<PackageReference Include="NUnit" Version="4.2.1" />

TrueConstraint

public class TrueConstraint : Constraint
TrueConstraint tests that the actual value is true
using System; using System.Runtime.CompilerServices; namespace NUnit.Framework.Constraints { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(0)] public class TrueConstraint : Constraint { public override string Description => "True"; public override ConstraintResult ApplyTo<[System.Runtime.CompilerServices.Nullable(2)] TActual>(TActual actual) { return new ConstraintResult(this, actual, true.Equals((object)actual)); } public TrueConstraint() : base(Array.Empty<object>()) { } } }