New method _test_ncols_nonnegative

sagemath · Apr 13, 2016 · 5394729 · 5394729
1 parent 48b9fe5
commit 5394729
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/sage/numerical/backends/generic_backend.pyx b/src/sage/numerical/backends/generic_backend.pyx
@@ -767,6 +767,11 @@ cdef class GenericBackend:
 
         raise NotImplementedError()
 
+    def _test_ncols_nonnegative(self, **options):
+        tester = self._tester(**options)
+        p = self
+        tester.assertGreaterEqual(self.ncols(), 0)
+
     cpdef int nrows(self):
         """
         Return the number of rows/constraints.