test_load_remote_dataset_benchmark_with_region: cpt is not available in GMT 6.3.0

Author: seisman

pygmt/tests/test_datasets_load_remote_datasets.py

@@ -2,6 +2,8 @@
 Test the _load_remote_dataset function.
 """
 import pytest
+from packaging.version import Version
+from pygmt.clib import __gmt_version__
 from pygmt.datasets.load_remote_dataset import _load_remote_dataset
 from pygmt.exceptions import GMTInvalidInput
 
@@ -27,11 +29,13 @@ def test_load_remote_dataset_benchmark_with_region():
     data = load_remote_dataset_wrapper(resolution="01d", region=[-10, 10, -5, 5])
     assert data.name == "seafloor_age"
     assert data.attrs["long_name"] == "age of seafloor crust"
-    assert data.attrs["cpt"] == "@earth_age.cpt"
     assert data.attrs["units"] == "Myr"
     assert data.attrs["horizontal_datum"] == "WGS84"
     assert data.gmt.registration == 0
     assert data.shape == (11, 21)
+    # The cpt attribute was added after GMT 6.4.0
+    if Version(__gmt_version__) >= Version("6.4.0"):
+        assert data.attrs["cpt"] == "@earth_age.cpt"
 
 
 def test_load_remote_dataset_invalid_resolutions():