private ExpressionSyntax ReplaceWithMessage(ExpressionSyntax expression, string whichOrAnd, string renameMethod, string prefix = "", string postfix = "")
{
var replacements = new[]
{
NodeReplacement.Remove(whichOrAnd),
NodeReplacement.Remove("Message"),
NodeReplacement.RemoveOccurrence("Should", occurrence: 2)
};
var newExpression = GetNewExpression(expression, replacements);
var rename = NodeReplacement.RenameAndExtractArguments(renameMethod, "WithMessage");
newExpression = GetNewExpression(newExpression, rename);
ArgumentSyntax newArgument = null;
switch (rename.Arguments[0].Expression)
{
case IdentifierNameSyntax identifier:
newArgument = SF.Argument(SF.ParseExpression($"$\"{prefix}{{{identifier.Identifier.Text}}}{postfix}\""));
break;
case LiteralExpressionSyntax literal:
newArgument = SF.Argument(SF.ParseExpression($"\"{prefix}{literal.Token.ValueText}{postfix}\""));
break;
}
var replacement = NodeReplacement.WithArguments("WithMessage", rename.Arguments.Replace(rename.Arguments[0], newArgument));
return(GetNewExpression(newExpression, replacement));
}
public static void NoArgumentNull()
{
StatementSyntax ToStatement(IParameterSymbol parameter)
{
return(F.IfStatement(
F.ParseExpression($"{nameof(ReferenceEquals)}(null, {parameter.Name})"),
F.ParseStatement($"throw new {typeof(ArgumentNullException).FullName}(\"{parameter.Name}\");")
));
}
CallBinder.StatementSyntax = F.Block(
from parameter in CallBinder.CallerSymbol.Parameters
where !parameter.Type.IsValueType
select ToStatement(parameter)
);
}
private SyntaxNode codeExtension(SyntaxNode node, SyntacticalExtension <SyntaxNode> extension)
{
if (extension.Kind == ExtensionKind.Code)
{
var codeBlock = extension.Body as BlockSyntax;
Assert.IsNotNull(extension.Body);
return(codeBlock.AddStatements(
new[] {
CSharp.ParseStatement("var myFoo = 5;"),
CSharp.ParseStatement("bar(myFoo);")
}));
}
Assert.AreEqual(extension.Kind, ExtensionKind.Expression);
return(CSharp.ParseExpression("bar(7)"));
}
public static BlockSyntax GetInvocationBlockSyntax(string delegateTypeName, string methodName, string parameters,
IEnumerable <IParameterSymbol> outParameters, ITypeSymbol returnType, SemanticModel semanticModel)
{
var voidType = semanticModel.Compilation.GetTypeByMetadataName("System.Void");
bool returnsVoid = returnType.Equals(voidType);
var statements = new List <StatementSyntax>();
string returnStatement = returnsVoid ? string.Empty : "return ";
statements.Add(SF.ParseStatement($"{delegateTypeName} del;{System.Environment.NewLine}"));
// Prepare if/else block to determine how uninitialized stubs are handled.
var ifStrictExpression = SF.ParseExpression("MockBehavior == MockBehavior.Strict");
var ifStrictTrueSyntax = SF.Block(SF.ParseStatement($"del = _stubs.GetMethodStub<{delegateTypeName}>(\"{methodName}\");{System.Environment.NewLine}"));
var defaultReturnInvocation = outParameters.Select(p =>
SF.ParseStatement($"{p.Name} = default ({p.Type.GetGenericName()});")).ToList();
if (!returnsVoid)
{
defaultReturnInvocation.Add(SF.ParseStatement(GetDefaultReturnInvocationStatement(returnType, semanticModel)));
}
else
{
defaultReturnInvocation.Add(SF.ParseStatement($"return;{System.Environment.NewLine}"));
}
var ifTryGetMethodStubExpression = SF.ParseExpression($"!_stubs.TryGetMethodStub<{delegateTypeName}>(\"{methodName}\", out del)");
var ifStrictFalseSyntax = SF.Block(SF.IfStatement(ifTryGetMethodStubExpression, SF.Block(defaultReturnInvocation)));
statements.Add(SF.IfStatement(ifStrictExpression, ifStrictTrueSyntax, SF.ElseClause(ifStrictFalseSyntax)));
// Add default invocation.
statements.Add(SF.ParseStatement($"{returnStatement}del.Invoke({parameters});{System.Environment.NewLine}"));
return(SF.Block(statements.ToArray()));
}