public InvocationShape(LambdaExpression expression, MethodInfo method, IReadOnlyList <Expression> arguments = null, bool exactGenericTypeArguments = false, bool skipMatcherInitialization = false, bool allowNonOverridable = false)
{
Debug.Assert(expression != null);
Debug.Assert(method != null);
if (!allowNonOverridable) // the sole currently known legitimate case where this evaluates to `false` is when setting non-overridable properties via LINQ to Mocks
{
Guard.IsOverridable(method, expression);
Guard.IsVisibleToProxyFactory(method);
}
this.Expression = expression;
this.Method = method;
if (arguments != null && !skipMatcherInitialization)
{
(this.argumentMatchers, this.Arguments) = MatcherFactory.CreateMatchers(arguments, method.GetParameters());
}
else
{
this.argumentMatchers = noArgumentMatchers;
this.Arguments = arguments ?? noArguments;
}
this.exactGenericTypeArguments = exactGenericTypeArguments;
}
public static IMatcher CreateMatcher(Expression argument, ParameterInfo parameter)
{
if (parameter.ParameterType.IsByRef)
{
if ((parameter.Attributes & (ParameterAttributes.In | ParameterAttributes.Out)) == ParameterAttributes.Out)
{
// `out` parameter
return(AnyMatcher.Instance);
}
else
{
// `ref` parameter
// Test for special case: `It.Ref<TValue>.IsAny`
if (argument is MemberExpression memberExpression)
{
var member = memberExpression.Member;
if (member.Name == nameof(It.Ref <object> .IsAny))
{
var memberDeclaringType = member.DeclaringType;
if (memberDeclaringType.IsGenericType)
{
var memberDeclaringTypeDefinition = memberDeclaringType.GetGenericTypeDefinition();
if (memberDeclaringTypeDefinition == typeof(It.Ref <>))
{
return(AnyMatcher.Instance);
}
}
}
}
var constant = argument.PartialEval() as ConstantExpression;
if (constant == null)
{
throw new NotSupportedException(Resources.RefExpressionMustBeConstantValue);
}
return(new RefMatcher(constant.Value));
}
}
else if (parameter.IsDefined(typeof(ParamArrayAttribute), true) && (argument.NodeType == ExpressionType.NewArrayInit || !argument.Type.IsArray))
{
return(new ParamArrayMatcher((NewArrayExpression)argument));
}
else
{
return(MatcherFactory.CreateMatcher(argument));
}
}
private static IMatcher[] GetArgumentMatchers(IReadOnlyList <Expression> arguments, ParameterInfo[] parameters)
{
Debug.Assert(arguments != null);
Debug.Assert(parameters != null);
Debug.Assert(arguments.Count == parameters.Length);
var n = parameters.Length;
var argumentMatchers = new IMatcher[n];
for (int i = 0; i < n; ++i)
{
argumentMatchers[i] = MatcherFactory.CreateMatcher(arguments[i], parameters[i]);
}
return(argumentMatchers);
}
public InvocationShape(LambdaExpression expression, MethodInfo method, IReadOnlyList <Expression> arguments = null)
{
Debug.Assert(expression != null);
Debug.Assert(method != null);
Guard.IsOverridable(method, expression);
Guard.IsVisibleToProxyFactory(method);
this.Expression = expression;
this.Method = method;
this.Arguments = arguments ?? noArguments;
this.argumentMatchers = arguments != null?MatcherFactory.CreateMatchers(arguments, method.GetParameters())
: noArgumentMatchers;
}
public static Pair <IMatcher[], Expression[]> CreateMatchers(IReadOnlyList <Expression> arguments, ParameterInfo[] parameters)
{
Debug.Assert(arguments != null);
Debug.Assert(parameters != null);
Debug.Assert(arguments.Count == parameters.Length);
var n = parameters.Length;
var evaluatedArguments = new Expression[n];
var argumentMatchers = new IMatcher[n];
for (int i = 0; i < n; ++i)
{
(argumentMatchers[i], evaluatedArguments[i]) = MatcherFactory.CreateMatcher(arguments[i], parameters[i]);
}
return(new Pair <IMatcher[], Expression[]>(argumentMatchers, evaluatedArguments));
}
public InvocationShape(LambdaExpression expression, MethodInfo method, IReadOnlyList <Expression> arguments = null, bool exactGenericTypeArguments = false)
{
Debug.Assert(expression != null);
Debug.Assert(method != null);
Guard.IsOverridable(method, expression);
Guard.IsVisibleToProxyFactory(method);
this.Expression = expression;
this.Method = method;
if (arguments != null)
{
(this.argumentMatchers, this.Arguments) = MatcherFactory.CreateMatchers(arguments, method.GetParameters());
}
else
{
this.argumentMatchers = noArgumentMatchers;
this.Arguments = noArguments;
}
this.exactGenericTypeArguments = exactGenericTypeArguments;
}
public static Pair <IMatcher, Expression> CreateMatcher(Expression argument, ParameterInfo parameter)
{
if (parameter.ParameterType.IsByRef)
{
if ((parameter.Attributes & (ParameterAttributes.In | ParameterAttributes.Out)) == ParameterAttributes.Out)
{
// `out` parameter
return(new Pair <IMatcher, Expression>(AnyMatcher.Instance, argument));
}
else
{
// `ref` parameter
// Test for special case: `It.Ref<TValue>.IsAny`
if (argument is MemberExpression memberExpression)
{
var member = memberExpression.Member;
if (member.Name == nameof(It.Ref <object> .IsAny))
{
var memberDeclaringType = member.DeclaringType;
if (memberDeclaringType.IsGenericType)
{
var memberDeclaringTypeDefinition = memberDeclaringType.GetGenericTypeDefinition();
if (memberDeclaringTypeDefinition == typeof(It.Ref <>))
{
return(new Pair <IMatcher, Expression>(AnyMatcher.Instance, argument));
}
}
}
}
if (argument.PartialEval() is ConstantExpression constant)
{
return(new Pair <IMatcher, Expression>(new RefMatcher(constant.Value), constant));
}
throw new NotSupportedException(Resources.RefExpressionMustBeConstantValue);
}
}
else if (parameter.IsDefined(typeof(ParamArrayAttribute), true) && argument.NodeType == ExpressionType.NewArrayInit)
{
var newArrayExpression = (NewArrayExpression)argument;
Debug.Assert(newArrayExpression.Type.IsArray);
var elementType = newArrayExpression.Type.GetElementType();
var n = newArrayExpression.Expressions.Count;
var matchers = new IMatcher[n];
var initializers = new Expression[n];
for (int i = 0; i < n; ++i)
{
(matchers[i], initializers[i]) = MatcherFactory.CreateMatcher(newArrayExpression.Expressions[i]);
initializers[i] = initializers[i].ConvertIfNeeded(elementType);
}
return(new Pair <IMatcher, Expression>(new ParamArrayMatcher(matchers), Expression.NewArrayInit(elementType, initializers)));
}
else if (argument.NodeType == ExpressionType.Convert)
{
var convertExpression = (UnaryExpression)argument;
if (convertExpression.Method?.Name == "op_Implicit")
{
if (!parameter.ParameterType.IsAssignableFrom(convertExpression.Operand.Type) && convertExpression.Operand.IsMatch(out _))
{
throw new ArgumentException(
string.Format(
Resources.ArgumentMatcherWillNeverMatch,
convertExpression.Operand.ToStringFixed(),
convertExpression.Operand.Type.GetFormattedName(),
parameter.ParameterType.GetFormattedName()));
}
}
}
return(MatcherFactory.CreateMatcher(argument));
}
