public void ShouldMergeIntoSring()
{
// arrange
var data = new[] { 1, 2, 3 };
// act
var result = data.Fold((agg, i) => agg + i, string.Empty);
// assert
Assert.Equal("123", result);
}
public void ShouldSumAllNumbers()
{
// arrange
var data = new[] { 1, 2, 3 };
// act
var result = data.Fold((agg, i) => agg + i, 0);
// assert
Assert.Equal(6, result);
}