public ResolvedConstructor(
IEnumerable <Type> parameterTypes,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
this.Arguments = ResolveArguments(parameterTypes, resolver, resolutionContext);
}
public ResolvedConstructor(
IEnumerable<Type> parameterTypes,
DummyCreationSession session,
IDummyValueResolver resolver)
{
this.Arguments = ResolveArguments(parameterTypes, session, resolver);
}
public CreationResult CreateFake(
Type typeOfFake,
IProxyOptions proxyOptions,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
if (!CastleDynamicProxyGenerator.CanGenerateProxy(typeOfFake, out string?reasonCannotGenerate))
{
return(CreationResult.FailedToCreateFake(typeOfFake, reasonCannotGenerate));
}
if (proxyOptions.ArgumentsForConstructor is not null)
{
var proxyGeneratorResult = this.GenerateProxy(typeOfFake, proxyOptions, proxyOptions.ArgumentsForConstructor);
return(proxyGeneratorResult.ProxyWasSuccessfullyGenerated
? CreationResult.SuccessfullyCreated(proxyGeneratorResult.GeneratedProxy)
: CreationResult.FailedToCreateFake(typeOfFake, proxyGeneratorResult.ReasonForFailure !));
}
return(this.TryCreateFakeWithDummyArgumentsForConstructor(
typeOfFake,
proxyOptions,
resolver,
resolutionContext));
}
private static IEnumerable <ResolvedArgument> ResolveArguments(
IEnumerable <Type> parameterTypes,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
var resolvedArguments = new List <ResolvedArgument>();
foreach (var parameterType in parameterTypes)
{
var resolvedArgument = new ResolvedArgument(parameterType);
try
{
var creationResult = resolver.TryResolveDummyValue(parameterType, resolutionContext);
resolvedArgument.WasResolved = creationResult.WasSuccessful;
if (creationResult.WasSuccessful)
{
resolvedArgument.ResolvedValue = creationResult.Result;
}
}
catch
{
resolvedArgument.WasResolved = false;
}
resolvedArguments.Add(resolvedArgument);
}
return(resolvedArguments);
}
private static void StubResolverToFailForType <T>(IDummyValueResolver resolver)
{
object outResult;
A.CallTo(() => resolver.TryResolveDummyValue(A <DummyCreationSession> ._, typeof(T), out outResult))
.Returns(false);
}
public override CreationResult TryCreateDummyValue(
Type typeOfDummy,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
return(this.creationResult);
}
private static IEnumerable<ResolvedArgument> ResolveArguments(
IEnumerable<Type> parameterTypes,
DummyCreationSession session,
IDummyValueResolver resolver)
{
var resolvedArguments = new List<ResolvedArgument>();
foreach (var parameterType in parameterTypes)
{
var resolvedArgument = new ResolvedArgument { ArgumentType = parameterType };
try
{
var creationResult = resolver.TryResolveDummyValue(session, parameterType);
resolvedArgument.WasResolved = creationResult.WasSuccessful;
if (creationResult.WasSuccessful)
{
resolvedArgument.ResolvedValue = creationResult.Result;
}
}
catch
{
resolvedArgument.WasResolved = false;
}
resolvedArguments.Add(resolvedArgument);
}
return resolvedArguments;
}
private static Lazy <T> CreateLazyDummy <T>(IDummyValueResolver resolver)
{
return(new Lazy <T>(() =>
{
var creationResult = resolver.TryResolveDummyValue(typeof(T), new LoopDetectingResolutionContext());
return creationResult.WasSuccessful
? (T)creationResult.Result !
: default !;
private static void StubResolverWithDummyValue <T>(IDummyValueResolver resolver, T dummyValue)
{
object outResult;
A.CallTo(() => resolver.TryResolveDummyValue(A <DummyCreationSession> ._, typeof(T), out outResult))
.Returns(true)
.AssignsOutAndRefParameters(dummyValue);
}
public override CreationResult TryCreateDummyValue(Type typeOfDummy, IDummyValueResolver resolver)
{
var success = this.DummyFactory.TryCreateDummyObject(typeOfDummy, out object result);
return(success
? CreationResult.SuccessfullyCreated(result)
: CreationResult.FailedToCreateDummy(typeOfDummy, "No Dummy Factory produced a result."));
}
public override CreationResult TryCreateDummyValue(Type typeOfDummy, IDummyValueResolver resolver)
{
if (typeOfDummy.GetTypeInfo().IsValueType&& typeOfDummy != typeof(void))
{
return(CreationResult.SuccessfullyCreated(Activator.CreateInstance(typeOfDummy)));
}
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It is not a value type."));
}
public override CreationResult TryCreateDummyValue(Type typeOfDummy, IDummyValueResolver resolver)
{
if (typeof(Delegate).IsAssignableFrom(typeOfDummy))
{
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It is a Delegate."));
}
if (typeOfDummy.GetTypeInfo().IsAbstract)
{
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It is abstract."));
}
// Save the constructors as we try them. Avoids eager evaluation and double evaluation
// of constructors enumerable.
var consideredConstructors = new List <ResolvedConstructor>();
if (this.cachedConstructors.TryGetValue(typeOfDummy, out ConstructorInfo cachedConstructor))
{
var resolvedConstructor = new ResolvedConstructor(
cachedConstructor.GetParameters().Select(pi => pi.ParameterType),
resolver);
if (resolvedConstructor.WasSuccessfullyResolved)
{
if (TryCreateDummyValueUsingConstructor(cachedConstructor, resolvedConstructor, out object result))
{
return(CreationResult.SuccessfullyCreated(result));
}
consideredConstructors.Add(resolvedConstructor);
}
}
else
{
foreach (var constructor in GetConstructorsInOrder(typeOfDummy))
{
var resolvedConstructor = new ResolvedConstructor(
constructor.GetParameters().Select(pi => pi.ParameterType),
resolver);
if (resolvedConstructor.WasSuccessfullyResolved && TryCreateDummyValueUsingConstructor(constructor, resolvedConstructor, out object result))
{
this.cachedConstructors[typeOfDummy] = constructor;
return(CreationResult.SuccessfullyCreated(result));
}
consideredConstructors.Add(resolvedConstructor);
}
}
if (consideredConstructors.Any())
{
return(CreationResult.FailedToCreateDummy(typeOfDummy, consideredConstructors));
}
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It has no public constructors."));
}
private CreationResult TryCreateFakeWithDummyArgumentsForConstructor(
Type typeOfFake,
IProxyOptions proxyOptions,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
// Save the constructors as we try them. Avoids eager evaluation and double evaluation
// of constructors enumerable.
var consideredConstructors = new List <ResolvedConstructor>();
if (this.parameterTypesCache.TryGetValue(typeOfFake, out Type[]? cachedParameterTypes))
public override CreationResult TryCreateDummyValue(
Type typeOfDummy,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
return(this.FakeCreator.CreateFakeWithoutLoopDetection(
typeOfDummy,
new ProxyOptions(),
resolver,
resolutionContext));
}
public override CreationResult TryCreateDummyValue(
Type typeOfDummy,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
var proxyOptions = this.ProxyOptionsFactory.BuildProxyOptions(typeOfDummy, null);
return(this.FakeCreator.CreateFakeWithoutLoopDetection(
typeOfDummy,
proxyOptions,
resolver,
resolutionContext));
}
public CreationResult CreateFakeWithoutLoopDetection(
Type typeOfFake,
IProxyOptions proxyOptions,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
if (typeOfFake.IsInterface)
{
return(this.defaultCreationStrategy.CreateFakeInterface(typeOfFake, proxyOptions));
}
return(DelegateCreationStrategy.IsResponsibleForCreating(typeOfFake)
? this.delegateCreationStrategy.CreateFake(typeOfFake, proxyOptions)
: this.defaultCreationStrategy.CreateFake(typeOfFake, proxyOptions, resolver, resolutionContext));
}
public override CreationResult TryCreateDummyValue(
Type typeOfDummy,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
if (typeOfDummy.GetTypeInfo().IsGenericType&& typeOfDummy.GetGenericTypeDefinition() == typeof(Lazy <>))
{
var typeOfLazyResult = typeOfDummy.GetGenericArguments()[0];
var method = CreateLazyDummyGenericDefinition.MakeGenericMethod(typeOfLazyResult);
var dummy = method.Invoke(null, new object[] { resolver });
return(CreationResult.SuccessfullyCreated(dummy));
}
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It is not a Lazy."));
}
public override CreationResult TryCreateDummyValue(
Type typeOfDummy,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
if (typeOfDummy == typeof(Task))
{
return(CreationResult.SuccessfullyCreated(TaskHelper.CompletedTask));
}
if (typeOfDummy.IsGenericType && typeOfDummy.GetGenericTypeDefinition() == typeof(Task <>))
{
var typeOfTaskResult = typeOfDummy.GetGenericArguments()[0];
var creationResult = resolver.TryResolveDummyValue(typeOfTaskResult, resolutionContext);
object?taskResult = creationResult.WasSuccessful
? creationResult.Result
: typeOfTaskResult.GetDefaultValue();
var method = GenericFromResultMethodDefinition.MakeGenericMethod(typeOfTaskResult);
return(CreationResult.SuccessfullyCreated(method.Invoke(null, new[] { taskResult })));
}
if (typeOfDummy.FullName == "System.Threading.Tasks.ValueTask")
{
return(CreationResult.SuccessfullyCreated(typeOfDummy.GetDefaultValue()));
}
if (typeOfDummy.IsGenericType &&
!typeOfDummy.IsGenericTypeDefinition &&
typeOfDummy.FullName is string fullName &&
fullName.StartsWith("System.Threading.Tasks.ValueTask`", StringComparison.Ordinal))
{
var typeOfTaskResult = typeOfDummy.GetGenericArguments()[0];
var creationResult = resolver.TryResolveDummyValue(typeOfTaskResult, resolutionContext);
object?taskResult = creationResult.WasSuccessful
? creationResult.Result
: typeOfTaskResult.GetDefaultValue();
var ctor = typeOfDummy.GetConstructor(new[] { typeOfTaskResult }) !;
return(CreationResult.SuccessfullyCreated(ctor.Invoke(new[] { taskResult })));
}
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It is not a Task."));
}
public override CreationResult TryCreateDummyValue(Type typeOfDummy, IDummyValueResolver resolver)
{
if (typeOfDummy.GetTypeInfo().IsGenericType&& typeOfDummy.GetGenericTypeDefinition() == typeof(Lazy <>))
{
var typeOfLazyResult = typeOfDummy.GetGenericArguments()[0];
var creationResult = resolver.TryResolveDummyValue(typeOfLazyResult);
object lazyResult = creationResult.WasSuccessful
? creationResult.Result
: typeOfLazyResult.GetDefaultValue();
var funcType = typeof(Func <>).MakeGenericType(typeOfLazyResult);
var method = CreateGenericFromResultMethodDefinition().MakeGenericMethod(typeOfLazyResult);
var func = method.Invoke(null, new[] { lazyResult });
var dummy = typeOfDummy.GetConstructor(new[] { funcType, typeof(bool) }).Invoke(new[] { func, true });
return(CreationResult.SuccessfullyCreated(dummy));
}
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It is not a Lazy."));
}
public override CreationResult TryCreateDummyValue(Type typeOfDummy, IDummyValueResolver resolver, LoopDetectingResolutionContext resolutionContext)
{
if (IsTuple(typeOfDummy))
{
var argTypes = typeOfDummy.GetTypeInfo().GetGenericArguments();
var args = new object[argTypes.Length];
for (int i = 0; i < argTypes.Length; i++)
{
var argType = argTypes[i];
var creationResult = resolver.TryResolveDummyValue(argType, resolutionContext);
args[i] = creationResult.WasSuccessful
? creationResult.Result
: argType.GetDefaultValue();
}
var dummy = Activator.CreateInstance(typeOfDummy, args);
return(CreationResult.SuccessfullyCreated(dummy));
}
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It is not a tuple."));
}
public override CreationResult TryCreateDummyValue(Type typeOfDummy, IDummyValueResolver resolver)
{
if (typeOfDummy == typeof(Task))
{
return(CreationResult.SuccessfullyCreated(TaskHelper.FromResult(default(object))));
}
if (typeOfDummy.GetTypeInfo().IsGenericType&& typeOfDummy.GetGenericTypeDefinition() == typeof(Task <>))
{
var typeOfTaskResult = typeOfDummy.GetGenericArguments()[0];
var creationResult = resolver.TryResolveDummyValue(typeOfTaskResult);
object taskResult = creationResult.WasSuccessful
? creationResult.Result
: typeOfTaskResult.GetDefaultValue();
var method = GenericFromResultMethodDefinition.MakeGenericMethod(typeOfTaskResult);
return(CreationResult.SuccessfullyCreated(method.Invoke(null, new[] { taskResult })));
}
return(CreationResult.FailedToCreateDummy(typeOfDummy, "It is not a Task."));
}
public CreationResult CreateFake(
Type typeOfFake,
IProxyOptions proxyOptions,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
if (!resolutionContext.TryBeginToResolve(typeOfFake))
{
return(CreationResult.FailedToCreateFake(typeOfFake, "Recursive dependency detected. Already resolving " + typeOfFake + '.'));
}
var result = this.CreateFakeWithoutLoopDetection(
typeOfFake,
proxyOptions,
resolver,
resolutionContext);
if (result.WasSuccessful)
{
resolutionContext.OnSuccessfulResolve(typeOfFake);
}
return(result);
}
public CreationResult CreateFake(
Type typeOfFake,
IProxyOptions proxyOptions,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext)
{
if (!resolutionContext.TryBeginToResolve(typeOfFake))
{
return(CreationResult.FailedToCreateFake(typeOfFake, "Recursive dependency detected. Already resolving " + typeOfFake + '.'));
}
try
{
return(this.CreateFakeWithoutLoopDetection(
typeOfFake,
proxyOptions,
resolver,
resolutionContext));
}
finally
{
resolutionContext.EndResolve(typeOfFake);
}
}
public DefaultFakeAndDummyManager(IDummyValueResolver dummyValueResolver, FakeObjectCreator fakeCreator, DynamicOptionsBuilder dynamicOptionsBuilder)
{
this.dummyValueResolver = dummyValueResolver;
this.fakeCreator = fakeCreator;
this.dynamicOptionsBuilder = dynamicOptionsBuilder;
}
public abstract CreationResult TryCreateDummyValue(
Type typeOfDummy,
IDummyValueResolver resolver,
LoopDetectingResolutionContext resolutionContext);
private static ResolvedConstructor ResolveConstructorArguments(Type[] parameterTypes, DummyCreationSession session, IDummyValueResolver resolver)
{
if (parameterTypes == null)
{
return(new ResolvedConstructor());
}
var resolvedArguments = new List <ResolvedArgument>();
foreach (var parameterType in parameterTypes)
{
bool wasResolved;
object result = null;
try
{
wasResolved = resolver.TryResolveDummyValue(session, parameterType, out result);
}
catch
{
wasResolved = false;
}
var resolvedArgument = new ResolvedArgument
{
WasResolved = wasResolved,
ResolvedValue = result,
ArgumentType = parameterType
};
resolvedArguments.Add(resolvedArgument);
}
return(new ResolvedConstructor
{
Arguments = resolvedArguments.ToArray()
});
}
public CreationResult CreateFake(Type typeOfFake, IProxyOptions proxyOptions, DummyCreationSession session, IDummyValueResolver resolver)
{
if (proxyOptions.Attributes.Any())
{
return(CreationResult.FailedToCreateFake(typeOfFake, "Faked delegates cannot have custom attributes applied to them."));
}
if (proxyOptions.ArgumentsForConstructor != null && proxyOptions.ArgumentsForConstructor.Any())
{
return(CreationResult.FailedToCreateFake(typeOfFake, "Faked delegates cannot be made using explicit constructor arguments."));
}
if (proxyOptions.AdditionalInterfacesToImplement.Any())
{
return(CreationResult.FailedToCreateFake(typeOfFake, "Faked delegates cannot be made to implement additional interfaces."));
}
var fakeCallProcessorProvider = this.fakeCallProcessorProviderFactory(typeOfFake, proxyOptions);
var proxyGeneratorResult = DelegateProxyGenerator.GenerateProxy(typeOfFake, fakeCallProcessorProvider);
return(proxyGeneratorResult.ProxyWasSuccessfullyGenerated
? CreationResult.SuccessfullyCreated(proxyGeneratorResult.GeneratedProxy)
: CreationResult.FailedToCreateFake(typeOfFake, proxyGeneratorResult.ReasonForFailure));
}
public CreationResult CreateFake(Type typeOfFake, IProxyOptions proxyOptions, DummyCreationSession session, IDummyValueResolver resolver) => this.strategies.First(s => s.IsResponsibleForCreating(typeOfFake)).CreateFake(typeOfFake, proxyOptions, session, resolver);
private static void StubResolverWithDummyValue <T>(IDummyValueResolver resolver, T dummyValue)
{
A.CallTo(() => resolver.TryResolveDummyValue(typeof(T)))
.Returns(CreationResult.SuccessfullyCreated(dummyValue));
}
public FakeAndDummyManager(IDummyValueResolver dummyValueResolver, IFakeObjectCreator fakeCreator, ImplicitOptionsBuilderCatalogue implicitOptionsBuilderCatalogue)
{
this.dummyValueResolver = dummyValueResolver;
this.fakeCreator = fakeCreator;
this.implicitOptionsBuilderCatalogue = implicitOptionsBuilderCatalogue;
}
