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

        public void TestSubtractOfOverlappingRangeFromLeft()
        {
            IntervalSet s = IntervalSet.Of(10, 20);
            IntervalSet s2 = IntervalSet.Of(5, 11);
            String expecting = "{12..20}";
            String result = (s.Subtract(s2)).ToString();
            Assert.AreEqual(expecting, result);

            IntervalSet s3 = IntervalSet.Of(5, 10);
            expecting = "{11..20}";
            result = (s.Subtract(s3)).ToString();
            Assert.AreEqual(expecting, result);
        }