test: add CLI search subcommand and cluster loading tests

- Test `lucide search` with a mock search DB
- Test `lucide search` with nonexistent DB returns error
- Verify cluster data is loaded into search DB by build_search_db
- 62 tests total, all passing

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mmacpherson

tests/build_search_test.py

@@ -266,6 +266,15 @@ def test_builds_db_from_jsonl(self, sample_jsonl, search_db, sample_clusters):
         assert meta["embedding_dim"] == str(DEFAULT_EMBEDDING_DIM)
         assert "built_at" in meta
 
+        # Check clusters were loaded
+        cluster_rows = conn.execute(
+            "SELECT name, theme FROM icon_clusters ORDER BY name"
+        ).fetchall()
+        assert len(cluster_rows) == 3
+        themes = {r[1] for r in cluster_rows}
+        assert "Love & Favorites" in themes
+        assert "Shapes" in themes
+
         conn.close()
 
     def test_rebuilds_from_scratch(self, sample_jsonl, search_db, sample_clusters):

tests/cli_test.py

@@ -1,10 +1,13 @@
 import pathlib
+import sqlite3
 import subprocess
 from unittest import mock
 
+import numpy as np
 import pytest
 
-from lucide import cli
+from lucide import cli, search
+from lucide.config import DEFAULT_EMBEDDING_DIM
 
 
 @pytest.fixture
@@ -151,3 +154,60 @@ def test_legacy_lucide_db_alias(self):
 
             mock_build.assert_called_once()
             assert result == 0
+
+    def test_search_subcommand(self, tmp_path):
+        search_db = tmp_path / "test-search.db"
+        conn = sqlite3.connect(search_db)
+        conn.execute(
+            "CREATE TABLE icon_descriptions"
+            " (name TEXT PRIMARY KEY, description TEXT, model TEXT)"
+        )
+        conn.execute(
+            "CREATE TABLE icon_embeddings"
+            " (name TEXT PRIMARY KEY, embedding BLOB, model TEXT)"
+        )
+        conn.execute(
+            "CREATE TABLE icon_clusters (name TEXT, cluster_id INTEGER, theme TEXT)"
+        )
+        conn.execute("CREATE TABLE metadata (key TEXT PRIMARY KEY, value TEXT)")
+        emb = (
+            np.random.default_rng(42)
+            .standard_normal(DEFAULT_EMBEDDING_DIM)
+            .astype(np.float32)
+        )
+        conn.execute(
+            "INSERT INTO icon_descriptions VALUES (?, ?, ?)",
+            ("heart", "A heart icon", "test"),
+        )
+        conn.execute(
+            "INSERT INTO icon_embeddings VALUES (?, ?, ?)",
+            ("heart", emb.tobytes(), "test"),
+        )
+        conn.execute("INSERT INTO metadata VALUES ('version', 'test')")
+        conn.commit()
+        conn.close()
+
+        with mock.patch(
+            "sys.argv",
+            ["lucide", "search", "love", "--search-db", str(search_db)],
+        ):
+            result = cli.main()
+        assert result == 0
+
+    def test_search_subcommand_no_db(self, monkeypatch):
+        monkeypatch.delenv("LUCIDE_SEARCH_DB_PATH", raising=False)
+        search._search_index = None
+        search._embedder_instance = None
+
+        with mock.patch(
+            "sys.argv",
+            [
+                "lucide",
+                "search",
+                "love",
+                "--search-db",
+                "/nonexistent/search.db",
+            ],
+        ):
+            result = cli.main()
+        assert result == 1