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1 | // Licensed to the Apache Software Foundation (ASF) under one or more |
2 | // contributor license agreements. See the NOTICE file distributed with | |
3 | // this work for additional information regarding copyright ownership. | |
4 | // The ASF licenses this file to You under the Apache License, Version 2.0 | |
5 | // (the "License"); you may not use this file except in compliance with | |
6 | // the License. You may obtain a copy of the License at | |
7 | // | |
8 | // http://www.apache.org/licenses/LICENSE-2.0 | |
9 | // | |
10 | // Unless required by applicable law or agreed to in writing, software | |
11 | // distributed under the License is distributed on an "AS IS" BASIS, | |
12 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | // See the License for the specific language governing permissions and | |
14 | // limitations under the License. | |
15 | ||
16 | using System; | |
17 | using Apache.Arrow.Types; | |
18 | using Xunit; | |
19 | ||
20 | namespace Apache.Arrow.Tests | |
21 | { | |
22 | public class DictionaryArrayTests | |
23 | { | |
24 | [Fact] | |
25 | public void CreateTest() | |
26 | { | |
27 | (StringArray originalDictionary, Int32Array originalIndicesArray, DictionaryArray dictionaryArray) = | |
28 | CreateSimpleTestData(); | |
29 | ||
30 | Assert.Equal(dictionaryArray.Dictionary, originalDictionary); | |
31 | Assert.Equal(dictionaryArray.Indices, originalIndicesArray); | |
32 | } | |
33 | ||
34 | [Fact] | |
35 | public void SliceTest() | |
36 | { | |
37 | (StringArray originalDictionary, Int32Array originalIndicesArray, DictionaryArray dictionaryArray) = | |
38 | CreateSimpleTestData(); | |
39 | ||
40 | int batchLength = originalIndicesArray.Length; | |
41 | for (int offset = 0; offset < batchLength; offset++) | |
42 | { | |
43 | for (int length = 1; offset + length <= batchLength; length++) | |
44 | { | |
45 | var sliced = dictionaryArray.Slice(offset, length) as DictionaryArray; | |
46 | var actualSlicedDictionary = sliced.Dictionary as StringArray; | |
47 | var actualSlicedIndicesArray = sliced.Indices as Int32Array; | |
48 | ||
49 | var expectedSlicedIndicesArray = originalIndicesArray.Slice(offset, length) as Int32Array; | |
50 | ||
51 | //Dictionary is not sliced. | |
52 | Assert.Equal(originalDictionary.Data, actualSlicedDictionary.Data); | |
53 | Assert.Equal(expectedSlicedIndicesArray.ToList(), actualSlicedIndicesArray.ToList()); | |
54 | } | |
55 | } | |
56 | } | |
57 | ||
58 | private Tuple<StringArray, Int32Array, DictionaryArray> CreateSimpleTestData() | |
59 | { | |
60 | StringArray originalDictionary = new StringArray.Builder().AppendRange(new[] { "a", "b", "c" }).Build(); | |
61 | Int32Array originalIndicesArray = new Int32Array.Builder().AppendRange(new[] { 0, 0, 1, 1, 2, 2 }).Build(); | |
62 | var dictionaryArray = new DictionaryArray(new DictionaryType(Int32Type.Default, StringType.Default, false), originalIndicesArray, originalDictionary); | |
63 | ||
64 | return Tuple.Create(originalDictionary, originalIndicesArray, dictionaryArray); | |
65 | } | |
66 | } | |
67 | } |