Class ThrowsConstraint

ThrowsConstraint is used to test the exception thrown by a delegate by applying a constraint to it.

Inheritance
object
Constraint
PrefixConstraint
ThrowsConstraint
Implements
Inherited Members
Namespace: NUnit.Framework.Constraints
Assembly: nunit.framework.dll
Syntax
public class ThrowsConstraint : PrefixConstraint, IConstraint, IResolveConstraint

Constructors

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ThrowsConstraint(IConstraint)

Initializes a new instance of the ThrowsConstraint class, using a constraint to be applied to the exception.

Declaration
public ThrowsConstraint(IConstraint baseConstraint)
Parameters
Type Name Description
IConstraint baseConstraint

A constraint to apply to the caught exception.

Properties

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ActualException

Get the actual exception thrown - used by Assert.Throws.

Declaration
public Exception? ActualException { get; }
Property Value
Type Description
Exception
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Description

Gets text describing a constraint

Declaration
public override string Description { get; }
Property Value
Type Description
string
Overrides

Methods

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ApplyTo<TActual>(ActualValueDelegate<TActual>)

Converts an ActualValueDelegate to a TestDelegate before calling the primary overload.

Declaration
public override ConstraintResult ApplyTo<TActual>(ActualValueDelegate<TActual> del)
Parameters
Type Name Description
ActualValueDelegate<TActual> del
Returns
Type Description
ConstraintResult
Type Parameters
Name Description
TActual
Overrides
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ApplyTo<TActual>(TActual)

Executes the code of the delegate and captures any exception. If a non-null base constraint was provided, it applies that constraint to the exception.

Declaration
public override ConstraintResult ApplyTo<TActual>(TActual actual)
Parameters
Type Name Description
TActual actual

A delegate representing the code to be tested
Returns
Type Description
ConstraintResult

True if an exception is thrown and the constraint succeeds, otherwise false
Type Parameters
Name Description
TActual
Overrides

Implements