Add Gmm CLI test

src/mlpack/methods/gmm/gmm_train_main.cpp

@@ -144,12 +144,18 @@ static void mlpackMain()
       "number of Gaussians must be positive");
   const int gaussians = CLI::GetParam<int>("gaussians");
 
+  RequireParamValue<int>("trials", [](int x) { return x > 0; }, true,
+      "trials must be greater than 0");
+
   ReportIgnoredParam({{ "diagonal_covariance", true }}, "no_force_positive");
   RequireAtLeastOnePassed({ "output_model" }, false, "no model will be saved");
 
   RequireParamValue<double>("noise", [](double x) { return x >= 0.0; }, true,
       "variance of noise must be greater than or equal to 0");
 
+  RequireParamValue<int>("max_iterations", [](int x) { return x >= 0; }, true,
+      "max_iterations must be greater than or equal to 0");
+
   arma::mat dataPoints = std::move(CLI::GetParam<arma::mat>("input"));
 
   // Do we need to add noise to the dataset?

src/mlpack/tests/CMakeLists.txt

@@ -120,6 +120,9 @@ add_executable(mlpack_test
   main_tests/det_test.cpp
   main_tests/decision_tree_test.cpp
   main_tests/decision_stump_test.cpp
+  main_tests/gmm_generate_test.cpp
+  main_tests/gmm_probability_test.cpp
+  main_tests/gmm_train_test.cpp
   main_tests/kde_test.cpp
   main_tests/linear_regression_test.cpp
   main_tests/logistic_regression_test.cpp