chore: add test for generate_db

.pre-commit-config.yaml

@@ -99,7 +99,13 @@ repos:
         args:
           - --ignore-missing-imports
           - --disallow-untyped-defs
-        exclude: "(?x)^(\n    docs/source/conf.py|\n    cleanup.py|\n    tasks.py\n)$\n"
+        exclude: |
+          (?x)^(
+              docs/source/conf.py|
+              cleanup.py|
+              tasks.py
+              tests
+          )$
         id: mypy
     repo: https://github.com/pre-commit/mirrors-mypy
     rev: v0.971

tests/test_generate_db.py

@@ -0,0 +1,17 @@
+# Core Library modules
+from typing import Any
+
+# Third party modules
+import pytest
+
+# First party modules
+from piptools_sync import piptools_sync
+
+TEST_DIR = pytest.TEST_DIR
+
+
+def test_generate_db(
+    mock_get_precommit_repos: Any, mock_get_latest_pypi_repo_version: Any
+) -> None:
+    result = piptools_sync.generate_db()
+    assert result == {"https://github.com/pre-commit/mirrors-mypy": "mypy"}