test: add test for mismatch package build

dev-requirements.txt

@@ -24,3 +24,4 @@ types-PyYAML
 types-requests
 types-setuptools
 types-toml
+build

test/test_mismatch_cli.py

@@ -1,5 +1,9 @@
+import shutil
 import sqlite3
+import subprocess
+import sys
 from pathlib import Path
+from test.utils import LONG_TESTS
 from unittest.mock import patch
 
 import pytest
@@ -26,6 +30,14 @@ def test_db(tmpdir_factory):
     yield str(db_file)
 
 
+@pytest.fixture(scope="module")
+def build_cleanup():
+    yield
+    dist_dir = Path(__file__).resolve().parent.parent / "dist"
+    if dist_dir.exists():
+        shutil.rmtree(dist_dir)
+
+
 def test_lookup(capsys, monkeypatch, test_db):
     # Test with custom database path using the --database flag
     monkeypatch.setattr(
@@ -93,3 +105,16 @@ def verify_db(test_db):
         "facebook",
     )
     assert expected in result
+
+
+@pytest.mark.skipif(not LONG_TESTS(), reason="Skipping long tests")
+def test_package_build(build_cleanup):
+    build = subprocess.run([sys.executable, "-m", "build"], check=True)
+    assert build.returncode == 0, "Python build failed"
+
+    dist_dir = Path(__file__).resolve().parent.parent / "dist"
+    package_path = list(dist_dir.glob("*.whl"))[0]
+    subprocess.run(["pip", "install", str(package_path)], check=True)
+
+    result = subprocess.run(["mismatch", "--help"], capture_output=True, text=True)
+    assert "ModuleNotFoundError: No module named 'mismatch'" not in result.stderr