forked from dotnet/roslyn
/
SyntaxNodeTests.cs
2921 lines (2483 loc) · 120 KB
/
SyntaxNodeTests.cs
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// Copyright (c) Microsoft. All Rights Reserved. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Text;
using Roslyn.Test.Utilities;
using Xunit;
using InternalSyntax = Microsoft.CodeAnalysis.CSharp.Syntax.InternalSyntax;
namespace Microsoft.CodeAnalysis.CSharp.UnitTests
{
public class SyntaxNodeTests
{
[Fact]
public void TestQualifiedNameSyntaxWith()
{
// this is just a test to prove that at least one generate With method exists and functions correctly. :-)
var qname = (QualifiedNameSyntax)SyntaxFactory.ParseName("A.B");
var qname2 = qname.WithRight(SyntaxFactory.IdentifierName("C"));
var text = qname2.ToString();
Assert.Equal("A.C", text);
}
[WorkItem(9229, "DevDiv_Projects/Roslyn")]
[Fact]
public void TestAddBaseListTypes()
{
var cls = SyntaxFactory.ParseCompilationUnit("class C { }").Members[0] as ClassDeclarationSyntax;
var cls2 = cls.AddBaseListTypes(SyntaxFactory.SimpleBaseType(SyntaxFactory.ParseTypeName("B")));
}
[Fact]
public void TestChildNodes()
{
var text = "m(a,b,c)";
var expression = SyntaxFactory.ParseExpression(text);
var nodes = expression.ChildNodes().ToList();
Assert.Equal(2, nodes.Count);
Assert.Equal(SyntaxKind.IdentifierName, nodes[0].Kind());
Assert.Equal(SyntaxKind.ArgumentList, nodes[1].Kind());
}
[Fact]
public void TestAncestors()
{
var text = "a + (b - (c * (d / e)))";
var expression = SyntaxFactory.ParseExpression(text);
var e = expression.DescendantNodes().OfType<IdentifierNameSyntax>().First(n => n.Identifier.Text == "e");
var nodes = e.Ancestors().ToList();
Assert.Equal(7, nodes.Count);
Assert.Equal(SyntaxKind.DivideExpression, nodes[0].Kind());
Assert.Equal(SyntaxKind.ParenthesizedExpression, nodes[1].Kind());
Assert.Equal(SyntaxKind.MultiplyExpression, nodes[2].Kind());
Assert.Equal(SyntaxKind.ParenthesizedExpression, nodes[3].Kind());
Assert.Equal(SyntaxKind.SubtractExpression, nodes[4].Kind());
Assert.Equal(SyntaxKind.ParenthesizedExpression, nodes[5].Kind());
Assert.Equal(SyntaxKind.AddExpression, nodes[6].Kind());
}
[Fact]
public void TestAncestorsAndSelf()
{
var text = "a + (b - (c * (d / e)))";
var expression = SyntaxFactory.ParseExpression(text);
var e = expression.DescendantNodes().OfType<IdentifierNameSyntax>().First(n => n.Identifier.Text == "e");
var nodes = e.AncestorsAndSelf().ToList();
Assert.Equal(8, nodes.Count);
Assert.Equal(SyntaxKind.IdentifierName, nodes[0].Kind());
Assert.Equal(SyntaxKind.DivideExpression, nodes[1].Kind());
Assert.Equal(SyntaxKind.ParenthesizedExpression, nodes[2].Kind());
Assert.Equal(SyntaxKind.MultiplyExpression, nodes[3].Kind());
Assert.Equal(SyntaxKind.ParenthesizedExpression, nodes[4].Kind());
Assert.Equal(SyntaxKind.SubtractExpression, nodes[5].Kind());
Assert.Equal(SyntaxKind.ParenthesizedExpression, nodes[6].Kind());
Assert.Equal(SyntaxKind.AddExpression, nodes[7].Kind());
}
[Fact]
public void TestFirstAncestorOrSelf()
{
var text = "a + (b - (c * (d / e)))";
var expression = SyntaxFactory.ParseExpression(text);
var e = expression.DescendantNodes().OfType<IdentifierNameSyntax>().First(n => n.Identifier.Text == "e");
var firstParens = e.FirstAncestorOrSelf<ExpressionSyntax>(n => n.Kind() == SyntaxKind.ParenthesizedExpression);
Assert.NotNull(firstParens);
Assert.Equal("(d / e)", firstParens.ToString());
}
[Fact]
public void TestDescendantNodes()
{
var text = "#if true\r\n return true;";
var statement = SyntaxFactory.ParseStatement(text);
var nodes = statement.DescendantNodes().ToList();
Assert.Equal(1, nodes.Count);
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[0].Kind());
nodes = statement.DescendantNodes(descendIntoTrivia: true).ToList();
Assert.Equal(3, nodes.Count);
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodes[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[1].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[2].Kind());
nodes = statement.DescendantNodes(n => n is StatementSyntax).ToList();
Assert.Equal(1, nodes.Count);
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[0].Kind());
nodes = statement.DescendantNodes(n => n is StatementSyntax, descendIntoTrivia: true).ToList();
Assert.Equal(2, nodes.Count);
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodes[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[1].Kind());
// all over again with spans
nodes = statement.DescendantNodes(statement.FullSpan).ToList();
Assert.Equal(1, nodes.Count);
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[0].Kind());
nodes = statement.DescendantNodes(statement.FullSpan, descendIntoTrivia: true).ToList();
Assert.Equal(3, nodes.Count);
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodes[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[1].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[2].Kind());
nodes = statement.DescendantNodes(statement.FullSpan, n => n is StatementSyntax).ToList();
Assert.Equal(1, nodes.Count);
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[0].Kind());
nodes = statement.DescendantNodes(statement.FullSpan, n => n is StatementSyntax, descendIntoTrivia: true).ToList();
Assert.Equal(2, nodes.Count);
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodes[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[1].Kind());
}
[Fact]
public void TestDescendantNodesAndSelf()
{
var text = "#if true\r\n return true;";
var statement = SyntaxFactory.ParseStatement(text);
var nodes = statement.DescendantNodesAndSelf().ToList();
Assert.Equal(2, nodes.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodes[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[1].Kind());
nodes = statement.DescendantNodesAndSelf(descendIntoTrivia: true).ToList();
Assert.Equal(4, nodes.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodes[0].Kind());
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodes[1].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[2].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[3].Kind());
nodes = statement.DescendantNodesAndSelf(n => n is StatementSyntax).ToList();
Assert.Equal(2, nodes.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodes[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[1].Kind());
nodes = statement.DescendantNodesAndSelf(n => n is StatementSyntax, descendIntoTrivia: true).ToList();
Assert.Equal(3, nodes.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodes[0].Kind());
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodes[1].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[2].Kind());
// all over again with spans
nodes = statement.DescendantNodesAndSelf(statement.FullSpan).ToList();
Assert.Equal(2, nodes.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodes[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[1].Kind());
nodes = statement.DescendantNodesAndSelf(statement.FullSpan, descendIntoTrivia: true).ToList();
Assert.Equal(4, nodes.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodes[0].Kind());
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodes[1].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[2].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[3].Kind());
nodes = statement.DescendantNodesAndSelf(statement.FullSpan, n => n is StatementSyntax).ToList();
Assert.Equal(2, nodes.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodes[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[1].Kind());
nodes = statement.DescendantNodesAndSelf(statement.FullSpan, n => n is StatementSyntax, descendIntoTrivia: true).ToList();
Assert.Equal(3, nodes.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodes[0].Kind());
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodes[1].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodes[2].Kind());
}
[Fact]
public void TestDescendantNodesAndTokens()
{
var text = "#if true\r\n return true;";
var statement = SyntaxFactory.ParseStatement(text);
var nodesAndTokens = statement.DescendantNodesAndTokens().ToList();
Assert.Equal(4, nodesAndTokens.Count);
Assert.Equal(SyntaxKind.ReturnKeyword, nodesAndTokens[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodesAndTokens[1].Kind());
Assert.Equal(SyntaxKind.TrueKeyword, nodesAndTokens[2].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, nodesAndTokens[3].Kind());
nodesAndTokens = statement.DescendantNodesAndTokens(descendIntoTrivia: true).ToList();
Assert.Equal(10, nodesAndTokens.Count);
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodesAndTokens[0].Kind());
Assert.Equal(SyntaxKind.HashToken, nodesAndTokens[1].Kind());
Assert.Equal(SyntaxKind.IfKeyword, nodesAndTokens[2].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodesAndTokens[3].Kind());
Assert.Equal(SyntaxKind.TrueKeyword, nodesAndTokens[4].Kind());
Assert.Equal(SyntaxKind.EndOfDirectiveToken, nodesAndTokens[5].Kind());
Assert.Equal(SyntaxKind.ReturnKeyword, nodesAndTokens[6].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodesAndTokens[7].Kind());
Assert.Equal(SyntaxKind.TrueKeyword, nodesAndTokens[8].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, nodesAndTokens[9].Kind());
// with span
nodesAndTokens = statement.DescendantNodesAndTokens(statement.FullSpan).ToList();
Assert.Equal(4, nodesAndTokens.Count);
Assert.Equal(SyntaxKind.ReturnKeyword, nodesAndTokens[0].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodesAndTokens[1].Kind());
Assert.Equal(SyntaxKind.TrueKeyword, nodesAndTokens[2].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, nodesAndTokens[3].Kind());
}
[Fact]
public void TestDescendantNodesAndTokensAndSelf()
{
var text = "#if true\r\n return true;";
var statement = SyntaxFactory.ParseStatement(text);
var nodesAndTokens = statement.DescendantNodesAndTokensAndSelf().ToList();
Assert.Equal(5, nodesAndTokens.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodesAndTokens[0].Kind());
Assert.Equal(SyntaxKind.ReturnKeyword, nodesAndTokens[1].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodesAndTokens[2].Kind());
Assert.Equal(SyntaxKind.TrueKeyword, nodesAndTokens[3].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, nodesAndTokens[4].Kind());
nodesAndTokens = statement.DescendantNodesAndTokensAndSelf(descendIntoTrivia: true).ToList();
Assert.Equal(11, nodesAndTokens.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodesAndTokens[0].Kind());
Assert.Equal(SyntaxKind.IfDirectiveTrivia, nodesAndTokens[1].Kind());
Assert.Equal(SyntaxKind.HashToken, nodesAndTokens[2].Kind());
Assert.Equal(SyntaxKind.IfKeyword, nodesAndTokens[3].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodesAndTokens[4].Kind());
Assert.Equal(SyntaxKind.TrueKeyword, nodesAndTokens[5].Kind());
Assert.Equal(SyntaxKind.EndOfDirectiveToken, nodesAndTokens[6].Kind());
Assert.Equal(SyntaxKind.ReturnKeyword, nodesAndTokens[7].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodesAndTokens[8].Kind());
Assert.Equal(SyntaxKind.TrueKeyword, nodesAndTokens[9].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, nodesAndTokens[10].Kind());
// with span
nodesAndTokens = statement.DescendantNodesAndTokensAndSelf(statement.FullSpan).ToList();
Assert.Equal(5, nodesAndTokens.Count);
Assert.Equal(SyntaxKind.ReturnStatement, nodesAndTokens[0].Kind());
Assert.Equal(SyntaxKind.ReturnKeyword, nodesAndTokens[1].Kind());
Assert.Equal(SyntaxKind.TrueLiteralExpression, nodesAndTokens[2].Kind());
Assert.Equal(SyntaxKind.TrueKeyword, nodesAndTokens[3].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, nodesAndTokens[4].Kind());
}
[Fact]
public void TestDescendantNodesAndTokensAndSelfForEmptyCompilationUnit()
{
var text = "";
var cu = SyntaxFactory.ParseCompilationUnit(text);
var nodesAndTokens = cu.DescendantNodesAndTokensAndSelf().ToList();
Assert.Equal(2, nodesAndTokens.Count);
Assert.Equal(SyntaxKind.CompilationUnit, nodesAndTokens[0].Kind());
Assert.Equal(SyntaxKind.EndOfFileToken, nodesAndTokens[1].Kind());
}
[Fact]
public void TestDescendantNodesAndTokensAndSelfForDocumentationComment()
{
var text = "/// Foo\r\n x";
var expr = SyntaxFactory.ParseExpression(text);
var nodesAndTokens = expr.DescendantNodesAndTokensAndSelf(descendIntoTrivia: true).ToList();
Assert.Equal(7, nodesAndTokens.Count);
Assert.Equal(SyntaxKind.IdentifierName, nodesAndTokens[0].Kind());
Assert.Equal(SyntaxKind.SingleLineDocumentationCommentTrivia, nodesAndTokens[1].Kind());
Assert.Equal(SyntaxKind.XmlText, nodesAndTokens[2].Kind());
Assert.Equal(SyntaxKind.XmlTextLiteralToken, nodesAndTokens[3].Kind());
Assert.Equal(SyntaxKind.XmlTextLiteralNewLineToken, nodesAndTokens[4].Kind());
Assert.Equal(SyntaxKind.EndOfDocumentationCommentToken, nodesAndTokens[5].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, nodesAndTokens[6].Kind());
}
[Fact]
public void TestGetAllDirectivesUsingDescendantNodes()
{
var text = "#if false\r\n eat a sandwich\r\n#endif\r\n x";
var expr = SyntaxFactory.ParseExpression(text);
var directives = expr.GetDirectives();
var descendantDirectives = expr.DescendantNodesAndSelf(n => n.ContainsDirectives, descendIntoTrivia: true).OfType<DirectiveTriviaSyntax>().ToList();
Assert.Equal(directives.Count, descendantDirectives.Count);
for (int i = 0; i < directives.Count; i++)
{
Assert.Equal(directives[i], descendantDirectives[i]);
}
}
[Fact]
public void TestGetAllAnnotatedNodesUsingDescendantNodes()
{
var text = "a + (b - (c * (d / e)))";
var expr = SyntaxFactory.ParseExpression(text);
var myAnnotation = new SyntaxAnnotation();
var identifierNodes = expr.DescendantNodes().OfType<IdentifierNameSyntax>().ToList();
var exprWithAnnotations = expr.ReplaceNodes(identifierNodes, (e, e2) => e2.WithAdditionalAnnotations(myAnnotation));
var nodesWithMyAnnotations = exprWithAnnotations.DescendantNodesAndSelf(n => n.ContainsAnnotations).Where(n => n.HasAnnotation(myAnnotation)).ToList();
Assert.Equal(identifierNodes.Count, nodesWithMyAnnotations.Count);
for (int i = 0; i < identifierNodes.Count; i++)
{
// compare text because node identity changed when adding the annotation
Assert.Equal(identifierNodes[i].ToString(), nodesWithMyAnnotations[i].ToString());
}
}
[Fact]
public void TestDescendantTokens()
{
var s1 = "using Foo;";
var t1 = SyntaxFactory.ParseSyntaxTree(s1);
var tokens = t1.GetCompilationUnitRoot().DescendantTokens().ToList();
Assert.Equal(4, tokens.Count);
Assert.Equal(SyntaxKind.UsingKeyword, tokens[0].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, tokens[1].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, tokens[2].Kind());
Assert.Equal(SyntaxKind.EndOfFileToken, tokens[3].Kind());
}
[Fact]
public void TestDescendantTokensWithExtraWhitespace()
{
var s1 = " using Foo ; ";
var t1 = SyntaxFactory.ParseSyntaxTree(s1);
var tokens = t1.GetCompilationUnitRoot().DescendantTokens().ToList();
Assert.Equal(4, tokens.Count);
Assert.Equal(SyntaxKind.UsingKeyword, tokens[0].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, tokens[1].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, tokens[2].Kind());
Assert.Equal(SyntaxKind.EndOfFileToken, tokens[3].Kind());
}
[Fact]
public void TestDescendantTokensEntireRange()
{
var s1 = "extern alias Bar;\r\n" + "using Foo;";
var t1 = SyntaxFactory.ParseSyntaxTree(s1);
var tokens = t1.GetCompilationUnitRoot().DescendantTokens().ToList();
Assert.Equal(8, tokens.Count);
Assert.Equal(SyntaxKind.ExternKeyword, tokens[0].Kind());
Assert.Equal(SyntaxKind.AliasKeyword, tokens[1].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, tokens[2].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, tokens[3].Kind());
Assert.Equal(SyntaxKind.UsingKeyword, tokens[4].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, tokens[5].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, tokens[6].Kind());
Assert.Equal(SyntaxKind.EndOfFileToken, tokens[7].Kind());
}
[Fact]
public void TestDescendantTokensOverFullSpan()
{
var s1 = "extern alias Bar;\r\n" + "using Foo;";
var t1 = SyntaxFactory.ParseSyntaxTree(s1);
var tokens = t1.GetCompilationUnitRoot().DescendantTokens(new TextSpan(0, 16)).ToList();
Assert.Equal(3, tokens.Count);
Assert.Equal(SyntaxKind.ExternKeyword, tokens[0].Kind());
Assert.Equal(SyntaxKind.AliasKeyword, tokens[1].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, tokens[2].Kind());
}
[Fact]
public void TestDescendantTokensOverInsideSpan()
{
var s1 = "extern alias Bar;\r\n" + "using Foo;";
var t1 = SyntaxFactory.ParseSyntaxTree(s1);
var tokens = t1.GetCompilationUnitRoot().DescendantTokens(new TextSpan(1, 14)).ToList();
Assert.Equal(3, tokens.Count);
Assert.Equal(SyntaxKind.ExternKeyword, tokens[0].Kind());
Assert.Equal(SyntaxKind.AliasKeyword, tokens[1].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, tokens[2].Kind());
}
[Fact]
public void TestDescendantTokensOverFullSpanOffset()
{
var s1 = "extern alias Bar;\r\n" + "using Foo;";
var t1 = SyntaxFactory.ParseSyntaxTree(s1);
var tokens = t1.GetCompilationUnitRoot().DescendantTokens(new TextSpan(7, 17)).ToList();
Assert.Equal(4, tokens.Count);
Assert.Equal(SyntaxKind.AliasKeyword, tokens[0].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, tokens[1].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, tokens[2].Kind());
Assert.Equal(SyntaxKind.UsingKeyword, tokens[3].Kind());
}
[Fact]
public void TestDescendantTokensOverInsideSpanOffset()
{
var s1 = "extern alias Bar;\r\n" + "using Foo;";
var t1 = SyntaxFactory.ParseSyntaxTree(s1);
var tokens = t1.GetCompilationUnitRoot().DescendantTokens(new TextSpan(8, 15)).ToList();
Assert.Equal(4, tokens.Count);
Assert.Equal(SyntaxKind.AliasKeyword, tokens[0].Kind());
Assert.Equal(SyntaxKind.IdentifierToken, tokens[1].Kind());
Assert.Equal(SyntaxKind.SemicolonToken, tokens[2].Kind());
Assert.Equal(SyntaxKind.UsingKeyword, tokens[3].Kind());
}
[Fact]
public void TestDescendantTrivia()
{
var text = "// foo\r\na + b";
var expr = SyntaxFactory.ParseExpression(text);
var list = expr.DescendantTrivia().ToList();
Assert.Equal(4, list.Count);
Assert.Equal(SyntaxKind.SingleLineCommentTrivia, list[0].Kind());
Assert.Equal(SyntaxKind.EndOfLineTrivia, list[1].Kind());
Assert.Equal(SyntaxKind.WhitespaceTrivia, list[2].Kind());
Assert.Equal(SyntaxKind.WhitespaceTrivia, list[3].Kind());
}
[Fact]
public void TestDescendantTriviaIntoStructuredTrivia()
{
var text = @"
/// <foo >
/// </foo>
a + b";
var expr = SyntaxFactory.ParseExpression(text);
var list = expr.DescendantTrivia(descendIntoTrivia: true).ToList();
Assert.Equal(7, list.Count);
Assert.Equal(SyntaxKind.EndOfLineTrivia, list[0].Kind());
Assert.Equal(SyntaxKind.SingleLineDocumentationCommentTrivia, list[1].Kind());
Assert.Equal(SyntaxKind.DocumentationCommentExteriorTrivia, list[2].Kind());
Assert.Equal(SyntaxKind.WhitespaceTrivia, list[3].Kind());
Assert.Equal(SyntaxKind.DocumentationCommentExteriorTrivia, list[4].Kind());
Assert.Equal(SyntaxKind.WhitespaceTrivia, list[5].Kind());
Assert.Equal(SyntaxKind.WhitespaceTrivia, list[6].Kind());
}
[Fact]
public void Bug877223()
{
var s1 = "using Foo;";
var t1 = SyntaxFactory.ParseSyntaxTree(s1);
// var node = t1.GetCompilationUnitRoot().Usings[0].GetTokens(new TextSpan(6, 3)).First();
var node = t1.GetCompilationUnitRoot().DescendantTokens(new TextSpan(6, 3)).First();
Assert.Equal(node.ToString(), "Foo");
}
[Fact]
public void TestFindToken()
{
var text = "class\n #if XX\n#endif\n foo { }";
var tree = SyntaxFactory.ParseSyntaxTree(text);
var token = tree.GetCompilationUnitRoot().FindToken("class\n #i".Length);
Assert.Equal(SyntaxKind.IdentifierToken, token.Kind());
Assert.Equal("foo", token.ToString());
token = tree.GetCompilationUnitRoot().FindToken("class\n #i".Length, findInsideTrivia: true);
Assert.Equal(SyntaxKind.IfKeyword, token.Kind());
}
[Fact]
public void TestFindTokenInLargeList()
{
var identifier = SyntaxFactory.Identifier("x");
var missingIdentifier = SyntaxFactory.MissingToken(SyntaxKind.IdentifierToken);
var name = SyntaxFactory.IdentifierName(identifier);
var missingName = SyntaxFactory.IdentifierName(missingIdentifier);
var comma = SyntaxFactory.Token(SyntaxKind.CommaToken);
var missingComma = SyntaxFactory.MissingToken(SyntaxKind.CommaToken);
var argument = SyntaxFactory.Argument(name);
var missingArgument = SyntaxFactory.Argument(missingName);
// make a large list that has lots of zero-length nodes (that shouldn't be found)
var nodesAndTokens = SyntaxFactory.NodeOrTokenList(
missingArgument, missingComma,
missingArgument, missingComma,
missingArgument, missingComma,
missingArgument, missingComma,
missingArgument, missingComma,
missingArgument, missingComma,
missingArgument, missingComma,
missingArgument, missingComma,
argument);
var argumentList = SyntaxFactory.ArgumentList(SyntaxFactory.SeparatedList<ArgumentSyntax>(SyntaxFactory.NodeOrTokenList(nodesAndTokens)));
var invocation = SyntaxFactory.InvocationExpression(name, argumentList);
CheckFindToken(invocation);
}
private void CheckFindToken(SyntaxNode node)
{
for (int i = node.FullSpan.End - 1; i >= 0; i--)
{
var token = node.FindToken(i);
Assert.Equal(true, token.FullSpan.Contains(i));
}
}
[WorkItem(755236, "DevDiv")]
[Fact]
public void TestFindNode()
{
var text = "class\n #if XX\n#endif\n foo { }\n class bar { }";
var tree = SyntaxFactory.ParseSyntaxTree(text);
var root = tree.GetRoot();
Assert.Equal(root, root.FindNode(root.Span, findInsideTrivia: false));
Assert.Equal(root, root.FindNode(root.Span, findInsideTrivia: true));
var classDecl = (TypeDeclarationSyntax)root.ChildNodes().First();
// IdentifierNameSyntax in trivia.
var identifier = root.DescendantNodes(descendIntoTrivia: true).Single(n => n is IdentifierNameSyntax);
var position = identifier.Span.Start + 1;
Assert.Equal(classDecl, root.FindNode(identifier.Span, findInsideTrivia: false));
Assert.Equal(identifier, root.FindNode(identifier.Span, findInsideTrivia: true));
// Token span.
Assert.Equal(classDecl, root.FindNode(classDecl.Identifier.Span, findInsideTrivia: false));
// EOF Token span.
var EOFSpan = new TextSpan(root.FullSpan.End, 0);
Assert.Equal(root, root.FindNode(EOFSpan, findInsideTrivia: false));
Assert.Equal(root, root.FindNode(EOFSpan, findInsideTrivia: true));
// EOF Invalid span for childnode
var classDecl2 = (TypeDeclarationSyntax)root.ChildNodes().Last();
Assert.Throws<ArgumentOutOfRangeException>(() => classDecl2.FindNode(EOFSpan));
// Check end position included in node span
var nodeEndPositionSpan = new TextSpan(classDecl.FullSpan.End, 0);
Assert.Equal(classDecl2, root.FindNode(nodeEndPositionSpan, findInsideTrivia: false));
Assert.Equal(classDecl2, root.FindNode(nodeEndPositionSpan, findInsideTrivia: true));
Assert.Equal(classDecl2, classDecl2.FindNode(nodeEndPositionSpan, findInsideTrivia: false));
Assert.Equal(classDecl2, classDecl2.FindNode(nodeEndPositionSpan, findInsideTrivia: true));
Assert.Throws<ArgumentOutOfRangeException>(() => classDecl.FindNode(nodeEndPositionSpan));
// Invalid spans.
var invalidSpan = new TextSpan(100, 100);
Assert.Throws<ArgumentOutOfRangeException>(() => root.FindNode(invalidSpan));
invalidSpan = new TextSpan(root.FullSpan.End - 1, 2);
Assert.Throws<ArgumentOutOfRangeException>(() => root.FindNode(invalidSpan));
invalidSpan = new TextSpan(classDecl2.FullSpan.Start - 1, root.FullSpan.End);
Assert.Throws<ArgumentOutOfRangeException>(() => classDecl2.FindNode(invalidSpan));
invalidSpan = new TextSpan(classDecl.FullSpan.End, root.FullSpan.End);
Assert.Throws<ArgumentOutOfRangeException>(() => classDecl2.FindNode(invalidSpan));
// Parent node's span.
Assert.Throws<ArgumentOutOfRangeException>(() => classDecl.FindNode(root.FullSpan));
}
[WorkItem(539941, "DevDiv")]
[Fact]
public void TestFindTriviaNoTriviaExistsAtPosition()
{
var code = @"class Foo
{
void Bar()
{
}
}";
var tree = SyntaxFactory.ParseSyntaxTree(code);
var position = tree.GetText().Lines[2].End - 1;
// position points to the closing parenthesis on the line that has "void Bar()"
// There should be no trivia at this position
var trivia = tree.GetCompilationUnitRoot().FindTrivia(position);
Assert.Equal(SyntaxKind.None, trivia.Kind());
Assert.Equal(0, trivia.SpanStart);
Assert.Equal(0, trivia.Span.End);
Assert.Equal(default(SyntaxTrivia), trivia);
}
[Fact]
public void TestTreeEquivalentToSelf()
{
var text = "class foo { }";
var tree = SyntaxFactory.ParseSyntaxTree(text);
Assert.True(tree.GetCompilationUnitRoot().IsEquivalentTo(tree.GetCompilationUnitRoot()));
}
[Fact]
public void TestTreeNotEquivalentToNull()
{
var text = "class foo { }";
var tree = SyntaxFactory.ParseSyntaxTree(text);
Assert.False(tree.GetCompilationUnitRoot().IsEquivalentTo(null));
}
[Fact]
public void TestTreesFromSameSourceEquivalent()
{
var text = "class foo { }";
var tree1 = SyntaxFactory.ParseSyntaxTree(text);
var tree2 = SyntaxFactory.ParseSyntaxTree(text);
Assert.NotEqual(tree1.GetCompilationUnitRoot(), tree2.GetCompilationUnitRoot());
Assert.True(tree1.GetCompilationUnitRoot().IsEquivalentTo(tree2.GetCompilationUnitRoot()));
}
[Fact]
public void TestDifferentTreesNotEquivalent()
{
var tree1 = SyntaxFactory.ParseSyntaxTree("class foo { }");
var tree2 = SyntaxFactory.ParseSyntaxTree("class bar { }");
Assert.NotEqual(tree1.GetCompilationUnitRoot(), tree2.GetCompilationUnitRoot());
Assert.False(tree1.GetCompilationUnitRoot().IsEquivalentTo(tree2.GetCompilationUnitRoot()));
}
[Fact]
public void TestVastlyDifferentTreesNotEquivalent()
{
var tree1 = SyntaxFactory.ParseSyntaxTree("class foo { }");
var tree2 = SyntaxFactory.ParseSyntaxTree(string.Empty);
Assert.NotEqual(tree1.GetCompilationUnitRoot(), tree2.GetCompilationUnitRoot());
Assert.False(tree1.GetCompilationUnitRoot().IsEquivalentTo(tree2.GetCompilationUnitRoot()));
}
[Fact]
public void TestSimilarSubtreesEquivalent()
{
var tree1 = SyntaxFactory.ParseSyntaxTree("class foo { void M() { } }");
var tree2 = SyntaxFactory.ParseSyntaxTree("class bar { void M() { } }");
var m1 = ((TypeDeclarationSyntax)tree1.GetCompilationUnitRoot().Members[0]).Members[0];
var m2 = ((TypeDeclarationSyntax)tree2.GetCompilationUnitRoot().Members[0]).Members[0];
Assert.Equal(SyntaxKind.MethodDeclaration, m1.Kind());
Assert.Equal(SyntaxKind.MethodDeclaration, m2.Kind());
Assert.NotEqual(m1, m2);
Assert.True(m1.IsEquivalentTo(m2));
}
[Fact]
public void TestTreesWithDifferentTriviaAreNotEquivalent()
{
var tree1 = SyntaxFactory.ParseSyntaxTree("class foo {void M() { }}");
var tree2 = SyntaxFactory.ParseSyntaxTree("class foo { void M() { } }");
Assert.False(tree1.GetCompilationUnitRoot().IsEquivalentTo(tree2.GetCompilationUnitRoot()));
}
[Fact, WorkItem(536664, "DevDiv")]
public void TestTriviaNodeCached()
{
var tree = SyntaxFactory.ParseSyntaxTree(" class foo {}");
// get to the trivia node
var trivia = tree.GetCompilationUnitRoot().Members[0].GetLeadingTrivia()[0];
// we get the trivia again
var triviaAgain = tree.GetCompilationUnitRoot().Members[0].GetLeadingTrivia()[0];
// should NOT return two distinct objects for trivia and triviaAgain - struct now.
Assert.True(SyntaxTrivia.Equals(trivia, triviaAgain));
}
[Fact]
public void TestGetFirstToken()
{
var tree = SyntaxFactory.ParseSyntaxTree("public static class foo { }");
var first = tree.GetCompilationUnitRoot().GetFirstToken();
Assert.Equal(SyntaxKind.PublicKeyword, first.Kind());
}
[Fact]
public void TestGetFirstTokenIncludingZeroWidth()
{
var tree = SyntaxFactory.ParseSyntaxTree("public static class foo { }");
var first = tree.GetCompilationUnitRoot().GetFirstToken(includeZeroWidth: true);
Assert.Equal(SyntaxKind.PublicKeyword, first.Kind());
}
[Fact]
public void TestGetLastToken()
{
var tree = SyntaxFactory.ParseSyntaxTree("public static class foo { }");
var last = tree.GetCompilationUnitRoot().GetLastToken();
Assert.Equal(SyntaxKind.CloseBraceToken, last.Kind());
}
[Fact]
public void TestGetLastTokenIncludingZeroWidth()
{
var tree = SyntaxFactory.ParseSyntaxTree("public static class foo { ");
var last = tree.GetCompilationUnitRoot().GetLastToken(includeZeroWidth: true);
Assert.Equal(SyntaxKind.EndOfFileToken, last.Kind());
last = tree.GetCompilationUnitRoot().Members[0].GetLastToken(includeZeroWidth: true);
Assert.Equal(SyntaxKind.CloseBraceToken, last.Kind());
Assert.True(last.IsMissing);
Assert.Equal(26, last.FullSpan.Start);
}
[Fact]
public void TestReverseChildSyntaxList()
{
var tree1 = SyntaxFactory.ParseSyntaxTree("class A {} public class B {} public static class C {}");
var root1 = tree1.GetCompilationUnitRoot();
TestReverse(root1.ChildNodesAndTokens());
TestReverse(root1.Members[0].ChildNodesAndTokens());
TestReverse(root1.Members[1].ChildNodesAndTokens());
TestReverse(root1.Members[2].ChildNodesAndTokens());
}
private void TestReverse(ChildSyntaxList children)
{
var list1 = children.AsEnumerable().Reverse().ToList();
var list2 = children.Reverse().ToList();
Assert.Equal(list1.Count, list2.Count);
for (int i = 0; i < list1.Count; i++)
{
Assert.Equal(list1[i], list2[i]);
Assert.Equal(list1[i].FullSpan.Start, list2[i].FullSpan.Start);
}
}
[Fact]
public void TestGetNextToken()
{
var tree = SyntaxFactory.ParseSyntaxTree("public static class foo { }");
var tokens = tree.GetCompilationUnitRoot().DescendantTokens().ToList();
var list = new List<SyntaxToken>();
var token = tree.GetCompilationUnitRoot().GetFirstToken(includeSkipped: true);
while (token.Kind() != SyntaxKind.None)
{
list.Add(token);
token = token.GetNextToken(includeSkipped: true);
}
// descendant tokens include EOF
Assert.Equal(tokens.Count - 1, list.Count);
for (int i = 0; i < list.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetNextTokenIncludingSkippedTokens()
{
var text =
@"garbage
using foo.bar;
";
var tree = SyntaxFactory.ParseSyntaxTree(text);
Assert.Equal(text, tree.GetCompilationUnitRoot().ToFullString());
var tokens = tree.GetCompilationUnitRoot().DescendantTokens(descendIntoTrivia: true).Where(SyntaxToken.NonZeroWidth).ToList();
Assert.Equal(6, tokens.Count);
Assert.Equal("garbage", tokens[0].Text);
var list = new List<SyntaxToken>(tokens.Count);
var token = tree.GetCompilationUnitRoot().GetFirstToken(includeSkipped: true);
while (token.Kind() != SyntaxKind.None)
{
list.Add(token);
token = token.GetNextToken(includeSkipped: true);
}
Assert.Equal(tokens.Count, list.Count);
for (int i = 0; i < tokens.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetNextTokenExcludingSkippedTokens()
{
var tree = SyntaxFactory.ParseSyntaxTree(
@"garbage
using foo.bar;
");
var tokens = tree.GetCompilationUnitRoot().DescendantTokens().ToList();
Assert.Equal(6, tokens.Count);
var list = new List<SyntaxToken>(tokens.Count);
var token = tree.GetCompilationUnitRoot().GetFirstToken(includeSkipped: false);
while (token.Kind() != SyntaxKind.None)
{
list.Add(token);
token = token.GetNextToken(includeSkipped: false);
}
// descendant tokens includes EOF
Assert.Equal(tokens.Count - 1, list.Count);
for (int i = 0; i < list.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetNextTokenCommon()
{
SyntaxTree syntaxTree = SyntaxFactory.ParseSyntaxTree("public static class foo { }");
List<SyntaxToken> tokens = syntaxTree.GetRoot().DescendantTokens().ToList();
List<SyntaxToken> list = new List<SyntaxToken>();
SyntaxToken token = syntaxTree.GetRoot().GetFirstToken();
while (token.RawKind != 0)
{
list.Add(token);
token = token.GetNextToken();
}
// descendant tokens includes EOF
Assert.Equal(tokens.Count - 1, list.Count);
for (int i = 0; i < list.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetPreviousToken()
{
var tree = SyntaxFactory.ParseSyntaxTree("public static class foo { }");
var tokens = tree.GetCompilationUnitRoot().DescendantTokens().ToList();
var list = new List<SyntaxToken>();
var token = tree.GetCompilationUnitRoot().GetLastToken(); // skip EOF
while (token.Kind() != SyntaxKind.None)
{
list.Add(token);
token = token.GetPreviousToken();
}
list.Reverse();
// descendant tokens includes EOF
Assert.Equal(tokens.Count - 1, list.Count);
for (int i = 0; i < list.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetPreviousTokenIncludingSkippedTokens()
{
var text =
@"garbage
using foo.bar;
";
var tree = SyntaxFactory.ParseSyntaxTree(text);
Assert.Equal(text, tree.GetCompilationUnitRoot().ToFullString());
var tokens = tree.GetCompilationUnitRoot().DescendantTokens(descendIntoTrivia: true).Where(SyntaxToken.NonZeroWidth).ToList();
Assert.Equal(6, tokens.Count);
Assert.Equal("garbage", tokens[0].Text);
var list = new List<SyntaxToken>(tokens.Count);
var token = tree.GetCompilationUnitRoot().GetLastToken(includeSkipped: true);
while (token.Kind() != SyntaxKind.None)
{
list.Add(token);
token = token.GetPreviousToken(includeSkipped: true);
}
list.Reverse();
Assert.Equal(tokens.Count, list.Count);
for (int i = 0; i < tokens.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetPreviousTokenExcludingSkippedTokens()
{
var text =
@"garbage
using foo.bar;
";
var tree = SyntaxFactory.ParseSyntaxTree(text);
Assert.Equal(text, tree.GetCompilationUnitRoot().ToFullString());
var tokens = tree.GetCompilationUnitRoot().DescendantTokens().ToList();
Assert.Equal(6, tokens.Count);
var list = new List<SyntaxToken>(tokens.Count);
var token = tree.GetCompilationUnitRoot().GetLastToken(includeSkipped: false);
while (token.Kind() != SyntaxKind.None)
{
list.Add(token);
token = token.GetPreviousToken(includeSkipped: false);
}
list.Reverse();
// descendant tokens includes EOF
Assert.Equal(tokens.Count, list.Count + 1);
for (int i = 0; i < list.Count; i++)
{
Assert.Equal(tokens[i], list[i]);
}
}
[Fact]
public void TestGetPreviousTokenCommon()
{
SyntaxTree syntaxTree = SyntaxFactory.ParseSyntaxTree("public static class foo { }");
List<SyntaxToken> tokens = syntaxTree.GetRoot().DescendantTokens().ToList();
List<SyntaxToken> list = new List<SyntaxToken>();
var token = syntaxTree.GetRoot().GetLastToken(includeZeroWidth: false); // skip EOF
while (token.RawKind != 0)
{
list.Add(token);
token = token.GetPreviousToken();
}
list.Reverse();
// descendant tokens include EOF
Assert.Equal(tokens.Count - 1, list.Count);
for (int i = 0; i < list.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetNextTokenIncludingZeroWidth()
{
var tree = SyntaxFactory.ParseSyntaxTree("public static class foo {");
var tokens = tree.GetCompilationUnitRoot().DescendantTokens().ToList();
var list = new List<SyntaxToken>();
var token = tree.GetCompilationUnitRoot().GetFirstToken(includeZeroWidth: true);
while (token.Kind() != SyntaxKind.None)
{
list.Add(token);
token = token.GetNextToken(includeZeroWidth: true);
}
Assert.Equal(tokens.Count, list.Count);
for (int i = 0; i < tokens.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetNextTokenIncludingZeroWidthCommon()
{
SyntaxTree syntaxTree = SyntaxFactory.ParseSyntaxTree("public static class foo {");
List<SyntaxToken> tokens = syntaxTree.GetRoot().DescendantTokens().ToList();
List<SyntaxToken> list = new List<SyntaxToken>();
SyntaxToken token = syntaxTree.GetRoot().GetFirstToken(includeZeroWidth: true);
while (token.RawKind != 0)
{
list.Add(token);
token = token.GetNextToken(includeZeroWidth: true);
}
Assert.Equal(tokens.Count, list.Count);
for (int i = 0; i < tokens.Count; i++)
{
Assert.Equal(list[i], tokens[i]);
}
}
[Fact]
public void TestGetPreviousTokenIncludingZeroWidth()
{
var tree = SyntaxFactory.ParseSyntaxTree("public static class foo {");
var tokens = tree.GetCompilationUnitRoot().DescendantTokens().ToList();
var list = new List<SyntaxToken>();
var token = tree.GetCompilationUnitRoot().EndOfFileToken.GetPreviousToken(includeZeroWidth: true);
while (token.Kind() != SyntaxKind.None)
{
list.Add(token);
token = token.GetPreviousToken(includeZeroWidth: true);
}
list.Reverse();