Test installing usethis in the venv it manages (#236)

nathanjmcdougall · web-flow · commit a4cf7b00c046 · 2025-01-25T12:14:56.000+13:00
* Test installing usethis in the venv it manages

* Change dir structure
diff --git a/tests/conftest.py b/tests/conftest.py
@@ -61,3 +61,8 @@ def _vary_network_conn(request: pytest.FixtureRequest) -> Generator[None, None,
     usethis_config.offline = offline
     yield
     usethis_config.offline = False
+
+
+@pytest.fixture
+def usethis_dev_dir() -> Path:
+    return Path(__file__).parent.parent
diff --git a/tests/test_install.py b/tests/test_install.py
@@ -0,0 +1,50 @@
+import shutil
+from collections.abc import Generator
+from pathlib import Path
+from tempfile import TemporaryDirectory
+
+import pytest
+
+from usethis._integrations.uv.call import call_uv_subprocess
+from usethis._subprocess import call_subprocess
+from usethis._test import change_cwd
+
+
+@pytest.fixture
+def usethis_installed_dir(
+    uv_init_dir: Path, usethis_dev_dir: Path
+) -> Generator[Path, None, None]:
+    with TemporaryDirectory() as tmp_path:
+        # Make a copy of the current usethis codebase to avoid interacting with pytest
+        copy_usethis_dev_dir = Path(tmp_path) / "usethis-python"
+        shutil.copytree(
+            usethis_dev_dir,
+            copy_usethis_dev_dir,
+            # The git repo is too big and we don't need it
+            ignore=shutil.ignore_patterns(".git"),
+        )
+
+        with change_cwd(copy_usethis_dev_dir):
+            # Initialize a git repository so the package can be built (since it relies
+            # on vcs)
+            call_subprocess(["git", "init"])
+            call_subprocess(["git", "add", "."])
+            call_subprocess(["git", "commit", "-m", "Initial commit"])
+
+        with change_cwd(uv_init_dir):
+            # Install usethis in a virtual environment
+            call_uv_subprocess(["add", f"{copy_usethis_dev_dir.as_posix()}"])
+
+        yield uv_init_dir
+
+
+class TestInstalledInOwnVenv:
+    def test_help(self, usethis_installed_dir):
+        with change_cwd(usethis_installed_dir):
+            # Should run without error
+            call_subprocess(["usethis", "--help"])
+
+    def test_add_pytest(self, usethis_installed_dir):
+        with change_cwd(usethis_installed_dir):
+            # Should run without error
+            call_subprocess(["usethis", "tool", "pytest"])
