skip regression test if cannot fetch data

Author: yarikoptic

debian/patches/series

@@ -1,2 +1,3 @@
+up_skip_test_regression
 up_ship_tests_data
 up_skip_notinydb

debian/patches/up_skip_test_regression

@@ -0,0 +1,22 @@
+--- a/tests/test_regression.py
++++ b/tests/test_regression.py
+@@ -7,6 +7,7 @@ import pytest
+ have_datalad = True
+ try:
+     from datalad import api # to pull and grab data
++    from datalad.support.exceptions import IncompleteResultsError
+ except ImportError:
+     have_datalad = False
+ 
+@@ -21,7 +22,10 @@ from .utils import fetch_data, gen_heudi
+ @pytest.mark.skipif(not have_datalad, reason="no datalad")
+ def test_conversion(tmpdir, subject, heuristic):
+     tmpdir.chdir()
+-    datadir = fetch_data(tmpdir.strpath, subject)
++    try:
++        datadir = fetch_data(tmpdir.strpath, subject)
++    except IncompleteResultsError as exc:
++        pytest.skip("Failed to fetch test data: %s" % str(exc))
+     outdir = tmpdir.mkdir('out').strpath
+ 
+     args = gen_heudiconv_args(datadir, outdir, subject, heuristic)