public void Apply_ShouldMergeTop(string targetXml, string transformXml, string expectedXml, IList<string> arguments)
{
var targetDocument = ArrangeTargetDocument(targetXml);
var transformElement = ArrangeTransformElement(targetDocument, transformXml);
var merge = new MergeBefore();
merge.Apply(targetDocument.DocumentElement, transformElement, arguments);
Assert.Equal(expectedXml, targetDocument.OuterXml);
}