/// <summary>
/// Creates a <c>LeafExpression</c> capable of evaluating JSON using the operator specified in the JSON rule.
/// </summary>
/// <returns>The LeafExpression.</returns>
public override Expression ToExpression()
{
LeafExpressionOperator leafOperator = null;
if (this.Exists != null)
{
leafOperator = new ExistsOperator(Exists.Value, isNegative: false);
}
else if (this.HasValue != null)
{
leafOperator = new HasValueOperator(HasValue.Value, isNegative: false);
}
else if (this.Is != null || this.NotEquals != null)
{
leafOperator = new EqualsOperator(
specifiedValue: this.Is ?? this.NotEquals,
isNegative: this.NotEquals != null);
}
if (leafOperator != null)
{
return(new LeafExpression(this.ResourceType, this.Path, leafOperator));
}
throw new NotImplementedException();
}
public void EvaluateExpression_PropertyDoesNotExist_ExistsExpressionIsFalse()
{
// {"Exists": true} is false for null JToken
var existsOperator = new ExistsOperator(true, isNegative: false);
Assert.IsFalse(existsOperator.EvaluateExpression(null));
// {"Exists": false} is true for null JToken
existsOperator = new ExistsOperator(false, isNegative: false);
Assert.IsTrue(existsOperator.EvaluateExpression(null));
}
public void EvaluateExpression_PropertyIsObject_ExistsExpressionIsTrue()
{
var jToken = ToJToken(new { });
// {"Exists": true} is true
var existsOperator = new ExistsOperator(true, isNegative: false);
Assert.IsTrue(existsOperator.EvaluateExpression(jToken));
// {"Exists": false} is false
existsOperator = new ExistsOperator(false, isNegative: false);
Assert.IsFalse(existsOperator.EvaluateExpression(jToken));
}
private static void ExistsValidation(ExistsOperator existsOperator, bool operatorValue)
{
Assert.AreEqual(operatorValue, existsOperator.EffectiveValue);
Assert.IsFalse(existsOperator.IsNegative);
}
