1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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.
class TestArrayStatistics < Test::Unit::TestCase
def setup
data = Tempfile.create(["red-parquet", ".parquet"]) do |file|
table = Arrow::Table.new(int64: [nil, -(2 ** 32), 2 ** 32])
table.save(file)
File.read(file, mode: "rb")
end
loaded_table = Arrow::Table.load(Arrow::Buffer.new(data),
format: :parquet)
@statistics = loaded_table[:int64].data.chunks[0].statistics
end
def test_null_count
assert do
@statistics.has_null_count?
end
assert do
@statistics.null_count_exact?
end
assert_equal(1, @statistics.null_count)
end
def test_distinct_count
assert do
not @statistics.has_distinct_count?
end
assert do
not @statistics.distinct_count_exact?
end
assert_nil(@statistics.distinct_count)
end
end
|
