public static ParsedCallExpression BuildSetterFromGetter <TValue>(
ParsedCallExpression parsedCallExpression)
{
var propertyName = GetPropertyName(parsedCallExpression);
if (propertyName is null)
{
var expressionDescription = GetExpressionDescription(parsedCallExpression);
throw new ArgumentException("Expression '" + expressionDescription +
"' must refer to a property or indexer getter, but doesn't.");
}
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("Expression '" + expressionDescription +
"' refers to an indexed property that does not have a setter.");
}
throw new ArgumentException($"The property {propertyName} does not have a setter.");
}
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));
}
private ParsedCallExpression CreateSetterExpressionWithNewValue(Expression <Func <TValue> > valueExpression)
{
var originalParameterInfos = this.parsedSetterExpression.CalledMethod.GetParameters();
var parsedValueExpression = new ParsedArgumentExpression(
valueExpression.Body,
originalParameterInfos.Last());
var arguments = this.parsedSetterExpression.ArgumentsExpressions
.Take(originalParameterInfos.Length - 1)
.Concat(new[] { parsedValueExpression });
return(new ParsedCallExpression(
this.parsedSetterExpression.CalledMethod,
this.parsedSetterExpression.CallTarget,
arguments));
}
private ParsedCallExpression CreateSetterExpressionWithNewValue(Expression <Func <TValue> > valueExpression)
{
var originalParameterInfos = this.parsedSetterExpression.CalledMethod.GetParameters();
var parsedValueExpression = new ParsedArgumentExpression(
valueExpression.Body,
originalParameterInfos.Last());
var arguments = new ParsedArgumentExpression[originalParameterInfos.Length];
Array.Copy(this.parsedSetterExpression.ArgumentsExpressions, arguments, originalParameterInfos.Length - 1);
arguments[originalParameterInfos.Length - 1] = parsedValueExpression;
return(new ParsedCallExpression(
this.parsedSetterExpression.CalledMethod,
this.parsedSetterExpression.CallTarget,
arguments));
}
private static ParsedCallExpression BuildSetterFromGetter <TValue>(
ParsedCallExpression parsedCallExpression)
{
var propertyName = GetPropertyName(parsedCallExpression);
if (propertyName == null)
{
var expressionDescription = GetExpressionDescription(parsedCallExpression);
throw new ArgumentException("Expression '" + expressionDescription +
"' must refer to a property or indexer getter, but doesn't.");
}
var parsedArgumentExpressions = parsedCallExpression.ArgumentsExpressions ?? new ParsedArgumentExpression[0];
var parameterTypes = parsedArgumentExpressions
.Select(p => p.ArgumentInformation.ParameterType)
.Concat(new[] { parsedCallExpression.CalledMethod.ReturnType })
.ToArray();
var indexerSetterInfo = parsedCallExpression.CallTarget.GetType()
.GetMethod("set_" + propertyName, parameterTypes);
if (indexerSetterInfo == null)
{
if (parsedArgumentExpressions.Any())
{
var expressionDescription = GetExpressionDescription(parsedCallExpression);
throw new ArgumentException("Expression '" + expressionDescription +
"' refers to an indexed property that does not have a setter.");
}
throw new ArgumentException(
"The property '" + propertyName + "' does not have a setter.");
}
var originalParameterInfos = indexerSetterInfo.GetParameters();
var newParsedSetterValueExpression = new ParsedArgumentExpression(
BuildArgumentThatMatchesAnything <TValue>(),
originalParameterInfos.Last());
var arguments = parsedArgumentExpressions
.Take(originalParameterInfos.Length - 1)
.Concat(new[] { newParsedSetterValueExpression });
return(new ParsedCallExpression(indexerSetterInfo, parsedCallExpression.CallTarget, arguments));
}
