Remove some usages of uninitialized memory in constraint tests

Author: WardBrian

test/unit/math/prim/constraint/lb_transform_test.cpp

@@ -37,6 +37,7 @@ TEST(prob_transform, lb_constrain_matrix) {
   double lbd = 2.0;
 
   Eigen::VectorXd lb_bad(3);
+  lb_bad << 1.0, 2.0, 3.0;
 
   // matrix, real
   {
@@ -93,6 +94,7 @@ TEST(prob_transform, lb_constrain_std_vector) {
   double lbd = 2.0;
 
   Eigen::VectorXd lb_bad(3);
+  lb_bad << 1.0, 2.0, 3.0;
 
   std::vector<Eigen::VectorXd> x_vec = {x, x};
   std::vector<Eigen::VectorXd> lb_vec = {lb, lb2};

test/unit/math/prim/constraint/lub_transform_test.cpp

@@ -134,7 +134,10 @@ TEST(prob_transform, lub_constrain_matrix) {
   double lbd = -2.0;
 
   Eigen::VectorXd ub_bad(3);
+  ub_bad << 1.0, 2.0, 3.0;
+
   Eigen::VectorXd lb_bad(3);
+  lb_bad << -1.0, -2.0, -3.0;
 
   // matrix, real, real
   {
@@ -330,7 +333,9 @@ TEST(prob_transform, lub_constrain_stdvec_matrix) {
   double lbd = -2.0;
 
   Eigen::VectorXd ub_bad(3);
+  ub_bad << 1.0, 2.0, 3.0;
   Eigen::VectorXd lb_bad(3);
+  lb_bad << -1.0, -2.0, -3.0;
 
   std::vector<Eigen::VectorXd> x_vec{x, x};
   std::vector<Eigen::VectorXd> ub_vec{ub, ub};

test/unit/math/prim/constraint/ub_transform_test.cpp

@@ -37,6 +37,7 @@ TEST(prob_transform, ub_constrain_matrix) {
   double ubd = 2.0;
 
   Eigen::VectorXd ub_bad(3);
+  ub_bad << 1.0, 2.0, 3.0;
 
   // matrix, real
   {
@@ -94,6 +95,7 @@ TEST(prob_transform, ub_constrain_std_vector) {
   double ubd = 2.0;
 
   Eigen::VectorXd ub_bad(3);
+  ub_bad << 1.0, 2.0, 3.0;
 
   std::vector<Eigen::VectorXd> x_vec = {x, 2 * x};
   std::vector<Eigen::VectorXd> ub_vec = {ub, ub2};