Method TestMissingNullCount

cpp/src/parquet/statistics_test.cc:795–810

statistics.all_null_value is used to build the page index. If statistics doesn't have null count, all_null_value should be false.

  // statistics.all_null_value is used to build the page index.
  // If statistics doesn't have null count, all_null_value should be false.
  void TestMissingNullCount() {
    EncodedStatistics encoded_statistics;
    encoded_statistics.has_null_count = false;
    auto statistics = Statistics::Make(this->schema_.Column(0), &encoded_statistics,
                                       /*num_values=*/1000);
    auto typed_stats = std::dynamic_pointer_cast<TypedStatistics<TestType>>(statistics);
    EXPECT_FALSE(typed_stats->HasNullCount());
    auto encoded = typed_stats->Encode();
    EXPECT_FALSE(encoded.all_null_value);
    EXPECT_FALSE(encoded.has_null_count);
    EXPECT_FALSE(encoded.has_distinct_count);
    EXPECT_FALSE(encoded.has_min);
    EXPECT_FALSE(encoded.has_max);
    EXPECT_FALSE(encoded.is_min_value_exact.has_value());
    EXPECT_FALSE(encoded.is_max_value_exact.has_value());
  }
};

TYPED_TEST_SUITE(TestStatisticsHasFlag, Types);