Define a tolerance value (aka an ‘epsilon’ or ‘delta’), for instance, 0.00001, and then use to compare the difference like so:
if (Math.Abs(a - b) < delta)
{
// Values are within specified tolerance of each other....
}
You could use Double.Epsilon
but you would have to use a multiplying factor.
Better still, write an extension method to do the same. We have something like Assert.AreSimiliar(a,b)
in our unit tests.
Microsoft’s Assert.AreEqual()
method has an overload that takes a delta: public static void AreEqual(double expected, double actual, double delta)
NUnit also provides an overload to their Assert.AreEqual()
method that allows for a delta to be provided.