//Action<int> wrappedFunction -- this arg has been removed because I haven't figured out the generics to inline the assertions being tested
internal static TypeValuePair GetUnionResult(this object item, UnionMethodInfo unionMethodData)
{
if (unionMethodData.IsSwitch)
{
TypeValuePair closureResult = null;
void GetSwitch <TValue>(TValue value)
=> closureResult = new TypeValuePair(typeof(TValue), value);
void GetSwitchOptional()
=> throw new Exception("Optional parameter cannot resolve a value");
var switchMainArgs = unionMethodData.CaseTypes.Select(x => MethodUtils.MakeAction(GetSwitch, x));
var switchFinalArgs = switchMainArgs.Concat(
unionMethodData.OptionalLast
? new[] { MethodUtils.MakeAction(GetSwitchOptional) }
: new object[0])
.ToArray();
unionMethodData.Method.Invoke(item, switchFinalArgs);
return(closureResult);
}
TypeValuePair GetMatch <TValue>(TValue value)
=> new TypeValuePair(typeof(TValue), value);
TypeValuePair GetMatchOptional()
=> new TypeValuePair(typeof(None), None.Value);
var mainArgs = unionMethodData.CaseTypes.Select(x => MethodUtils.MakeMatchArg(GetMatch, x));
var finalArgs = mainArgs.Concat(
unionMethodData.OptionalLast
? new[] { MethodUtils.MakeFunc(GetMatchOptional) }
: new object[0])
.ToArray();
return((TypeValuePair)unionMethodData.Method
.MakeGenericMethod(typeof(TypeValuePair))
.Invoke(item, finalArgs));
}
internal static TResult CheckItemHelper <TResult>(AssertionScope scope, TypeValuePair typeValuePair,
UnionMethodInfo methodInfo)
{
var itemType = typeValuePair.Type;
var expectedType = typeof(TResult);
var expectedTypePretty = expectedType.PrettyPrint();
var givenTypes = methodInfo.OptionalLast
? methodInfo.CaseTypes.Concat(new[] { typeof(None) }).ToArray()
: methodInfo.CaseTypes;
var givenTypesPretty = string.Join(", ", givenTypes.Select(ReflectionUtils.PrettyPrint));
scope
.ForCondition(givenTypes.Contains(expectedType))
.FailWith("Value should be one of {0} but found {1} instead.",
givenTypesPretty, expectedTypePretty);
scope
.ForCondition(expectedType.IsAssignableFrom(itemType))
.FailWith("Value should be assignable to {0} but found {1} instead",
expectedTypePretty, itemType.PrettyPrint());
return((TResult)typeValuePair.Value);
}