/// <summary>
/// Validates and Tries to extract the information function from the function
/// </summary>
public static bool TryExtractFunction(Logger logger, ISourceFile sourceFile, IFunctionDeclaration possibleFunction, IDictionary <string, string> lkgFiles, out TestFunction testFunction)
{
testFunction = null;
var location = possibleFunction.GetLineInfo(sourceFile).ToLineAndColumn();
var shortName = possibleFunction.Name.Text;
var fullName = shortName;
INode current = possibleFunction.Parent;
while (current != null)
{
switch (current.Kind)
{
case SyntaxKind.SourceFile:
case SyntaxKind.ModuleBlock:
current = current.Parent;
break;
case SyntaxKind.ModuleDeclaration:
var moduleDecl = (IModuleDeclaration)current;
fullName = moduleDecl.Name.Text + "." + fullName;
current = current.Parent;
break;
default:
logger.LogError(sourceFile, possibleFunction, "Only top-level functions are allowed to be declared as UnitTests.");
return(false);
}
}
if (!possibleFunction.Flags.HasFlag(NodeFlags.Export))
{
logger.LogError(sourceFile, possibleFunction, C($"UnitTest function '{fullName}' must be exported"));
return(false);
}
if (possibleFunction.Type != null && possibleFunction.Type.Kind != SyntaxKind.VoidKeyword)
{
logger.LogError(sourceFile, possibleFunction, C($"UnitTest function '{fullName}' cannot return a value. It must be a 'void' function"));
return(false);
}
if (possibleFunction.Parameters.Count > 0)
{
logger.LogError(sourceFile, possibleFunction, C($"UnitTest function '{fullName}' cannot have any parameters"));
return(false);
}
if (possibleFunction.TypeParameters != null && possibleFunction.TypeParameters.Count > 0)
{
logger.LogError(sourceFile, possibleFunction, C($"UnitTest function '{fullName}' cannot be generic"));
return(false);
}
if (possibleFunction.Body == null)
{
logger.LogError(sourceFile, possibleFunction, C($"UnitTest function '{fullName}' must declare a function body"));
return(false);
}
string lkgFilePath = null;
var lkgKey = Args.ComputeLkgKey(sourceFile.FileName, shortName);
lkgFiles.TryGetValue(lkgKey, out lkgFilePath);
// Remove it to mark it is already processed
lkgFiles.Remove(lkgKey);
testFunction = new TestFunction(shortName, fullName, location, lkgFilePath);
return(true);
}
