwd=tmp, check=True)
+            subprocess.run(["git", "-c", "user.name=Test", "-c",
+                            "user.email=test@example.com", "commit", "-qm",
+                            "initial"], cwd=tmp, check=True)
+            Path(tmp, "new.txt").write_text("new file contents\n", encoding="utf-8")
+
+            result = host.task_diff(tmp)
+
+            self.assertIn("new.txt", result["untracked"].splitlines())
+            self.assertEqual(result["untracked_contents"]["new.txt"],
+                             "new file contents\n")
+
+    def test_load_config_file_returns_empty_dict_for_missing_file(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            missing = os.path.join(tmp, "missing.json")
+            self.assertEqual(host._load_config_file(missing), {})
+
+
+if __name__ == "__main__":
+    unittest.main()