v2 v3   Error

xUnit2016

"Keep precision in the allowed range when asserting equality of doubles or decimals."

Cause

Asserting on equality of two double or decimal values was declared with precision out of the acceptable range.

Reason for rule

Assert.Equals uses System.Math.Round internally which imposes limits on the precision parameter of [0..15] for doubles and [0..28] for decimals.

How to fix violations

Keep the precision in [0..15] for doubles and [0..28] for decimals.

Examples

Violates

using Xunit;

public class xUnit2016
{
    [Fact]
    public void TestMethod()
    {
        var actual = 1.1;

        Assert.Equal(1.1, actual, 16);
    }
}

Does not violate

using Xunit;

public class xUnit2016
{
    [Fact]
    public void TestMethod()
    {
        var actual = 1.1;

        Assert.Equal(1.1, actual, 15);
    }
}