Update test_cli.test_dl() to use __version__

message_ix/tests/test_cli.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+import re
 
 import pytest
 
@@ -45,4 +46,11 @@ def test_dl(message_ix_cli, opts, tmp_path):
     print(r.exception, r.output)
 
     if opts == "":
-        assert "Default: latest release v2.0.0" in r.output
+        # Guess what the latest release will be from GitHub, using __version__.
+        # This string is provided by setuptools-scm based on the most recent
+        # Git tag, e.g. if the tag is 'v3.0.0' it may be '3.0.1.devN+etc'.
+        major = message_ix.__version__.split('.')[0]
+
+        # 'message-ix dl' defaults to the latest release
+        pattern = re.compile(fr"Default: latest release v{major}\.\d+\.\d+")
+        assert pattern.match(r.output)