Method RunTest

tests/cpp/tree/test_tree_stat.cc:407–420

class TestMaxDeltaStep : public ::testing::Test {
 public:
  void RunTest(Context const* ctx, std::string const& updater, bst_target_t n_targets) {
    bst_idx_t n_samples = 4096;
    bst_feature_t n_features = 32;
    auto p_fmat = RandomDataGenerator(n_samples, n_features, .0f)
                      .Seed(3)
                      .Targets(n_targets)
                      .GenerateDMatrix(true);
    auto gpairs = GenerateRandomGradients(ctx, n_samples, n_targets);

    RegTree tree_0{static_cast<bst_target_t>(gpairs.gpair.Shape(1)),
                   static_cast<bst_target_t>(p_fmat->Info().num_col_)};
    BuildTree(ctx, p_fmat.get(), &gpairs, updater, Args{{"max_delta_step", std::to_string(0.5)}}, &tree_0);
    ASSERT_EQ(tree_0.NumNodes(), 1);
  }
};

TEST_F(TestMaxDeltaStep, Hist) {