Skip test_transmute when necessary

Signed-off-by: Julien Jerphanion <[email protected]>

micromamba/tests/test_package.py

@@ -6,6 +6,7 @@
 import zipfile
 from pathlib import Path
 
+import conda_package_handling.conda_fmt
 import pytest
 import zstandard
 from conda_package_handling import api as cph
@@ -148,6 +149,11 @@ def test_extract_compress(cph_test_file: Path, tmp_path: Path):
     assert_sorted(names[: len(info_files)])
 
 
+# Only run this test if zstandard is available.
+@pytest.mark.skipif(
+    not hasattr(conda_package_handling.conda_fmt, "ZSTD_COMPRESS_LEVEL"),
+    reason="zstandard not available (required by conda_package_handling)",
+)
 def test_transmute(cph_test_file: Path, tmp_path: Path):
     (tmp_path / "cph").mkdir(parents=True)
     (tmp_path / "mm").mkdir(parents=True)