| // |
| // Copyright 2019 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #include "testing/density_estimation.h" |
| |
| #include <limits> |
| |
| #include "base/logging.h" |
| #include "base/testing/status_matchers.h" |
| #include "gmock/gmock.h" |
| #include "gtest/gtest.h" |
| #include "base/status.h" |
| |
| namespace differential_privacy { |
| namespace testing { |
| namespace { |
| |
| template <typename T> |
| class HistogramTest : public ::testing::Test {}; |
| |
| typedef ::testing::Types<int64_t, double> NumericTypes; |
| TYPED_TEST_SUITE(HistogramTest, NumericTypes); |
| |
| TYPED_TEST(HistogramTest, EmptyHistogram) { |
| Histogram<TypeParam> hist(-2, .5, 8); |
| for (int i = 0; i < hist.NumBins(); ++i) { |
| EXPECT_EQ(0, hist.BinCountOrDie(i)); |
| } |
| EXPECT_EQ(hist.Total(), 0); |
| EXPECT_EQ(hist.MaxBinCount(), 0); |
| } |
| |
| TYPED_TEST(HistogramTest, AddOutOfBounds) { |
| Histogram<TypeParam> hist(-2, .5, 8); |
| EXPECT_EQ(hist.Add(-3).code(), absl::StatusCode::kInvalidArgument); |
| } |
| |
| TYPED_TEST(HistogramTest, BinCountOutOfBounds) { |
| const int num_bins = 8; |
| Histogram<TypeParam> hist(-2, .5, num_bins); |
| EXPECT_EQ(hist.BinCount(-1).status().code(), |
| absl::StatusCode::kInvalidArgument); |
| EXPECT_EQ(hist.BinCount(num_bins + 1).status().code(), |
| absl::StatusCode::kInvalidArgument); |
| } |
| |
| TYPED_TEST(HistogramTest, BinBoundaries) { |
| Histogram<TypeParam> hist(-2, .5, 8); |
| EXPECT_EQ(hist.BinBoundary(0), -2); |
| EXPECT_EQ(hist.BinBoundary(4), 0); |
| EXPECT_EQ(hist.BinBoundary(8), std::numeric_limits<TypeParam>::max()); |
| } |
| |
| TYPED_TEST(HistogramTest, SmallInputSet) { |
| Histogram<TypeParam> hist(-2, 2, 3); |
| EXPECT_OK(hist.Add(-1)); |
| EXPECT_OK(hist.Add(0)); |
| EXPECT_OK(hist.Add(0)); |
| EXPECT_OK(hist.Add(100)); |
| EXPECT_EQ(hist.BinCountOrDie(0), 1); |
| EXPECT_EQ(hist.BinCountOrDie(1), 2); |
| EXPECT_EQ(hist.BinCountOrDie(2), 1); |
| EXPECT_EQ(hist.Total(), 4); |
| EXPECT_EQ(hist.MaxBinCount(), 2); |
| } |
| |
| TEST(HistogramTest, ToStringEmpty) { |
| Histogram<double> hist(0, 1.0 / 3.0, 2); |
| const std::string expected = absl::StrCat( |
| "\n", "-------------------------------------------------------------\n", |
| "Empty histogram.\n", |
| "-------------------------------------------------------------"); |
| EXPECT_EQ(hist.ToString(), expected); |
| LOG(INFO) << hist.ToString(); |
| } |
| |
| TEST(HistogramTest, ToString) { |
| Histogram<double> hist(0, 1.0 / 3.0, 2); |
| ASSERT_OK(hist.Add(.25)); |
| ASSERT_OK(hist.Add(.4)); |
| ASSERT_OK(hist.Add(.4)); |
| const std::string expected = absl::StrCat( |
| "\n", "-------------------------------------------------------------\n", |
| "[ 0, 0.333333) 1 33.333% ######\n", |
| "[ 0.333333, inf) 2 66.667% ############\n", |
| "-------------------------------------------------------------"); |
| EXPECT_EQ(hist.ToString(), expected); |
| LOG(INFO) << hist.ToString(); |
| } |
| |
| } // namespace |
| } // namespace testing |
| } // namespace differential_privacy |