Antlr4.Runtime.Test.TestIntervalSet.TestSingleElementMinusDisjointSet C# (CSharp) Method

        public void TestSingleElementMinusDisjointSet()
        {
            IntervalSet s = IntervalSet.Of(15, 15);
            IntervalSet s2 = IntervalSet.Of(1, 5);
            s2.Add(10, 20);
            String expecting = "{}"; // 15 - {1..5, 10..20} = {}
            String result = s.Subtract(s2).ToString();
            Assert.AreEqual(expecting, result);
        }