summaryrefslogtreecommitdiffstats
path: root/src/arrow/csharp/test/Apache.Arrow.Tests/DictionaryArrayTests.cs
diff options
context:
space:
mode:
Diffstat (limited to 'src/arrow/csharp/test/Apache.Arrow.Tests/DictionaryArrayTests.cs')
-rw-r--r--src/arrow/csharp/test/Apache.Arrow.Tests/DictionaryArrayTests.cs67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/arrow/csharp/test/Apache.Arrow.Tests/DictionaryArrayTests.cs b/src/arrow/csharp/test/Apache.Arrow.Tests/DictionaryArrayTests.cs
new file mode 100644
index 000000000..da678563c
--- /dev/null
+++ b/src/arrow/csharp/test/Apache.Arrow.Tests/DictionaryArrayTests.cs
@@ -0,0 +1,67 @@
+// 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.
+
+using System;
+using Apache.Arrow.Types;
+using Xunit;
+
+namespace Apache.Arrow.Tests
+{
+ public class DictionaryArrayTests
+ {
+ [Fact]
+ public void CreateTest()
+ {
+ (StringArray originalDictionary, Int32Array originalIndicesArray, DictionaryArray dictionaryArray) =
+ CreateSimpleTestData();
+
+ Assert.Equal(dictionaryArray.Dictionary, originalDictionary);
+ Assert.Equal(dictionaryArray.Indices, originalIndicesArray);
+ }
+
+ [Fact]
+ public void SliceTest()
+ {
+ (StringArray originalDictionary, Int32Array originalIndicesArray, DictionaryArray dictionaryArray) =
+ CreateSimpleTestData();
+
+ int batchLength = originalIndicesArray.Length;
+ for (int offset = 0; offset < batchLength; offset++)
+ {
+ for (int length = 1; offset + length <= batchLength; length++)
+ {
+ var sliced = dictionaryArray.Slice(offset, length) as DictionaryArray;
+ var actualSlicedDictionary = sliced.Dictionary as StringArray;
+ var actualSlicedIndicesArray = sliced.Indices as Int32Array;
+
+ var expectedSlicedIndicesArray = originalIndicesArray.Slice(offset, length) as Int32Array;
+
+ //Dictionary is not sliced.
+ Assert.Equal(originalDictionary.Data, actualSlicedDictionary.Data);
+ Assert.Equal(expectedSlicedIndicesArray.ToList(), actualSlicedIndicesArray.ToList());
+ }
+ }
+ }
+
+ private Tuple<StringArray, Int32Array, DictionaryArray> CreateSimpleTestData()
+ {
+ StringArray originalDictionary = new StringArray.Builder().AppendRange(new[] { "a", "b", "c" }).Build();
+ Int32Array originalIndicesArray = new Int32Array.Builder().AppendRange(new[] { 0, 0, 1, 1, 2, 2 }).Build();
+ var dictionaryArray = new DictionaryArray(new DictionaryType(Int32Type.Default, StringType.Default, false), originalIndicesArray, originalDictionary);
+
+ return Tuple.Create(originalDictionary, originalIndicesArray, dictionaryArray);
+ }
+ }
+}