// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Linq;
using Microsoft.CodeAnalysis.CSharp.Symbols;
using Microsoft.CodeAnalysis.CSharp.Symbols.Metadata.PE;
using Microsoft.CodeAnalysis.CSharp.Test.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.CSharp.UnitTests.Symbols.Metadata.PE
{
    public class LoadingMetadataTokens : CSharpTestBase
    {
        [Fact]
        public void LoadPESymbols()
        {
            var compilation = CreateCompilation(
@"
public class C
{
    public int f = 0;
 
    public int P { get; set; }
 
    public void M(int p)
    {
    }
 
    public void GM<T>()
    {
    }
 
    public event System.Action E;
}
 
public struct S
{
}",
                parseOptions: TestOptions.Regular.WithNoRefSafetyRulesAttribute());
 
            CompileAndVerify(compilation, symbolValidator: module =>
            {
                var peModule = (PEModuleSymbol)module;
 
                var assembly = peModule.ContainingAssembly;
                Assert.Equal(536870913, assembly.MetadataToken);
 
                var class1 = module.GlobalNamespace.GetTypeMember("C");
                Assert.Equal(33554434, class1.MetadataToken);
 
                var field = class1.GetMember("f");
                Assert.Equal(67108865, field.MetadataToken);
 
                var property = class1.GetMember("P");
                Assert.Equal(385875969, property.MetadataToken);
 
                var method = class1.GetMember("M");
                Assert.Equal(100663299, method.MetadataToken);
 
                var parameter = method.GetParameters().Single();
                Assert.Equal(134217730, parameter.MetadataToken);
 
                var genericMethod = class1.GetMember("GM");
                Assert.Equal(100663300, genericMethod.MetadataToken);
 
                var typeParameter = genericMethod.GetMemberTypeParameters().Single();
                Assert.Equal(704643073, typeParameter.MetadataToken);
 
                var event1 = class1.GetMember("E");
                Assert.Equal(335544321, event1.MetadataToken);
 
                var struct1 = module.GlobalNamespace.GetTypeMember("S");
                Assert.Equal(33554435, struct1.MetadataToken);
            });
        }
 
        [Fact]
        public void LoadSourceSymbols()
        {
            var compilation = CreateCompilation(
@"
public class C
{
    public int f = 0;
 
    public int P { get; set; }
 
    public void M(int p)
    {
    }
 
    public void GM<T>()
    {
    }
 
    public event System.Action E;
}
 
public struct S
{
}");
 
            var assembly = compilation.Assembly;
            Assert.Equal(0, assembly.MetadataToken);
 
            var class1 = compilation.GlobalNamespace.GetTypeMember("C");
            Assert.Equal(0, class1.MetadataToken);
 
            var field = class1.GetMember("f");
            Assert.Equal(0, field.MetadataToken);
 
            var property = class1.GetMember("P");
            Assert.Equal(0, property.MetadataToken);
 
            var method = class1.GetMember("M");
            Assert.Equal(0, method.MetadataToken);
 
            var parameter = method.GetParameters().Single();
            Assert.Equal(0, parameter.MetadataToken);
 
            var genericMethod = class1.GetMember("GM");
            Assert.Equal(0, genericMethod.MetadataToken);
 
            var typeParameter = genericMethod.GetMemberTypeParameters().Single();
            Assert.Equal(0, typeParameter.MetadataToken);
 
            var event1 = class1.GetMember("E");
            Assert.Equal(0, event1.MetadataToken);
 
            var struct1 = compilation.GlobalNamespace.GetTypeMember("S");
            Assert.Equal(0, struct1.MetadataToken);
        }
    }
}