And Constraint

AndConstraint combines two other constraints and succeeds only if they both succeed.

Constructor

AndConstraint(Constraint left, Constraint right)

Syntax

<Constraint>.And.<Constraint>

Examples of Use

[Test]
public void AndConstraint_Examples()
{
    Assert.That(2.3, Is.GreaterThan(2.0).And.LessThan(3.0));
    
    int? i = 10;
    Assert.That(i, Is.Not.Null.And.GreaterThan(9));
}

Evaluation Order and Precedence

Note that the constraint evaluates the sub-constraints left to right, meaning that Assert.That(i, Is.Not.Null.And.GreaterThan(9)); where i is a nullable int will work for 10, but fail for null with the message Expected: not null and greater than 9. But was: null. Assert.That(i, Is.GreaterThan(9).And.Not.Null); will also succeed for 10, but throw an exception for null, as null cannot be compared to 9.

The OrConstraint has precedence over the AndConstraint.

See also

• OrConstraint