78bea0d204
* Add google test for a column sampling, restore metainfo tests * Update metainfo test for visual studio * Fix multi-GPU bug introduced in #3635
38 lines
1.0 KiB
C++
38 lines
1.0 KiB
C++
#include "../../../src/common/random.h"
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#include "../helpers.h"
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#include "gtest/gtest.h"
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namespace xgboost {
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namespace common {
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TEST(ColumnSampler, Test) {
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int n = 100;
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ColumnSampler cs;
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cs.Init(n, 0.5f, 0.5f);
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auto &set0 = cs.GetFeatureSet(0).HostVector();
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ASSERT_EQ(set0.size(), 25);
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auto &set1 = cs.GetFeatureSet(0).HostVector();
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ASSERT_EQ(set0, set1);
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auto &set2 = cs.GetFeatureSet(1).HostVector();
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ASSERT_NE(set1, set2);
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ASSERT_EQ(set2.size(), 25);
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// No level sampling, should be the same at different depth
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cs.Init(n, 1.0f, 0.5f);
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ASSERT_EQ(cs.GetFeatureSet(0).HostVector(), cs.GetFeatureSet(1).HostVector());
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cs.Init(n, 1.0f, 1.0f);
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auto &set3 = cs.GetFeatureSet(0).HostVector();
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ASSERT_EQ(set3.size(), n);
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cs.Init(n, 1.0f, 1.0f);
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auto &set4 = cs.GetFeatureSet(0).HostVector();
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ASSERT_EQ(set3, set4);
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// Should always be a minimum of one feature
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cs.Init(n, 1e-16f, 1e-16f);
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ASSERT_EQ(cs.GetFeatureSet(0).HostVector().size(), 1);
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}
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} // namespace common
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} // namespace xgboost
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