added test for check_vector_index

Author: t4c1

test/unit/math/prim/err/check_vector_index_test.cpp

@@ -0,0 +1,55 @@
+#include <stan/math/prim.hpp>
+#include <gtest/gtest.h>
+#include <limits>
+
+TEST(ErrorHandlingMatrix, checkVectorIndexColumnVector) {
+  Eigen::Matrix<double, Eigen::Dynamic, 1> y;
+  size_t i;
+  double nan = std::numeric_limits<double>::quiet_NaN();
+
+  i = 2;
+  y.resize(3);
+  y << nan, nan, nan;
+  EXPECT_NO_THROW(
+      stan::math::check_vector_index("checkVectorIndexMatrix", "i", y, i));
+  i = 3;
+  EXPECT_NO_THROW(
+      stan::math::check_vector_index("checkVectorIndexMatrix", "i", y, i));
+
+  y.resize(2);
+  y << nan, nan;
+  EXPECT_THROW(
+      stan::math::check_vector_index("checkVectorIndexMatrix", "i", y, i),
+      std::out_of_range);
+
+  i = 0;
+  EXPECT_THROW(
+      stan::math::check_vector_index("checkVectorIndexMatrix", "i", y, i),
+      std::out_of_range);
+}
+
+TEST(ErrorHandlingMatrix, checkVectorIndexRowVector) {
+  Eigen::Matrix<double, 1, Eigen::Dynamic> y;
+  size_t i;
+  double nan = std::numeric_limits<double>::quiet_NaN();
+
+  i = 2;
+  y.resize(3);
+  y << nan, nan, nan;
+  EXPECT_NO_THROW(
+      stan::math::check_vector_index("checkVectorIndexMatrix", "i", y, i));
+  i = 3;
+  EXPECT_NO_THROW(
+      stan::math::check_vector_index("checkVectorIndexMatrix", "i", y, i));
+
+  y.resize(2);
+  y << nan, nan;
+  EXPECT_THROW(
+      stan::math::check_vector_index("checkVectorIndexMatrix", "i", y, i),
+      std::out_of_range);
+
+  i = 0;
+  EXPECT_THROW(
+      stan::math::check_vector_index("checkVectorIndexMatrix", "i", y, i),
+      std::out_of_range);
+}