PropertyExistsConstraint Class

Summary

PropertyExistsConstraint tests that a named property exists on the object provided through Match. Originally, PropertyConstraint provided this feature in addition to making optional tests on the value of the property. The two constraints are now separate.
Namespace
TCLite.Constraints
Interfaces
Base Types
graph BT Type-->Base0["Constraint"] click Base0 "/tc-lite/api/TCLite.Constraints/Constraint" Base0-->Base1["object"] Type-.->Interface0["IConstraint"] click Interface0 "/tc-lite/api/TCLite.Constraints/IConstraint" Type-.->Interface1["IResolveConstraint"] click Interface1 "/tc-lite/api/TCLite.Constraints/IResolveConstraint" Type["PropertyExistsConstraint"] class Type type-node

Syntax

public class PropertyExistsConstraint : Constraint, IConstraint, IResolveConstraint

Constructors

Name Summary
PropertyExistsConstraint(string) Initializes a new instance of the PropertyExistsConstraint class.

Properties

Name Value Summary
And ConstraintExpression
Returns a ConstraintExpression by appending And to the current constraint.
Inherited from Constraint
Arguments object[]
Arguments provided to this Constraint, for use in formatting the description.
Inherited from Constraint
Builder ConstraintBuilder
A ConstraintBuilder holding this constraint. If not null the constraint is under construction.
Inherited from Constraint
Description string
The Description of what this constraint tests, for use in messages and in the ConstraintResult.
DisplayName string
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.
Inherited from Constraint
Or ConstraintExpression
Returns a ConstraintExpression by appending Or to the current constraint.
Inherited from Constraint
With ConstraintExpression
Returns a ConstraintExpression by appending And to the current constraint.
Inherited from Constraint

Methods

Name Value Summary
ApplyConstraint<T>(ActualValueDelegate<T>) ConstraintResult
Applies the constraint to an ActualValueDelegate that returns the value to be tested. The default implementation simply evaluates the delegate but derived classes may override it to provide for delayed processing.
Inherited from Constraint
ApplyConstraint<T>(T) ConstraintResult
Test whether the property exists for a given object
ApplyConstraint<T>(T) ConstraintResult
Test whether the constraint is satisfied by a given reference. The default implementation simply dereferences the value but derived classes may override it to provide for delayed processing.
Inherited from Constraint
ApplyTo<T>(ActualValueDelegate<T>) ConstraintResult
Validates the ActualValueDelegate and applies the constraint to the value it returns.
Inherited from Constraint
ApplyTo<T>(T) ConstraintResult
Validates the actual value argument and applies the constraint to it, returning a ConstraintResult.
Inherited from Constraint
ApplyTo<T>(T) ConstraintResult
Validates the actual value argument and applies the constraint to it, returning a ConstraintResult.
Inherited from Constraint
GetStringRepresentation() string
Returns the string representation of the constraint.
ToString() string
Default override of ToString returns the constraint DisplayName followed by any arguments within angle brackets.
Inherited from Constraint
ValidateActualValue(object) void
Validate the actual value argument based on what the particular constraint allows. The default implementation does nothing, implying that the constraint can handle any Type as well as null values.
Inherited from Constraint