added test

Author: aliceb-nv

cpp/tests/mip/empty_fixed_problems_test.cu

@@ -78,4 +78,11 @@ TEST(mip_solve, empty_max_problem_with_objective_test)
   EXPECT_NEAR(obj_val, 11, 1e-5);
 }
 
+TEST(mip_solve, mip_presolved_to_lp)
+{
+  auto [termination_status, obj_val, lb] = test_mps_file("mip/mip-presolved-to-lp.mps", 5, false);
+  EXPECT_EQ(termination_status, mip_termination_status_t::Optimal);
+  EXPECT_NEAR(obj_val, 0, 1e-5);
+}
+
 }  // namespace cuopt::linear_programming::test

datasets/mip/mip-presolved-to-lp.mps

@@ -0,0 +1,32 @@
+NAME          LP_PROBLEM
+ROWS
+ N  OBJ
+ E  R001
+ E  R002
+ E  R003
+ L  R004
+ L  R005
+ L  R006
+ L  R007
+COLUMNS
+    X001    OBJ          1.000000
+    X001    R004     -1.000000
+    X001    R006     -1.000000
+    X002    OBJ          1.000000
+    X002    R005     -1.000000
+    X002    R007     -1.000000
+    X003    R001      1.000000
+    X003    R004      1.000000
+    X003    R006     -1.000000
+    X004    R002      1.000000
+    X004    R005      1.000000
+    X004    R007     -1.000000
+    X005    R001     -1.000000
+    X005    R002     -1.000000
+    X005    R003      1.000000
+RHS
+BOUNDS
+ LO BND1    X005      0.000000
+ UP BND1    X005      1.000000
+ BV BND1    X005
+ENDATA