feat(datasync): add RegexTransformer with Find & Replace mode

Initial implementation supporting: - Find & Replace mode with regex pattern and replacement string - Case-insensitive option - NonMatchBehavior enum for handling non-matches
2026-01-22 07:14:08 -05:00
parent f87805b931
commit cb41e42bb7
2 changed files with 167 additions and 0 deletions
@@ -0,0 +1,47 @@
+using System.Data;
+using JdeScoping.DataSync.Etl.Transformers;
+using NSubstitute;
+
+namespace JdeScoping.DataSync.Tests.Etl.Transformers;
+
+public class RegexTransformerTests
+{
+    [Fact]
+    public void FindReplace_RemovesPrefix()
+    {
+        // Arrange
+        var source = CreateMockReader(
+            columns: new[] { "BatchID", "Name" },
+            values: new object[] { "IIS_12345", "Test" });
+
+        var transformer = new RegexTransformer(
+            columnName: "BatchID",
+            pattern: "^IIS_",
+            replacement: "");
+
+        // Act
+        var reader = transformer.Transform(source);
+        source.Read().Returns(true);
+        reader.Read();
+
+        // Assert
+        Assert.Equal("12345", reader.GetValue(0));
+        Assert.Equal("Test", reader.GetValue(1)); // Other column unchanged
+    }
+
+    private static IDataReader CreateMockReader(string[] columns, object[] values)
+    {
+        var reader = Substitute.For<IDataReader>();
+        reader.FieldCount.Returns(columns.Length);
+        for (int i = 0; i < columns.Length; i++)
+        {
+            var index = i;
+            reader.GetName(index).Returns(columns[index]);
+            reader.GetOrdinal(columns[index]).Returns(index);
+            reader.GetFieldType(index).Returns(values[index]?.GetType() ?? typeof(object));
+            reader.GetValue(index).Returns(values[index]);
+            reader.IsDBNull(index).Returns(values[index] == null || values[index] == DBNull.Value);
+        }
+        return reader;
+    }
+}