private JArray GetEvidence <T>(IConditionExpression condition, T instance)
{
var leafEvaluators = new List <LeafExpression>();
condition.PopulateLeafFieldEvaluators(leafEvaluators);
var array = new JArray();
foreach (var leafExpr in leafEvaluators)
{
var ctxParameter = Expression.Parameter(typeof(T), "ctx");
var leftExpression = ctxParameter.EvaluateExpression(leafExpr.Left);
var lambda = Expression.Lambda(leftExpression, ctxParameter);
var getValue = lambda.Compile();
var actualObj = getValue.DynamicInvoke(instance);
string expected = leafExpr.Right;
if (leafExpr.RightSideIsExpression)
{
var rightExpression = ctxParameter.EvaluateExpression(leafExpr.Right);
lambda = Expression.Lambda(rightExpression, ctxParameter);
getValue = lambda.Compile();
var expectedObj = getValue.DynamicInvoke(instance);
expected = JsonConvert.SerializeObject(expectedObj);
}
var evidence = new
{
left = leafExpr.Left,
op = leafExpr.Operator.ToString(),
actual = actualObj,
expected
};
array.Add(JToken.FromObject(evidence));
}
return(array);
}
