DefaultFloatingPointTolerance

DefaultFloatingPointToleranceAttribute sets the default tolerance for floating-point equality comparisons (float and double) unless a comparison explicitly specifies a tolerance.

You can apply it at method, fixture, or assembly scope.

Constructor

DefaultFloatingPointToleranceAttribute(double tolerance)

Parameter	Type	Description
`tolerance`	`double`	The default tolerance used for floating-point comparisons when no explicit tolerance is specified.

Applies To

Test Methods	Test Fixtures (Classes)	Assembly
✅	✅	✅

Note

When applied at fixture or assembly level, this default tolerance applies to all contained tests unless overridden by a more specific scope or by an explicit tolerance in an assertion.

Examples

Fixture Default Tolerance

[TestFixture]
[DefaultFloatingPointTolerance(1)]
public class ToleranceFixtureTests
{
    [Test]
    public void ComparisonUsingFixtureDefaultTolerance()
    {
        Assert.That(1f, Is.EqualTo(2));
    }

    [Test]
    public void ExplicitToleranceOverridesDefault()
    {
        Assert.That(1f, Is.EqualTo(1.2f).Within(0.3));
    }
}

Method Override

[TestFixture]
[DefaultFloatingPointTolerance(1)]
public class ToleranceMethodOverrideTests
{
    [Test]
    [DefaultFloatingPointTolerance(2)]
    public void MethodToleranceOverridesFixtureTolerance()
    {
        Assert.That(2f, Is.EqualTo(4));
    }
}

Notes

This attribute affects default tolerance for floating-point equality comparisons only.
Integer comparisons are not affected.
An explicit tolerance in an assertion (for example, .Within(...)) overrides the default tolerance.