public void OnlyActionForTheSameIndexedParameterTypeIsCalledOnSwitch()
{
foreach (var(result, value, valueType) in AllResultsToTest())
{
var resultType = result.GetType();
var delegateMonitor = new DelegateMonitor();
var voidDelegates = GetAllTypes(resultType)
.Select(genericType => DelegateCreator.CreateDelegate(
delegateMonitor,
nameof(DelegateMonitor.NoOperation),
true,
typeof(Action <>),
genericType))
.Cast <object>()
.ToArray();
var switchMethod = resultType.GetMethods().Single(method => method.Name == "Switch" && !method.IsGenericMethod);
if (switchMethod == null)
{
throw new InvalidOperationException("Switch method not found");
}
switchMethod.Invoke(result, voidDelegates);
Assert.AreEqual(1, delegateMonitor.TotalCalls);
Assert.AreEqual(1, delegateMonitor.GetCalls(valueType));
}
}
public void WhenConstructedWithFailureTypeTryMapWillReturnFalseAndProvideDefaultValue()
{
foreach (var resultType in AllResultTypesToTest())
{
var successType = GetSuccessType(resultType);
foreach (var failureType in GetFailureTypes(resultType))
{
foreach (var value in TestData.GetPossibleValues(failureType))
{
var result = CreateResult(resultType, failureType, value);
var delegateMonitor = new DelegateMonitor();
var genericTryMapMethod = resultType.GetMethod("TryMap");
if (genericTryMapMethod == null)
{
throw new MissingMethodException("TryMap method is expected to be implemented");
}
var tryMapMethod = genericTryMapMethod.MakeGenericMethod(typeof(string));
var createStringDelegate =
DelegateCreator.CreateDelegate(
delegateMonitor,
nameof(DelegateMonitor.CreateString),
true,
typeof(Func <,>),
successType,
typeof(string));
var parameters = new object?[] { createStringDelegate, null };
var isSuccessful = tryMapMethod.Invoke(result, parameters);
if (isSuccessful == null)
{
throw new InvalidOperationException("TryMap should only return true or false");
}
Assert.IsFalse((bool)isSuccessful);
var mapResult = parameters[1];
Assert.IsNull(mapResult);
Assert.AreEqual(0, delegateMonitor.TotalCalls);
}
}
}
}
public void OnlyFuncForTheSameIndexedParameterTypeIsCalledOnMap()
{
foreach (var(voidResult, isSuccess, value, valueType) in AllVoidResultsToTest())
{
var voidResultType = voidResult.GetType();
var delegateMonitor = new DelegateMonitor();
var failureCreateStringDelegates = GetFailureTypes(voidResultType)
.Select(genericType =>
DelegateCreator.CreateDelegate(
delegateMonitor,
nameof(DelegateMonitor.CreateString),
true,
typeof(Func <,>),
genericType,
typeof(string)));
var successCreateStringDelegate = DelegateCreator.CreateDelegate(
delegateMonitor,
nameof(DelegateMonitor.CreateString),
false,
typeof(Func <>),
typeof(string));
var createStringDelegates = failureCreateStringDelegates
.Prepend(successCreateStringDelegate)
.Cast <object>()
.ToArray();
var genericMapMethod = voidResultType.GetMethods().Single(method => method.Name == "Map" && method.IsGenericMethod);
if (genericMapMethod == null)
{
throw new InvalidOperationException("Map method not found");
}
var mapMethod = genericMapMethod.MakeGenericMethod(typeof(string));
var mapResult = mapMethod.Invoke(voidResult, createStringDelegates);
Assert.AreEqual(isSuccess ? "void" : value?.ToString(), mapResult);
Assert.AreEqual(1, delegateMonitor.TotalCalls);
Assert.AreEqual(1, isSuccess ? delegateMonitor.GetCalls() : delegateMonitor.GetCalls(valueType !));
}
}
public void OnlyFuncForTheSameIndexedParameterTypeIsCalledOnMap()
{
foreach (var(union, value, valueType) in AllUnionsToTest())
{
var unionType = union.GetType();
var delegateMonitor = new DelegateMonitor();
var createStringDelegates = GetAllTypes(unionType)
.Select(genericType => DelegateCreator.CreateDelegate(
delegateMonitor,
nameof(DelegateMonitor.CreateString),
true,
typeof(Func <,>),
genericType,
typeof(string)))
.Cast <object>()
.ToArray();
var genericMapMethod = unionType.GetMethods().Single(method => method.Name == "Map" && method.IsGenericMethod);
if (genericMapMethod == null)
{
throw new InvalidOperationException("Map method not found");
}
var mapMethod = genericMapMethod.MakeGenericMethod(typeof(string));
var mapResult = mapMethod.Invoke(union, createStringDelegates);
Assert.AreEqual(value?.ToString(), mapResult);
Assert.AreEqual(1, delegateMonitor.TotalCalls);
Assert.AreEqual(1, delegateMonitor.GetCalls(valueType));
}
}