Add CLI tests

tests/cli_test.py

@@ -0,0 +1,37 @@
+from unittest import mock
+
+from pytest import MonkeyPatch
+
+import packaged.cli
+
+
+def test_cli(monkeypatch: MonkeyPatch) -> None:
+    """Ensures that CLI passes args to `create_package()` properly."""
+    # Don't want to run makeself while testing CLI
+    monkeypatch.setattr(packaged.cli, "ensure_makeself", lambda: None)
+
+    with mock.patch.object(packaged.cli, "create_package") as mocked:
+        packaged.cli.cli(["./foo", "pip install foo", "python -m foo"])
+
+    # source_directory is None
+    mocked.assert_called_with(None, "./foo", "pip install foo", "python -m foo")
+
+    with mock.patch.object(packaged.cli, "create_package") as mocked:
+        packaged.cli.cli(
+            [
+                "./bar",
+                "pip install -rrequirements.txt",
+                "python src/mypackage/cli.py",
+                "./mypackage",
+            ]
+        )
+
+    # source_directory is `./mypackage`
+    mocked.assert_called_with(
+        mock.ANY,
+        "./bar",
+        "pip install -rrequirements.txt",
+        "python src/mypackage/cli.py",
+    )
+    args = mocked.call_args[0]
+    assert args[0].endswith("/mypackage")