public void TestInstantiatedMethods()
{
MetadataType nonNestedType = (MetadataType)_testModule.GetType("Hashcode", "NonNestedType");
MetadataType genericType = (MetadataType)_testModule.GetType("Hashcode", "GenericType`2");
DefType intType = _context.GetWellKnownType(WellKnownType.Int32);
DefType stringType = _context.GetWellKnownType(WellKnownType.String);
MetadataType genericTypeOfIntString = genericType.MakeInstantiatedType(new Instantiation(new TypeDesc[] { intType, stringType }));
MetadataType genericTypeOfStringInt = genericType.MakeInstantiatedType(new Instantiation(new TypeDesc[] { stringType, intType }));
// build up expected hash codes for the above
int expHashNonNestedType = TypeHashingAlgorithms.ComputeNameHashCode("Hashcode.NonNestedType");
Assert.Equal(expHashNonNestedType, nonNestedType.GetHashCode());
int expHashGenType = TypeHashingAlgorithms.ComputeNameHashCode("Hashcode.GenericType`2");
Assert.Equal(expHashGenType, genericType.GetHashCode());
int expHashInt = TypeHashingAlgorithms.ComputeNameHashCode("System.Int32");
Assert.Equal(expHashInt, intType.GetHashCode());
int expHashString = TypeHashingAlgorithms.ComputeNameHashCode("System.String");
Assert.Equal(expHashString, stringType.GetHashCode());
int expHashGenTypeOfIS = TypeHashingAlgorithms.ComputeGenericInstanceHashCode(expHashGenType, new int[] { expHashInt, expHashString });
Assert.Equal(expHashGenTypeOfIS, genericTypeOfIntString.GetHashCode());
int expHashGenTypeOfSI = TypeHashingAlgorithms.ComputeGenericInstanceHashCode(expHashGenType, new int[] { expHashString, expHashInt });
Assert.Equal(expHashGenTypeOfSI, genericTypeOfStringInt.GetHashCode());
// Test that instantiated method's have the right hashes
int genMethodNameHash = TypeHashingAlgorithms.ComputeNameHashCode("GenericMethod");
int genMethodNameAndIHash = TypeHashingAlgorithms.ComputeGenericInstanceHashCode(genMethodNameHash, new int[] { expHashInt });
int genMethodNameAndSHash = TypeHashingAlgorithms.ComputeGenericInstanceHashCode(genMethodNameHash, new int[] { expHashString });
Action <MetadataType, int> testSequence = (MetadataType typeWithGenericMethod, int expectedTypeHash) =>
{
// Uninstantiated Generic method
MethodDesc genMethod = typeWithGenericMethod.GetMethod("GenericMethod", null);
Assert.Equal(TypeHashingAlgorithms.ComputeMethodHashCode(expectedTypeHash, genMethodNameHash), genMethod.GetHashCode());
// Instantiated over int
MethodDesc genMethodI = _context.GetInstantiatedMethod(genMethod, new Instantiation(new TypeDesc[] { intType }));
Assert.Equal(TypeHashingAlgorithms.ComputeMethodHashCode(expectedTypeHash, genMethodNameAndIHash), genMethodI.GetHashCode());
// Instantiated over string
MethodDesc genMethodS = _context.GetInstantiatedMethod(genMethod, new Instantiation(new TypeDesc[] { stringType }));
Assert.Equal(TypeHashingAlgorithms.ComputeMethodHashCode(expectedTypeHash, genMethodNameAndSHash), genMethodS.GetHashCode());
// Assert they aren't the same as the other hashes
Assert.NotEqual(genMethodI.GetHashCode(), genMethodS.GetHashCode());
Assert.NotEqual(genMethodI.GetHashCode(), genMethod.GetHashCode());
Assert.NotEqual(genMethodS.GetHashCode(), genMethod.GetHashCode());
};
// Test cases on non-generic type
testSequence(nonNestedType, expHashNonNestedType);
// Test cases on generic type
testSequence(genericType, expHashGenType);
// Test cases on instantiated generic type
testSequence(genericTypeOfIntString, expHashGenTypeOfIS);
testSequence(genericTypeOfStringInt, expHashGenTypeOfSI);
}
