src/sage/numerical/backends/generic_backend.pyx: Restore _test_ncols_…

…nonnegative, with comment
sagemath · Feb 1, 2021 · 0592226 · 0592226
1 parent c81c8db
commit 0592226
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/sage/numerical/backends/generic_backend.pyx b/src/sage/numerical/backends/generic_backend.pyx
@@ -867,6 +867,14 @@ cdef class GenericBackend:
         """
 
         raise NotImplementedError()
+
+    def _test_ncols_nonnegative(self, **options):
+        # Trac #31103: This method has already been migrated to pytest (generic_backend_test)
+        # and should be removed as soon as the external sage_numerical_backends packages
+        # are updated to invoke pytest as part of their testsuite.
+        tester = self._tester(**options)
+        p = self
+        tester.assertGreaterEqual(self.ncols(), 0)
 
     cpdef int nrows(self):
         """