d41aab4f61
Test the objective functions in regression_obj.cc tests/cpp: Add tests for objective.cc and RegLossObj
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
#include "./helpers.h"
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std::string TempFileName() {
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return std::tmpnam(nullptr);
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}
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bool FileExists(const std::string name) {
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struct stat st;
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return stat(name.c_str(), &st) == 0;
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}
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long GetFileSize(const std::string filename) {
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struct stat st;
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stat(filename.c_str(), &st);
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return st.st_size;
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}
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std::string CreateSimpleTestData() {
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std::string tmp_file = TempFileName();
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std::ofstream fo;
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fo.open(tmp_file);
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fo << "0 0:0 1:10 2:20\n";
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fo << "1 0:0 3:30 4:40\n";
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fo.close();
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return tmp_file;
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}
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void CheckObjFunction(xgboost::ObjFunction * obj,
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std::vector<xgboost::bst_float> preds,
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std::vector<xgboost::bst_float> labels,
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std::vector<xgboost::bst_float> weights,
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std::vector<xgboost::bst_float> out_grad,
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std::vector<xgboost::bst_float> out_hess) {
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xgboost::MetaInfo info;
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info.num_row = labels.size();
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info.labels = labels;
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info.weights = weights;
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std::vector<xgboost::bst_gpair> gpair;
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obj->GetGradient(preds, info, 1, &gpair);
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ASSERT_EQ(gpair.size(), preds.size());
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for (int i = 0; i < gpair.size(); ++i) {
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EXPECT_NEAR(gpair[i].grad, out_grad[i], 0.01)
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<< "Unexpected grad for pred=" << preds[i] << " label=" << labels[i]
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<< " weight=" << weights[i];
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EXPECT_NEAR(gpair[i].hess, out_hess[i], 0.01)
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<< "Unexpected hess for pred=" << preds[i] << " label=" << labels[i]
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<< " weight=" << weights[i];
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}
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}
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