update with tests for generate_laplace_options

Author: SteveBronder

test/unit/math/laplace/generate_laplace_options_test.cpp

@@ -0,0 +1,44 @@
+#include <stan/math/mix/functor/laplace_marginal_density_estimator.hpp>
+#include <gtest/gtest.h>
+
+namespace stan::math::test {
+
+TEST(LaplaceMarginalDensityEstimator, GenerateLaplaceOptionsFromSizeDefaults) {
+  constexpr int theta_0_size = 4;
+  const auto defaults = laplace_options_default{};
+
+  const auto options = stan::math::generate_laplace_options(theta_0_size);
+  const auto& theta_0 = std::get<0>(options);
+
+  EXPECT_EQ(theta_0_size, theta_0.size());
+  EXPECT_TRUE(theta_0.isApprox(Eigen::VectorXd::Zero(theta_0_size)));
+  EXPECT_DOUBLE_EQ(defaults.tolerance, std::get<1>(options));
+  EXPECT_EQ(defaults.max_num_steps, std::get<2>(options));
+  EXPECT_EQ(defaults.solver, std::get<3>(options));
+  EXPECT_EQ(defaults.line_search.max_iterations, std::get<4>(options));
+  EXPECT_EQ(static_cast<int>(defaults.allow_fallthrough), std::get<5>(options));
+}
+
+TEST(LaplaceMarginalDensityEstimator, GenerateLaplaceOptionsFromSizeZero) {
+  const auto options = stan::math::generate_laplace_options(0);
+  const auto& theta_0 = std::get<0>(options);
+
+  EXPECT_EQ(0, theta_0.size());
+}
+
+TEST(LaplaceMarginalDensityEstimator, GenerateLaplaceOptionsFromThetaDefaults) {
+  Eigen::VectorXd theta_0(3);
+  theta_0 << -1.2, 0.5, 2.3;
+  const auto defaults = laplace_options_default{};
+
+  const auto options = stan::math::generate_laplace_options(theta_0);
+
+  EXPECT_TRUE(theta_0.isApprox(std::get<0>(options)));
+  EXPECT_DOUBLE_EQ(defaults.tolerance, std::get<1>(options));
+  EXPECT_EQ(defaults.max_num_steps, std::get<2>(options));
+  EXPECT_EQ(defaults.solver, std::get<3>(options));
+  EXPECT_EQ(defaults.line_search.max_iterations, std::get<4>(options));
+  EXPECT_EQ(static_cast<int>(defaults.allow_fallthrough), std::get<5>(options));
+}
+
+}  // namespace stan::math::test