public void TestIntersect()
{
string str = "01234567";
StringSegment segFull = new StringSegment(str);
StringSegment segFirstHalf = new StringSegment(str, 0, 4);
StringSegment segLastHalf = new StringSegment(str, 4);
StringSegment segMiddle = new StringSegment(str, 2, 4);
StringSegment segSecondChar = new StringSegment(str, 1, 1);
StringSegment segLastChar = new StringSegment(str, 7, 1);
StringSegment segCenter = new StringSegment(str, 4, 0);
Assert.IsTrue(segFull.Intersect(segFull).IsIdenticalTo(segFull));
Assert.IsTrue(segFull.Intersect(segFirstHalf).IsIdenticalTo(segFirstHalf));
Assert.IsTrue(segFull.Intersect(segLastHalf).IsIdenticalTo(segLastHalf));
Assert.IsTrue(segFull.Intersect(segMiddle).IsIdenticalTo(segMiddle));
Assert.IsTrue(segFull.Intersect(segSecondChar).IsIdenticalTo(segSecondChar));
Assert.IsTrue(segFull.Intersect(segLastChar).IsIdenticalTo(segLastChar));
Assert.IsTrue(segFull.Intersect(segCenter).IsIdenticalTo(segCenter));
Assert.IsTrue(segFirstHalf.Intersect(segFull).IsIdenticalTo(segFirstHalf));
Assert.IsTrue(segFirstHalf.Intersect(segFirstHalf).IsIdenticalTo(segFirstHalf));
Assert.IsTrue(segFirstHalf.Intersect(segLastHalf).IsIdenticalTo(segCenter));
Assert.IsTrue(segFirstHalf.Intersect(segMiddle).IsIdenticalTo(new StringSegment(str, 2, 2)));
Assert.IsTrue(segFirstHalf.Intersect(segSecondChar).IsIdenticalTo(segSecondChar));
Assert.IsTrue(segFirstHalf.Intersect(segLastChar).IsIdenticalTo(new StringSegment(str, 7, 0)));
Assert.IsTrue(segFirstHalf.Intersect(segCenter).IsIdenticalTo(segCenter));
Assert.IsTrue(segLastHalf.Intersect(segFull).IsIdenticalTo(segLastHalf));
Assert.IsTrue(segLastHalf.Intersect(segFirstHalf).IsIdenticalTo(segCenter));
Assert.IsTrue(segLastHalf.Intersect(segLastHalf).IsIdenticalTo(segLastHalf));
Assert.IsTrue(segLastHalf.Intersect(segMiddle).IsIdenticalTo(new StringSegment(str, 4, 2)));
Assert.IsTrue(segLastHalf.Intersect(segSecondChar).IsIdenticalTo(segCenter));
Assert.IsTrue(segLastHalf.Intersect(segLastChar).IsIdenticalTo(segLastChar));
Assert.IsTrue(segLastHalf.Intersect(segCenter).IsIdenticalTo(segCenter));
Assert.IsTrue(segMiddle.Intersect(segFull).IsIdenticalTo(segMiddle));
Assert.IsTrue(segMiddle.Intersect(segFirstHalf).IsIdenticalTo(new StringSegment(str, 2, 2)));
Assert.IsTrue(segMiddle.Intersect(segLastHalf).IsIdenticalTo(new StringSegment(str, 4, 2)));
Assert.IsTrue(segMiddle.Intersect(segMiddle).IsIdenticalTo(segMiddle));
Assert.IsTrue(segMiddle.Intersect(segSecondChar).IsIdenticalTo(new StringSegment(str, 2, 0)));
Assert.IsTrue(segMiddle.Intersect(segLastChar).IsIdenticalTo(new StringSegment(str, 7, 0)));
Assert.IsTrue(segMiddle.Intersect(segCenter).IsIdenticalTo(segCenter));
Assert.IsTrue(segSecondChar.Intersect(segFull).IsIdenticalTo(segSecondChar));
Assert.IsTrue(segSecondChar.Intersect(segFirstHalf).IsIdenticalTo(segSecondChar));
Assert.IsTrue(segSecondChar.Intersect(segLastHalf).IsIdenticalTo(segCenter));
Assert.IsTrue(segSecondChar.Intersect(segMiddle).IsIdenticalTo(new StringSegment(str, 2, 0)));
Assert.IsTrue(segSecondChar.Intersect(segSecondChar).IsIdenticalTo(segSecondChar));
Assert.IsTrue(segSecondChar.Intersect(segLastChar).IsIdenticalTo(new StringSegment(str, 7, 0)));
Assert.IsTrue(segSecondChar.Intersect(segCenter).IsIdenticalTo(segCenter));
Assert.IsTrue(segLastChar.Intersect(segFull).IsIdenticalTo(segLastChar));
Assert.IsTrue(segLastChar.Intersect(segFirstHalf).IsIdenticalTo(new StringSegment(str, 7, 0)));
Assert.IsTrue(segLastChar.Intersect(segLastHalf).IsIdenticalTo(segLastChar));
Assert.IsTrue(segLastChar.Intersect(segMiddle).IsIdenticalTo(new StringSegment(str, 7, 0)));
Assert.IsTrue(segLastChar.Intersect(segSecondChar).IsIdenticalTo(new StringSegment(str, 7, 0)));
Assert.IsTrue(segLastChar.Intersect(segLastChar).IsIdenticalTo(segLastChar));
Assert.IsTrue(segLastChar.Intersect(segCenter).IsIdenticalTo(new StringSegment(str, 7, 0)));
Assert.IsTrue(segCenter.Intersect(segFull).IsIdenticalTo(segCenter));
Assert.IsTrue(segCenter.Intersect(segFirstHalf).IsIdenticalTo(segCenter));
Assert.IsTrue(segCenter.Intersect(segLastHalf).IsIdenticalTo(segCenter));
Assert.IsTrue(segCenter.Intersect(segMiddle).IsIdenticalTo(segCenter));
Assert.IsTrue(segCenter.Intersect(segSecondChar).IsIdenticalTo(segCenter));
Assert.IsTrue(segCenter.Intersect(segLastChar).IsIdenticalTo(new StringSegment(str, 7, 0)));
Assert.IsTrue(segCenter.Intersect(segCenter).IsIdenticalTo(segCenter));
}