Add a test for unmake-variant

Author: mgorny

tests/artifacts/test-plugin-package/README

@@ -0,0 +1 @@
+nothing interesting here

tests/artifacts/test-plugin-package/pyproject.toml

@@ -7,3 +7,4 @@ name = "test-plugin-package"
 version = "0"
 description = "Installable plugin for testing"
 requires-python = ">=3.9"
+readme = "README"

tests/artifacts/test_plugin_package-0-py3-none-any-00000000.whl

@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+import pytest
+
+from tests.utils import assert_zips_equal
+from variantlib.commands.main import main
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+
+@pytest.mark.parametrize(
+    "filename",
+    [
+        "test_plugin_package-0-py3-none-any-00000000.whl",
+    ],
+)
+def test_unmake_variant(
+    filename: str,
+    test_plugin_package_wheel_path: Path,
+    tmp_path: Path,
+) -> None:
+    main(
+        [
+            "unmake-variant",
+            "-f",
+            f"tests/artifacts/{filename}",
+            "-o",
+            str(tmp_path),
+        ]
+    )
+    assert_zips_equal(
+        test_plugin_package_wheel_path,
+        tmp_path / "test_plugin_package-0-py3-none-any.whl",
+    )