Check return type is double (Issue #1805)

stan-dev · Mar 7, 2021 · da82b67 · da82b67
1 parent d0ef98c
commit da82b67
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/test/unit/math/prim/fun/rep_matrix_test.cpp b/test/unit/math/prim/fun/rep_matrix_test.cpp
@@ -16,6 +16,13 @@ TEST(MathMatrixPrimMat, rep_matrix) {
   EXPECT_THROW(rep_matrix(2.0, 3, -1), std::domain_error);
 }
 
+TEST(MathMatrixPrimMat, rep_matrix_always_returns_double) {
+  int a = 1;
+  auto x = stan::math::rep_matrix(a, 3, 4);
+
+  EXPECT_TRUE((std::is_same<double, stan::value_type_t<decltype(x)>>::value));
+}
+
 TEST(MathMatrixPrimMat, rep_matrix_vec) {
   using stan::math::rep_matrix;
   Eigen::Matrix<double, Eigen::Dynamic, 1> v(3);