dealii: fix concretization of xsdk package (#10288)

* dealii: fix concretization of xsdk package

* tests: add concretization tests for deal.II and xSDK, which are often broken due to limitations in the concretizer

* use pytest.mark.parametrize

lib/spack/spack/test/concretize.py

@@ -224,6 +224,17 @@ def concretize_multi_provider(self):
         s.concretize()
         assert s['mpi'].version == ver('1.10.3')
 
+    @pytest.mark.parametrize("spec,version", [
+        ('dealii', 'develop'),
+        ('xsdk', '0.4.0'),
+    ])
+    def concretize_difficult_packages(self, a, b):
+        """Test a couple of large packages that are often broken due
+        to current limitations in the concretizer"""
+        s = Spec(a + '@' + b)
+        s.concretize()
+        assert s[a].version == ver(b)
+
     def test_concretize_two_virtuals(self):
 
         """Test a package with multiple virtual dependencies."""