File size: 2,026 Bytes
8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.Collections.Generic;
using System.Management.Automation.Language;
using Xunit;
namespace PSTests.Parallel
{
internal sealed class MyICustomAstVisitor2 : ICustomAstVisitor2
{
public object DefaultVisit(Ast ast) => ast.GetType().Name;
}
internal sealed class MyDefaultCustomAstVisitor2 : DefaultCustomAstVisitor2
{
public override object DefaultVisit(Ast ast) => ast.GetType().Name;
}
internal sealed class MyAstVisitor2 : AstVisitor2
{
public List<string> Commands { get; }
public MyAstVisitor2()
{
Commands = new List<string>();
}
public override AstVisitAction DefaultVisit(Ast ast)
{
if (ast is CommandAst commandAst && commandAst.CommandElements[0] is StringConstantExpressionAst str)
{
Commands.Add(str.Value);
}
return AstVisitAction.Continue;
}
}
public static class AstDefaultVisitTests
{
[Fact]
public static void TestCustomAstVisitor()
{
var ast = Parser.ParseInput("a | b", out _, out _);
var expected = nameof(NamedBlockAst);
var myVisitor1 = new MyICustomAstVisitor2();
var result1 = ast.EndBlock.Accept(myVisitor1);
Assert.Equal(expected, result1);
var myVisitor2 = new MyDefaultCustomAstVisitor2();
var result2 = ast.EndBlock.Accept(myVisitor2);
Assert.Equal(expected, result2);
}
[Fact]
public static void TestAstVisitor()
{
var ast = Parser.ParseInput("a | b", out _, out _);
var myVisitor = new MyAstVisitor2();
ast.Visit(myVisitor);
Assert.Equal(2, myVisitor.Commands.Count);
Assert.Equal("a", myVisitor.Commands[0]);
Assert.Equal("b", myVisitor.Commands[1]);
}
}
}
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