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using System;
using NUnit.Framework;
using NUnit.Framework.Constraints;
using OpenSim.Tests.Common;
namespace OpenSim.Tests.Common
{
public class DoubleToleranceConstraint : ANumericalToleranceConstraint
{
private double _baseValue;
private double _valueToBeTested;
public DoubleToleranceConstraint(double baseValue, double tolerance) : base(tolerance)
{
_baseValue = baseValue;
}
///<summary>
///Test whether the constraint is satisfied by a given value
///</summary>
///<param name="valueToBeTested">The value to be tested</param>
///<returns>
///True for success, false for failure
///</returns>
public override bool Matches(object valueToBeTested)
{
if (valueToBeTested == null)
{
throw new ArgumentException("Constraint cannot be used upon null values.");
}
if( valueToBeTested.GetType() != typeof(double))
{
throw new ArgumentException("Constraint cannot be used upon non double-values.");
}
_valueToBeTested = (double)valueToBeTested;
return IsWithinDoubleConstraint(_valueToBeTested, _baseValue );
}
public override void WriteDescriptionTo(MessageWriter writer)
{
writer.WriteExpectedValue(string.Format("A value {0} within tolerance of plus or minus {1}",_baseValue,_tolerance));
}
public override void WriteActualValueTo(MessageWriter writer)
{
writer.WriteActualValue(_valueToBeTested);
}
}
}
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