Joseph Doherty
f5468d019f
Add MapOrdinal method to the IDataTransformer interface and provide a default implementation in DataTransformerBase. This enables transformers to report the mapping between transformed ordinals and source ordinals, supporting use cases like computed columns which return -1 to indicate no source ordinal. - Add MapOrdinal(int, IDataReader) to IDataTransformer interface - Add virtual MapOrdinal implementation in DataTransformerBase - Add DataTransformerBaseTests with test for default behavior
41 lines
1.1 KiB
C#
41 lines
1.1 KiB
C#
using System.Data;
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using JdeScoping.DataSync.Etl.Transformers;
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using NSubstitute;
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namespace JdeScoping.DataSync.Tests.Etl.Transformers;
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public class DataTransformerBaseTests
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{
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[Fact]
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public void MapOrdinal_DefaultImplementation_ReturnsOrdinalUnchanged()
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{
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// Arrange
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var transformer = new PassThroughTransformer();
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var reader = CreateMockReader(new[] { "A", "B", "C" });
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// Act
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var result = transformer.MapOrdinal(1, reader);
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// Assert
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Assert.Equal(1, result);
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}
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private static IDataReader CreateMockReader(string[] columns)
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{
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var reader = Substitute.For<IDataReader>();
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reader.FieldCount.Returns(columns.Length);
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for (int i = 0; i < columns.Length; i++)
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{
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var index = i;
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reader.GetName(index).Returns(columns[index]);
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reader.GetOrdinal(columns[index]).Returns(index);
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}
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return reader;
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}
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private class PassThroughTransformer : DataTransformerBase
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{
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public override string TransformerName => "PassThrough";
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}
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}
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