/// <summary>
/// Builds a parsed call expression for a property setter from the matching getter. The property must be interceptable as a faked method.
/// </summary>
/// <typeparam name="TValue">The return type of the getter.</typeparam>
/// <param name="parsedCallExpression">
/// The parsed call expression describing the getter.
/// Must have a non-null <see cref="ParsedCallExpression.CallTarget"/>.
/// </param>
/// <returns>A parsed call expression describing the setter that matches the supplied getter.</returns>
public static ParsedCallExpression BuildSetterFromGetter <TValue>(ParsedCallExpression parsedCallExpression)
{
var propertyName = GetPropertyName(parsedCallExpression);
var parameterTypes = new Type[parsedCallExpression.ArgumentsExpressions.Length + 1];
for (int i = 0; i < parsedCallExpression.ArgumentsExpressions.Length; ++i)
{
parameterTypes[i] = parsedCallExpression.ArgumentsExpressions[i].ArgumentInformation.ParameterType;
}
parameterTypes[parsedCallExpression.ArgumentsExpressions.Length] = parsedCallExpression.CalledMethod.ReturnType;
// The DeclaringType may be null, so fall back to the faked object type.
// (It's unlikely to happen, though, and would require the client code to have passed a specially
// constructed expression to ACallToSet; perhaps a dynamically generated method created
// via lightweight code generation.)
var callTargetType = parsedCallExpression.CalledMethod.DeclaringType
?? Fake.GetFakeManager(parsedCallExpression.CallTarget !).FakeObjectType;
var setPropertyName = "set_" + propertyName;
var indexerSetterInfo = callTargetType.GetMethod(setPropertyName, parameterTypes);
if (indexerSetterInfo is null)
{
if (parsedCallExpression.ArgumentsExpressions.Any())
{
var expressionDescription = GetExpressionDescription(parsedCallExpression);
throw new ArgumentException(ExceptionMessages.ExpressionIsIndexedPropertyWithoutSetter(expressionDescription));
}
throw new ArgumentException(ExceptionMessages.PropertyHasNoSetter(propertyName));
}
var originalParameterInfos = indexerSetterInfo.GetParameters();
var newParsedSetterValueExpression = new ParsedArgumentExpression(
BuildArgumentThatMatchesAnything <TValue>(),
originalParameterInfos.Last());
var arguments = new ParsedArgumentExpression[originalParameterInfos.Length];
Array.Copy(parsedCallExpression.ArgumentsExpressions, arguments, originalParameterInfos.Length - 1);
arguments[originalParameterInfos.Length - 1] = newParsedSetterValueExpression;
return(new ParsedCallExpression(indexerSetterInfo, parsedCallExpression.CallTarget, arguments));
}
