add tests with lp amd milp capabilities

Author: Iroy30

pyomo/solvers/plugins/solvers/cuopt_direct.py

@@ -48,6 +48,9 @@ def __init__(self, **kwds):
         kwds['type'] = 'cuoptdirect'
         super(CUOPTDirect, self).__init__(**kwds)
         self._python_api_exists = True
+        # Note: Undefined capabilities default to None
+        self._capabilities.linear = True
+        self._capabilities.integer = True
 
     def _apply_solver(self):
         StaleFlagManager.mark_all_as_stale()

pyomo/solvers/tests/solvers.py

@@ -426,6 +426,23 @@ def test_solver_cases(*args):
 
         logging.disable(logging.NOTSET)
 
+        #
+        # CUOPT
+        #
+        _cuopt_capabilities = set(
+            [
+                'linear',
+                'integer',
+            ]
+        )
+
+        _test_solver_cases['cuopt', 'python'] = initialize(
+            name='cuopt_direct',
+            io='python',
+            capabilities=_cuopt_capabilities,
+            import_suffixes=['rc'],
+        )
+
         #
         # Error Checks
         #