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using NUnit.Framework;
using System;
using System.Linq;
namespace Mono.Cecil.Tests {
[TestFixture]
public class MethodReferenceComparerTests : LoadAssemblyDefinitionForTestsBaseSimple {
private TypeDefinition _class1;
private TypeDefinition _class2;
[SetUp]
public void SetUp ()
{
SetupAssemblyDefinitions (typeof (MethodReferenceComparerTests).Assembly);
_class1 = TypeDefinitionUtils.TypeDefinitionFor (typeof (Class1), _assembly);
_class2 = TypeDefinitionUtils.TypeDefinitionFor (typeof (Class2), _assembly);
}
[Test]
public void MethodReferenceEqualsMethodDefinition ()
{
var typeDefinition = TypeDefinitionUtils.TypeDefinitionFor (typeof (Int32), _mscorlib);
var method = typeDefinition.Methods.Single (m => m.Name == "GetHashCode");
var methodReference = new MethodReference (method.Name, method.ReturnType, method.DeclaringType);
methodReference.HasThis = method.HasThis;
Assert.That (MethodReferenceComparer.AreEqual (method, methodReference), Is.True);
}
[Test]
public void VerifyMethodSignatureMatches ()
{
Assert.IsTrue (CompareSignatures ("MethodWithNoParametersOrReturn"));
Assert.IsTrue (CompareSignatures ("GenericMethodWithNoParametersOrReturn"));
Assert.IsFalse (CompareSignatures ("MethodWithNoParametersOrReturn", "GenericMethodWithNoParametersOrReturn"));
Assert.IsTrue (CompareSignatures ("MethodWithIntParameterAndVoidReturn"));
}
[Test]
public void VerifySignatureComparisonConsidersStatic ()
{
Assert.IsTrue (CompareSignatures ("StaticMethodWithNoParametersOrReturn"));
Assert.IsTrue (CompareSignatures ("StaticMethodWithNoParametersOrReturn"));
Assert.IsFalse (CompareSignatures ("MethodWithNoParametersOrReturn", "StaticMethodWithNoParametersOrReturn"));
Assert.IsFalse (CompareSignatures ("GenericMethodWithNoParametersOrReturn", "GenericStaticMethodWithNoParametersOrReturn"));
}
[Test]
public void VerifyMethodSignatureWithGenericParameters ()
{
Assert.IsTrue (CompareSignatures ("GenericMethodWithGenericParameter"));
Assert.IsTrue (CompareSignatures ("GenericMethodWithGenericParameterArray"));
Assert.IsTrue (CompareSignatures ("GenericMethodWithByReferenceGenericParameter"));
Assert.IsTrue (CompareSignatures ("GenericMethodWithGenericInstanceGenericParameter"));
}
[Test]
public void VerifyNonResolvableMethodReferencesWithDifferentParameterTypesAreNotEqual ()
{
var method1 = new MethodReference ("TestMethod", _class1.Module.TypeSystem.Void, _class1);
method1.Parameters.Add (new ParameterDefinition (new ByReferenceType (_class1.Module.TypeSystem.Int16)));
var method2 = new MethodReference ("TestMethod", _class1.Module.TypeSystem.Void, _class1);
method2.Parameters.Add (new ParameterDefinition (new ByReferenceType (_class1.Module.TypeSystem.Char)));
Assert.IsFalse (MethodReferenceComparer.AreEqual (method1, method2));
}
[Test]
public void VerifyNonResolvableRecursiveMethodsDontStackOverflow ()
{
var method1 = new MethodReference ("TestMethod", _class1.Module.TypeSystem.Void, _class1);
method1.GenericParameters.Add (new GenericParameter (method1));
method1.Parameters.Add (new ParameterDefinition (method1.GenericParameters[0]));
var method2 = new MethodReference ("TestMethod", _class1.Module.TypeSystem.Void, _class1);
method2.GenericParameters.Add (new GenericParameter (method2));
method2.Parameters.Add (new ParameterDefinition (method2.GenericParameters[0]));
Assert.IsTrue (MethodReferenceComparer.AreEqual (method1, method2));
}
bool CompareSignatures (string name)
{
return CompareSignatures (name, name);
}
bool CompareSignatures (string name1, string name2)
{
return MethodReferenceComparer.AreSignaturesEqual (GetMethod (_class1, name1), GetMethod (_class2, name2), TypeComparisonMode.SignatureOnly);
}
static MethodDefinition GetMethod (TypeDefinition type, string name)
{
return type.Methods.Single (m => m.Name == name);
}
class GenericClass<T> {
}
class Class1 {
void MethodWithNoParametersOrReturn () {}
void GenericMethodWithNoParametersOrReturn<T> () {}
static void StaticMethodWithNoParametersOrReturn () {}
static void GenericStaticMethodWithNoParametersOrReturn<T> () {}
void MethodWithIntParameterAndVoidReturn (int a) {}
void GenericMethodWithGenericParameter<T> (T t) {}
void GenericMethodWithGenericParameterArray<T> (T[] t) {}
void GenericMethodWithByReferenceGenericParameter<T> (ref T a) {}
void GenericMethodWithGenericInstanceGenericParameter<T> (GenericClass<T> a) {}
}
class Class2 {
void MethodWithNoParametersOrReturn () {}
void GenericMethodWithNoParametersOrReturn<T> () {}
static void StaticMethodWithNoParametersOrReturn () {}
static void GenericStaticMethodWithNoParametersOrReturn<T> () {}
void MethodWithIntParameterAndVoidReturn (int a) {}
void GenericMethodWithGenericParameter<T> (T t) {}
void GenericMethodWithGenericParameterArray<T> (T[] t) {}
void GenericMethodWithByReferenceGenericParameter<T> (ref T a) {}
void GenericMethodWithGenericInstanceGenericParameter<T> (GenericClass<T> a) {}
}
}
}
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