/// <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_HasValueIsFalse()
{
// {"HasValue": true} is false
var hasValueOperator = new HasValueOperator(true, isNegative: false);
Assert.IsFalse(hasValueOperator.EvaluateExpression(null));
// {"HasValue": false} is true
hasValueOperator = new HasValueOperator(false, isNegative: false);
Assert.IsTrue(hasValueOperator.EvaluateExpression(null));
}
public void EvaluateExpression_PropertyHasNullOrEmptyValue_HasValueIsFalse(object jTokenValue)
{
var jToken = ToJToken(jTokenValue);
// {"HasValue": true} is false
var hasValueOperator = new HasValueOperator(true, isNegative: false);
Assert.IsFalse(hasValueOperator.EvaluateExpression(jToken));
// {"HasValue": false} is true
hasValueOperator = new HasValueOperator(false, isNegative: false);
Assert.IsTrue(hasValueOperator.EvaluateExpression(jToken));
}
public void EvaluateExpression_PropertyIsObject_HasValueIsTrue()
{
var jToken = ToJToken(new { });
// {"HasValue": true} is true
var hasValueOperator = new HasValueOperator(true, isNegative: false);
Assert.IsTrue(hasValueOperator.EvaluateExpression(jToken));
// {"HasValue": false} is false
hasValueOperator = new HasValueOperator(false, isNegative: false);
Assert.IsFalse(hasValueOperator.EvaluateExpression(jToken));
}
private static void HasValueValidation(HasValueOperator hasValueOperator, bool operatorValue)
{
Assert.AreEqual(operatorValue, hasValueOperator.EffectiveValue);
Assert.IsFalse(hasValueOperator.IsNegative);
}