public void can_do_something_up_to_n_times()
	{
	    var count = 0;
	    5.UpTo(7, i => count += i);
	    count.ShouldEqual(18);
	}

	public void can_get_greatest_common_denominator()
	{
	    72.Gcd(168).ShouldEqual(24);
	    19.Gcd(36).ShouldEqual(1);
	}

    public void can_capitalize()
    {
        "hello".Capitalize().ShouldEqual("Hello");
    }

    public void can_center()
    {
        "hello".Center(4).ShouldEqual("hello");
        "hello".Center(5).ShouldEqual("hello");
        "hello".Center(7).ShouldEqual(" hello ");
        "hello".Center(8).ShouldEqual(" hello  ");
        "hello".Center(9, '-').ShouldEqual("--hello--");
    }

    public void can_chomp()
    {
        "hello".Chomp().ShouldEqual("hello");
        "hello\r ".Chomp().ShouldEqual("hello");
        "hello \r\n".Chomp().ShouldEqual("hello");            
    }

    public void can_perform_action_on_each_line()
    {
        var builder = new StringBuilder();
        ("Hello there." + Environment.NewLine + "How are you?")
            .EachLine(l => builder.Append(l));
        builder.ToString().ShouldEndWith("Hello there.How are you?");
    }

    public void can_ljust()
    {
        "hello".LJust(4).ShouldEqual("hello");
        "hello".LJust(20).ShouldEqual("hello               ");
        "hello".LJust(20, "1234").ShouldEqual("hello123412341234123");   
    }