modify test to test also simple fields.

+ Fields Management in context

Author: Sébastien Geiser

CodingSeb.ExpressionEvaluator.Tests/ExpressionEvaluatorTests.cs

@@ -1762,12 +1762,12 @@ void Evaluator_PreEvaluateVariable(object sender, VariablePreEvaluationEventArg
 
                 evaluatorWithPersonContext.Context = new Person1()
                 {
-                    Name = "John",
+                    name = "John",
                     LastName = "Smith"
                 };
 
                 yield return new TestCaseData(evaluatorWithPersonContext
-                    , "Name + \" \" + LastName"
+                    , "name + \" \" + LastName"
                     , null)
                     .Returns("John Smith")
                     .SetCategory("Context object");

CodingSeb.ExpressionEvaluator.Tests/TestsUtils/Person1.cs

@@ -2,8 +2,9 @@
 {
     public class Person1
     {
-        public string Name { get; set; }
+        public string name;
         public string LastName { get; set; }
+
         public int APersonMethod()
         {
             return 10;

CodingSeb.ExpressionEvaluator/ExpressionEvaluator.cs

@@ -1943,9 +1943,13 @@ protected virtual bool EvaluateVarOrFunc(string expression, Stack<object> stack,
                 }
                 else
                 {
-                    if (inObject || Context?.GetType()
+                    if (inObject
+                        || Context?.GetType()
                             .GetProperties()
-                            .Any(propInfo => propInfo.Name.Equals(varFuncName, StringComparisonForCasing)) == true)
+                            .Any(propInfo => propInfo.Name.Equals(varFuncName, StringComparisonForCasing)) == true
+                        || Context?.GetType()
+                            .GetFields()
+                            .Any(fieldInfo => fieldInfo.Name.Equals(varFuncName, StringComparisonForCasing)) == true)
                     {
                         if (inObject && (stack.Count == 0 || stack.Peek() is ExpressionOperator))
                             throw new ExpressionEvaluatorSyntaxErrorException($"[{varFuncMatch.Value}] must follow an object.");