antlr-3.4/runtime/CSharp2/Sources/Antlr3.Runtime.Tests/ITreeFixture.cs

/*
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Copyright (c) 2005-2007 Kunle Odutola
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namespace Antlr.Runtime.Tests
{
	using System;
	using StringBuilder = System.Text.StringBuilder;

	using IToken = Antlr.Runtime.IToken;
	using CommonToken = Antlr.Runtime.CommonToken;
	using ITree = Antlr.Runtime.Tree.ITree;
	using ITreeAdaptor = Antlr.Runtime.Tree.ITreeAdaptor;
	using CommonTree = Antlr.Runtime.Tree.CommonTree;
	using CommonTreeAdaptor = Antlr.Runtime.Tree.CommonTreeAdaptor;

	using MbUnit.Framework;

	[TestFixture]
	public class ITreeFixture : TestFixtureBase
	{
		#region CommonTree Tests

		[Test]
		public void testSingleNode()
		{
			CommonTree t = new CommonTree(new CommonToken(101));
			Assert.IsNull(t.Parent);
			Assert.AreEqual(-1, t.ChildIndex);
		}

		[Test]
		public void test4Nodes()
		{
			// ^(101 ^(102 103) 104)
			CommonTree r0 = new CommonTree(new CommonToken(101));
			r0.AddChild(new CommonTree(new CommonToken(102)));
			r0.GetChild(0).AddChild(new CommonTree(new CommonToken(103)));
			r0.AddChild(new CommonTree(new CommonToken(104)));

			Assert.IsNull(r0.Parent);
			Assert.AreEqual(-1, r0.ChildIndex);
		}

		[Test]
		public void testList()
		{
			// ^(nil 101 102 103)
			CommonTree r0 = new CommonTree((IToken)null);
			CommonTree c0, c1, c2;
			r0.AddChild(c0 = new CommonTree(new CommonToken(101)));
			r0.AddChild(c1 = new CommonTree(new CommonToken(102)));
			r0.AddChild(c2 = new CommonTree(new CommonToken(103)));

			Assert.IsNull(r0.Parent);
			Assert.AreEqual(-1, r0.ChildIndex);
			Assert.AreEqual(r0, c0.Parent);
			Assert.AreEqual(0, c0.ChildIndex);
			Assert.AreEqual(r0, c1.Parent);
			Assert.AreEqual(1, c1.ChildIndex);
			Assert.AreEqual(r0, c2.Parent);
			Assert.AreEqual(2, c2.ChildIndex);
		}

		[Test]
		public void testList2()
		{
			// Add child ^(nil 101 102 103) to root 5
			// should pull 101 102 103 directly to become 5's child list
			CommonTree root = new CommonTree(new CommonToken(5));

			// child tree
			CommonTree r0 = new CommonTree((IToken)null);
			CommonTree c0, c1, c2;
			r0.AddChild(c0 = new CommonTree(new CommonToken(101)));
			r0.AddChild(c1 = new CommonTree(new CommonToken(102)));
			r0.AddChild(c2 = new CommonTree(new CommonToken(103)));

			root.AddChild(r0);

			Assert.IsNull(root.Parent);
			Assert.AreEqual(-1, root.ChildIndex);
			// check children of root all point at root
			Assert.AreEqual(root, c0.Parent);
			Assert.AreEqual(0, c0.ChildIndex);
			Assert.AreEqual(root, c0.Parent);
			Assert.AreEqual(1, c1.ChildIndex);
			Assert.AreEqual(root, c0.Parent);
			Assert.AreEqual(2, c2.ChildIndex);
		}

		[Test]
		public void testAddListToExistChildren()
		{
			// Add child ^(nil 101 102 103) to root ^(5 6)
			// should add 101 102 103 to end of 5's child list
			CommonTree root = new CommonTree(new CommonToken(5));
			root.AddChild(new CommonTree(new CommonToken(6)));

			// child tree
			CommonTree r0 = new CommonTree((IToken)null);
			CommonTree c0, c1, c2;
			r0.AddChild(c0 = new CommonTree(new CommonToken(101)));
			r0.AddChild(c1 = new CommonTree(new CommonToken(102)));
			r0.AddChild(c2 = new CommonTree(new CommonToken(103)));

			root.AddChild(r0);

			Assert.IsNull(root.Parent);
			Assert.AreEqual(-1, root.ChildIndex);
			// check children of root all point at root
			Assert.AreEqual(root, c0.Parent);
			Assert.AreEqual(1, c0.ChildIndex);
			Assert.AreEqual(root, c0.Parent);
			Assert.AreEqual(2, c1.ChildIndex);
			Assert.AreEqual(root, c0.Parent);
			Assert.AreEqual(3, c2.ChildIndex);
		}

		[Test]
		public void testDupTree()
		{
			// ^(101 ^(102 103 ^(106 107) ) 104 105)
			CommonTree r0 = new CommonTree(new CommonToken(101));
			CommonTree r1 = new CommonTree(new CommonToken(102));
			r0.AddChild(r1);
			r1.AddChild(new CommonTree(new CommonToken(103)));
			ITree r2 = new CommonTree(new CommonToken(106));
			r2.AddChild(new CommonTree(new CommonToken(107)));
			r1.AddChild(r2);
			r0.AddChild(new CommonTree(new CommonToken(104)));
			r0.AddChild(new CommonTree(new CommonToken(105)));

			CommonTree dup = (CommonTree)(new CommonTreeAdaptor()).DupTree(r0);

			Assert.IsNull(dup.Parent);
			Assert.AreEqual(-1, dup.ChildIndex);
			dup.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testBecomeRoot()
		{
			// 5 becomes new root of ^(nil 101 102 103)
			CommonTree newRoot = new CommonTree(new CommonToken(5));

			CommonTree oldRoot = new CommonTree((IToken)null);
			oldRoot.AddChild(new CommonTree(new CommonToken(101)));
			oldRoot.AddChild(new CommonTree(new CommonToken(102)));
			oldRoot.AddChild(new CommonTree(new CommonToken(103)));

			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			adaptor.BecomeRoot(newRoot, oldRoot);
			newRoot.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testBecomeRoot2()
		{
			// 5 becomes new root of ^(101 102 103)
			CommonTree newRoot = new CommonTree(new CommonToken(5));

			CommonTree oldRoot = new CommonTree(new CommonToken(101));
			oldRoot.AddChild(new CommonTree(new CommonToken(102)));
			oldRoot.AddChild(new CommonTree(new CommonToken(103)));

			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			adaptor.BecomeRoot(newRoot, oldRoot);
			newRoot.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testBecomeRoot3()
		{
			// ^(nil 5) becomes new root of ^(nil 101 102 103)
			CommonTree newRoot = new CommonTree((IToken)null);
			newRoot.AddChild(new CommonTree(new CommonToken(5)));

			CommonTree oldRoot = new CommonTree((IToken)null);
			oldRoot.AddChild(new CommonTree(new CommonToken(101)));
			oldRoot.AddChild(new CommonTree(new CommonToken(102)));
			oldRoot.AddChild(new CommonTree(new CommonToken(103)));

			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			adaptor.BecomeRoot(newRoot, oldRoot);
			newRoot.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testBecomeRoot5()
		{
			// ^(nil 5) becomes new root of ^(101 102 103)
			CommonTree newRoot = new CommonTree((IToken)null);
			newRoot.AddChild(new CommonTree(new CommonToken(5)));

			CommonTree oldRoot = new CommonTree(new CommonToken(101));
			oldRoot.AddChild(new CommonTree(new CommonToken(102)));
			oldRoot.AddChild(new CommonTree(new CommonToken(103)));

			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			adaptor.BecomeRoot(newRoot, oldRoot);
			newRoot.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testBecomeRoot6()
		{
			// emulates construction of ^(5 6)
			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			CommonTree root_0 = (CommonTree)adaptor.Nil();
			CommonTree root_1 = (CommonTree)adaptor.Nil();
			root_1 = (CommonTree)adaptor.BecomeRoot(new CommonTree(new CommonToken(5)), root_1);

			adaptor.AddChild(root_1, new CommonTree(new CommonToken(6)));

			adaptor.AddChild(root_0, root_1);

			root_0.SanityCheckParentAndChildIndexes();
		}

		// Test replaceChildren

		[Test]
		public void testReplaceWithNoChildren()
		{
			CommonTree t = new CommonTree(new CommonToken(101));
			CommonTree newChild = new CommonTree(new CommonToken(5));
			bool error = false;
			try
			{
				t.ReplaceChildren(0, 0, newChild);
			}
			catch (Exception)
			{
				error = true;
			}
			Assert.IsTrue(error);
		}

		[Test]
		public void testReplaceWithOneChildren()
		{
			// assume token type 99 and use text
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			CommonTree c0 = new CommonTree(new CommonToken(99, "b"));
			t.AddChild(c0);

			CommonTree newChild = new CommonTree(new CommonToken(99, "c"));
			t.ReplaceChildren(0, 0, newChild);
			String expected = "(a c)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceInMiddle()
		{
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c"))); // index 1
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChild = new CommonTree(new CommonToken(99, "x"));
			t.ReplaceChildren(1, 1, newChild);
			String expected = "(a b x d)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceAtLeft()
		{
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b"))); // index 0
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChild = new CommonTree(new CommonToken(99, "x"));
			t.ReplaceChildren(0, 0, newChild);
			String expected = "(a x c d)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceAtRight()
		{
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d"))); // index 2

			CommonTree newChild = new CommonTree(new CommonToken(99, "x"));
			t.ReplaceChildren(2, 2, newChild);
			String expected = "(a b c x)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceOneWithTwoAtLeft()
		{
			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChildren = (CommonTree)adaptor.Nil();
			newChildren.AddChild(new CommonTree(new CommonToken(99, "x")));
			newChildren.AddChild(new CommonTree(new CommonToken(99, "y")));

			t.ReplaceChildren(0, 0, newChildren);
			String expected = "(a x y c d)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceOneWithTwoAtRight()
		{
			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChildren = (CommonTree)adaptor.Nil();
			newChildren.AddChild(new CommonTree(new CommonToken(99, "x")));
			newChildren.AddChild(new CommonTree(new CommonToken(99, "y")));

			t.ReplaceChildren(2, 2, newChildren);
			String expected = "(a b c x y)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceOneWithTwoInMiddle()
		{
			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChildren = (CommonTree)adaptor.Nil();
			newChildren.AddChild(new CommonTree(new CommonToken(99, "x")));
			newChildren.AddChild(new CommonTree(new CommonToken(99, "y")));

			t.ReplaceChildren(1, 1, newChildren);
			String expected = "(a b x y d)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceTwoWithOneAtLeft()
		{
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChild = new CommonTree(new CommonToken(99, "x"));

			t.ReplaceChildren(0, 1, newChild);
			String expected = "(a x d)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceTwoWithOneAtRight()
		{
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChild = new CommonTree(new CommonToken(99, "x"));

			t.ReplaceChildren(1, 2, newChild);
			String expected = "(a b x)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceAllWithOne()
		{
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChild = new CommonTree(new CommonToken(99, "x"));

			t.ReplaceChildren(0, 2, newChild);
			String expected = "(a x)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		[Test]
		public void testReplaceAllWithTwo()
		{
			ITreeAdaptor adaptor = new CommonTreeAdaptor();
			CommonTree t = new CommonTree(new CommonToken(99, "a"));
			t.AddChild(new CommonTree(new CommonToken(99, "b")));
			t.AddChild(new CommonTree(new CommonToken(99, "c")));
			t.AddChild(new CommonTree(new CommonToken(99, "d")));

			CommonTree newChildren = (CommonTree)adaptor.Nil();
			newChildren.AddChild(new CommonTree(new CommonToken(99, "x")));
			newChildren.AddChild(new CommonTree(new CommonToken(99, "y")));

			t.ReplaceChildren(0, 2, newChildren);
			String expected = "(a x y)";
			Assert.AreEqual(expected, t.ToStringTree());
			t.SanityCheckParentAndChildIndexes();
		}

		#endregion
	}
}