public void IndentLineTest()
        {
            const int n = 3;
            const string expectedEnd = "Test";
            const char indent = '\t';

            var expected = new string( indent, n ) + expectedEnd;

            var line = new Line( n, expectedEnd );

            Assert.That( line.ToString( indent.ToString() ), Is.EqualTo( expected ) );
        }
        public void AppendTextTest()
        {
            const int n = 3;
            const string expectedEnd1 = "Test";
            const string expectedEnd2 = "Simple";
            const char indent = '\t';

            var expected = new string( indent, n ) + expectedEnd1 + expectedEnd2;

            var line = new Line( n, expectedEnd1 );
            line.Append( expectedEnd2 );

            Assert.That( line.ToString( indent.ToString() ), Is.EqualTo( expected ) );
        }