public void PrevioustNameReturnsNullWhenPartNumberIsFirst()
{
// Arrange
DataChunk dataChunk = new DataChunk {
PartName = "test.jpg.part_1.10"
};
// Act
var result = dataChunk.PreviousName();
// Assert
Assert.Null(result);
}
public void PreviousNameReturnsSameNameWithPartNumberIncremented()
{
// Arrange
DataChunk dataChunk = new DataChunk {
PartName = "test.jpg.part_8.10"
};
// Act
var result = dataChunk.PreviousName();
// Assert
Assert.Equal("test.jpg.part_7.10", result);
}
