Cleaned up unit test

Author: jajhall

check/TestPresolve.cpp

@@ -737,24 +737,26 @@ TEST_CASE("presolve-issue-2446", "[highs_test_presolve]") {
 
 TEST_CASE("presolve-solve-postsolve-no-col-dual", "[highs_test_presolve]") {
   Highs highs;
-  //  highs.setOptionValue("output_flag", dev_run);
+  highs.setOptionValue("output_flag", dev_run);
   std::string model_file =
       std::string(HIGHS_DIR) + "/check/instances/afiro.mps";
   highs.readModel(model_file);
   highs.presolve();
   HighsLp presolved_lp = highs.getPresolvedLp();
   Highs highs1;
-  //  highs1.setOptionValue("output_flag", dev_run);
+  highs1.setOptionValue("output_flag", dev_run);
   highs1.setOptionValue("presolve", kHighsOffString);
-  highs1.setOptionValue("solver", kPdlpString);
   highs1.passModel(presolved_lp);
   highs1.run();
   HighsSolution solution = highs1.getSolution();
 
   // Perform postsolve using the optimal solution and basis for the
   // presolved model
+  REQUIRE(highs.postsolve(solution) == HighsStatus::kOk);
+
+  // If row duals are supplied, then column duals must also be suppplied
   solution.col_dual.clear();
-  highs.postsolve(solution);
+  REQUIRE(highs.postsolve(solution) == HighsStatus::kError);
 
   highs.resetGlobalScheduler(true);
 }