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

        public void TestSubtractOfRangeSpanningMultipleRanges()
        {
            IntervalSet s = IntervalSet.Of(10, 20);
            s.Add(30, 40);
            s.Add(50, 60); // s has 3 ranges now: 10..20, 30..40, 50..60
            IntervalSet s2 = IntervalSet.Of(5, 55); // covers one and touches 2nd range
            String expecting = "{56..60}";
            String result = (s.Subtract(s2)).ToString();
            Assert.AreEqual(expecting, result);

            IntervalSet s3 = IntervalSet.Of(15, 55); // touches both
            expecting = "{10..14, 56..60}";
            result = (s.Subtract(s3)).ToString();
            Assert.AreEqual(expecting, result);
        }