/
DirectReflectionMetadataProvider.cs
112 lines (98 loc) · 4.16 KB
/
DirectReflectionMetadataProvider.cs
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// ***********************************************************************
// Copyright (c) 2018 Charlie Poole, Terje Sandstrom
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// ***********************************************************************
using System;
using System.IO;
using System.Linq;
using System.Reflection;
using NUnit.VisualStudio.TestAdapter.Internal;
#if !NET35
using System.Runtime.Loader;
#endif
namespace NUnit.VisualStudio.TestAdapter.Metadata
{
internal sealed class DirectReflectionMetadataProvider : IMetadataProvider
{
public TypeInfo? GetDeclaringType(string assemblyPath, string reflectedTypeName, string methodName)
{
var type = TryGetSingleMethod(assemblyPath, reflectedTypeName, methodName)?.DeclaringType;
if (type == null) return null;
#if NET35
if (type.IsGenericType)
#else
if (type.IsConstructedGenericType)
#endif
{
type = type.GetGenericTypeDefinition();
}
return new TypeInfo(type);
}
public TypeInfo? GetStateMachineType(string assemblyPath, string reflectedTypeName, string methodName)
{
var method = TryGetSingleMethod(assemblyPath, reflectedTypeName, methodName);
if (method == null) return null;
var candidate = (Type)null;
foreach (var attributeData in CustomAttributeData.GetCustomAttributes(method))
{
for (var current = attributeData.Constructor.DeclaringType; current != null; current = current.GetTypeInfo().BaseType)
{
if (current.FullName != "System.Runtime.CompilerServices.StateMachineAttribute") continue;
var parameters = attributeData.Constructor.GetParameters();
for (var i = 0; i < parameters.Length; i++)
{
if (parameters[i].Name != "stateMachineType") continue;
if (attributeData.ConstructorArguments[i].Value is Type argument)
{
if (candidate != null)
return null;
candidate = argument;
}
}
}
}
if (candidate == null)
return null;
return new TypeInfo(candidate);
}
private static MethodInfo TryGetSingleMethod(string assemblyPath, string reflectedTypeName, string methodName)
{
try
{
#if !NET35
var assembly = AssemblyLoadContext.Default.LoadFromAssemblyPath(assemblyPath);
#else
var assembly = Assembly.LoadFrom(assemblyPath);
#endif
var type = assembly.GetType(reflectedTypeName, throwOnError: false);
var methods = type?.GetMethods().Where(m => m.Name == methodName).Take(2).ToList();
return methods?.Count == 1 ? methods[0] : null;
}
catch (FileNotFoundException)
{
return null;
}
}
void IDisposable.Dispose()
{
}
}
}