/// <summary>
/// Gets the fake object an expression is called on.
/// </summary>
/// <param name="fakeObjectCall">The call expression.</param>
/// <returns>A FakeObject.</returns>
/// <exception cref="ArgumentNullException">The fakeObjectCall is null.</exception>
/// <exception cref="ArgumentException">The specified expression is not an expression where a call is made to a faked object.</exception>
public FakeObject GetFakeObjectCallIsMadeOn(LambdaExpression fakeObjectCall)
{
Guard.IsNotNull(fakeObjectCall, "fakeObjectCall");
Expression callTargetExpression = null;
var methodExpression = fakeObjectCall.Body as MethodCallExpression;
if (methodExpression != null)
{
callTargetExpression = methodExpression.Object;
}
else
{
var propertyExpression = fakeObjectCall.Body as MemberExpression;
callTargetExpression = propertyExpression.Expression;
}
if (callTargetExpression == null)
{
throw new ArgumentException("The specified call is not made on a fake object.");
}
return(Fake.GetFakeObject(ExpressionManager.GetValueProducedByExpression(callTargetExpression)));
}
private static object[] GetArgumentsForConstructor(MethodCallExpression methodExpression)
{
return
((from argumentAndType in methodExpression.Arguments.Pairwise(methodExpression.Method.GetParameters())
select new { Value = ExpressionManager.GetValueProducedByExpression(argumentAndType.First), Type = argumentAndType.Second.ParameterType })
.SkipWhile(x => x.Type.Equals(typeof(IExtensibleIs)))
.Select(x => x.Value)
.ToArray());
}
/// <summary>
/// Gets an argument validator for the argument represented by the expression.
/// </summary>
/// <param name="argument">The argument.</param>
/// <returns>An IArgumentValidator used to validated arguments in IFakeObjectCalls.</returns>
public virtual IArgumentValidator GetArgumentValidator(Expression argument)
{
IArgumentValidator result = null;
if (!TryGetArgumentValidator(argument, out result))
{
result = new EqualityArgumentValidator(ExpressionManager.GetValueProducedByExpression(argument));
}
return(result);
}
private static bool TryGetAbstractValidator(Expression argument, out IArgumentValidator result)
{
var unary = argument as UnaryExpression;
if (unary != null && IsArgumentValidatorConversionMethod(unary.Method))
{
result = ExpressionManager.GetValueProducedByExpression(unary.Operand) as IArgumentValidator;
return(true);
}
var member = argument as MemberExpression;
if (member != null && IsArgumentValidatorArgumentProperty(member))
{
result = ExpressionManager.GetValueProducedByExpression(member.Expression) as IArgumentValidator;
return(true);
}
result = ExpressionManager.GetValueProducedByExpression(argument) as IArgumentValidator;
return(result != null);
}