ENH: Add test for skeleton update

Author: mgxd

templateflow/tests/test_conf.py

@@ -0,0 +1,25 @@
+from pathlib import Path
+from .. import conf, api
+
+
+def test_update_s3(tmp_path):
+    conf.TF_HOME = tmp_path / 'templateflow'
+    conf.TF_HOME.mkdir(exist_ok=True)
+
+    # replace TF_SKEL_URL with the path of a legacy skeleton
+    _skel_url = conf._s3.TF_SKEL_URL
+    conf._s3.TF_SKEL_URL = (
+        "https://github.com/templateflow/python-client/raw/0.5.0/"
+        "templateflow/conf/templateflow-skel.{ext}".format
+    )
+    # initialize templateflow home, making sure to pull the legacy skeleton
+    conf.update(local=False)
+    # ensure we can grab a file
+    assert Path(api.get('MNI152NLin2009cAsym', resolution=2, desc='brain', suffix='mask')).exists()
+    # and ensure we can't fetch one that doesn't yet exist
+    assert not api.get('Fischer344', hemi='L', desc='brain', suffix='mask')
+
+    # refresh the skeleton using the most recent skeleton
+    conf._s3.TF_SKEL_URL = _skel_url
+    conf.update(local=True, overwrite=True)
+    assert Path(api.get('Fischer344', hemi='L', desc='brain', suffix='mask')).exists()