Constraint Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
The Constraint class is the base of all built-in constraints within NUnit. It provides the operator overloads used to combine constraints.
public abstract class Constraint : NUnit.Framework.Constraints.IResolveConstrainttype Constraint = class
interface IResolveConstraint- Inheritance
-
Constraint
- Derived
- Implements
Constructors
| Constraint() |
Construct a constraint with no arguments |
| Constraint(Object) |
Construct a constraint with one argument |
| Constraint(Object, Object) |
Construct a constraint with two arguments |
Fields
| actual |
The actual value being tested against a constraint |
| UNSET |
Static UnsetObject used to detect derived constraints failing to set the actual value. |
Properties
| And |
Returns a ConstraintExpression by appending And to the current constraint. |
| DisplayName |
The display name of this Constraint for use by ToString(). The default value is the name of the constraint with trailing "Constraint" removed. Derived classes may set this to another name in their constructors. |
| Or |
Returns a ConstraintExpression by appending Or to the current constraint. |
| With |
Returns a ConstraintExpression by appending And to the current constraint. |
Methods
| After(Int32) | |
| After(Int32, Int32) | |
| GetStringRepresentation() | |
| Matches(Object) |
Test whether the constraint is satisfied by a given value |
| Matches<T>(ActualValueDelegate<T>) | |
| Matches<T>(T) | |
| ToString() |
Default override of ToString returns the constraint DisplayName followed by any arguments within angle brackets. |
| WriteActualValueTo(MessageWriter) |
Write the actual value for a failing constraint test to a MessageWriter. The default implementation simply writes the raw value of actual, leaving it to the writer to perform any formatting. |
| WriteDescriptionTo(MessageWriter) |
Write the constraint description to a MessageWriter |
| WriteMessageTo(MessageWriter) |
Write the failure message to the MessageWriter provided as an argument. The default implementation simply passes the constraint and the actual value to the writer, which then displays the constraint description and the value. Constraints that need to provide additional details, such as where the error occured can override this. |
Operators
| BitwiseAnd(Constraint, Constraint) |
This operator creates a constraint that is satisfied only if both argument constraints are satisfied. |
| BitwiseOr(Constraint, Constraint) |
This operator creates a constraint that is satisfied if either of the argument constraints is satisfied. |
| LogicalNot(Constraint) |
This operator creates a constraint that is satisfied if the argument constraint is not satisfied. |
Explicit Interface Implementations
| IResolveConstraint.Resolve() |