/// <summary>
/// Modifies the constraint to use an IComparer<T> and returns self.
/// </summary>
public RangeConstraint Using <T>(IComparer <T> comparer)
{
this.comparer = ComparisonAdapter.For(comparer);
return(this);
}
/// <summary>
/// Modifies the constraint to use an IComparer and returns self
/// </summary>
public ComparisonConstraint Using(IComparer comparer)
{
this.comparer = ComparisonAdapter.For(comparer);
return(this);
}
/// <summary>
/// Perform the comparison
/// </summary>
protected override bool PerformComparison(ComparisonAdapter comparer, object actual, object expected, Tolerance tolerance)
{
return(comparer.Compare(actual, tolerance.ApplyToValue(expected).LowerBound) > 0);
}
/// <summary>
/// Modifies the constraint to use a Comparison<T> and returns self.
/// </summary>
public CollectionOrderedConstraint Using <T>(Comparison <T> comparer)
{
this.comparer = ComparisonAdapter.For(comparer);
this.comparerName = comparer.GetType().FullName;
return(this);
}
/// <summary> /// Protected function overridden by derived class to actually perform the comparison /// </summary> protected abstract bool PerformComparison(ComparisonAdapter comparer, object actual, object expected, Tolerance tolerance);
/// <summary>
/// Modifies the constraint to use a <see cref="Comparison{T}"/> and returns self
/// </summary>
/// <param name="comparer">The comparer used for comparison tests</param>
/// <returns>A constraint modified to use the given comparer</returns>
public ComparisonConstraint Using <T>(Comparison <T> comparer)
{
this._comparer = ComparisonAdapter.For(comparer);
return(this);
}
public static void CanCompareWithNull(ComparisonAdapter adapter)
{
Assert.That(adapter.Compare(null, "a"), Is.LessThan(0));
Assert.That(adapter.Compare("a", null), Is.GreaterThan(0));
Assert.That(adapter.Compare(null, null), Is.Zero);
}
/// <summary>
/// Returns an EqualityAdapter that wraps a Comparison<T>.
/// </summary>
public static EqualityAdapter For <T>(Comparison <T> comparer)
{
return(new ComparisonAdapterAdapter(ComparisonAdapter.For(comparer)));
}
public ComparisonAdapterAdapter(ComparisonAdapter comparer)
{
this.comparer = comparer;
}