<PackageReference Include="NUnit" Version="4.3.2" />

ConstraintExpression

public class ConstraintExpression
ConstraintExpression represents a compound constraint in the process of being constructed from a series of syntactic elements. Individual elements are appended to the expression as they are reorganized. When a constraint is appended, it is returned as the value of the operation so that modifiers may be applied. However, any partially built expression is attached to the constraint for later resolution. When an operator is appended, the partial expression is returned. If it's a self-resolving operator, then a ResolvableConstraintExpression is returned.
protected readonly ConstraintBuilder builder

The ConstraintBuilder holding the elements recognized so far

public ConstraintExpression All { get; }

Returns a ConstraintExpression, which will apply the following constraint to all members of a collection, succeeding if all of them succeed.

public ResolvableConstraintExpression Count { get; }

Returns a new ConstraintExpression, which will apply the following constraint to the Count property of the object being tested.

public DefaultConstraint Default { get; }

Returns a constraint that tests for default value

public EmptyConstraint Empty { get; }

Returns a constraint that tests for empty

public Constraint Exist { get; }

Returns a constraint that succeeds if the value is a file or directory and it exists.

public FalseConstraint False { get; }

Returns a constraint that tests for False

public ResolvableConstraintExpression InnerException { get; }

Returns a new ConstraintExpression, which will apply the following constraint to the InnerException property of the object being tested.

public ResolvableConstraintExpression Length { get; }

Returns a new ConstraintExpression, which will apply the following constraint to the Length property of the object being tested.

public ResolvableConstraintExpression Message { get; }

Returns a new ConstraintExpression, which will apply the following constraint to the Message property of the object being tested.

public NaNConstraint NaN { get; }

Returns a constraint that tests for NaN

public LessThanConstraint Negative { get; }

Returns a constraint that tests for a negative value

public ConstraintExpression No { get; }

Returns a ConstraintExpression that negates any following constraint.

public ConstraintExpression None { get; }

Returns a ConstraintExpression, which will apply the following constraint to all members of a collection, succeeding if all of them fail.

public ConstraintExpression Not { get; }

Returns a ConstraintExpression that negates any following constraint.

public NullConstraint Null { get; }

Returns a constraint that tests for null

public ItemsConstraintExpression One { get; }

Returns a ItemsConstraintExpression, which will apply the following constraint to a collection of length one, succeeding only if exactly one of them succeeds.

public CollectionOrderedConstraint Ordered { get; }

Returns a constraint that tests whether a collection is ordered

public GreaterThanConstraint Positive { get; }

Returns a constraint that tests for a positive value

public ConstraintExpression Some { get; }

Returns a ConstraintExpression, which will apply the following constraint to all members of a collection, succeeding if at least one of them succeeds.

public TrueConstraint True { get; }

Returns a constraint that tests for True

public UniqueItemsConstraint Unique { get; }

Returns a constraint that tests whether a collection contains all unique items.

public WhiteSpaceConstraint WhiteSpace { get; }

Returns a constraint that tests for white-space

public ConstraintExpression With { get; }

With is currently a NOP - reserved for future use.

public XmlSerializableConstraint XmlSerializable { get; }

Returns a constraint that tests whether an object graph is serializable in XML format.

public EqualConstraint Zero { get; }

Returns a constraint that tests if item is equal to zero

public ConstraintExpression()

Initializes a new instance of the ConstraintExpression class.

public ConstraintExpression(ConstraintBuilder builder)

Initializes a new instance of the ConstraintExpression class passing in a ConstraintBuilder, which may be pre-populated.

public AnyOfConstraint AnyOf(object[] expected)

Returns a constraint that tests if an item is equal to any of parameters

public AnyOfConstraint AnyOf(ICollection expected)

Returns a constraint that tests if an item is equal to any of expected values

public ConstraintExpression Append(ConstraintOperator op)

Appends an operator to the expression and returns the resulting expression itself.

public ResolvableConstraintExpression Append(SelfResolvingOperator op)

Appends a self-resolving operator to the expression and returns a new ResolvableConstraintExpression.

public Constraint Append(Constraint constraint)

Appends a constraint to the expression and returns that constraint, which is associated with the current state of the expression being built. Note that the constraint is not reduced at this time. For example, if there is a NotOperator on the stack we don't reduce and return a NotConstraint. The original constraint must be returned because it may support modifiers that are yet to be applied.

public T Append<T>(T constraint) where T : Constraint

Appends a constraint to the expression and returns that constraint, which is associated with the current state of the expression being built. Note that the constraint is not reduced at this time. For example, if there is a NotOperator on the stack we don't reduce and return a NotConstraint. The original constraint must be returned because it may support modifiers that are yet to be applied.

public AssignableFromConstraint AssignableFrom(Type expectedType)

Returns a constraint that tests whether the actual value is assignable from the type supplied as an argument.

public AssignableFromConstraint AssignableFrom<TExpected>()

Returns a constraint that tests whether the actual value is assignable from the type supplied as an argument.

public AssignableToConstraint AssignableTo(Type expectedType)

Returns a constraint that tests whether the actual value is assignable from the type supplied as an argument.

public AssignableToConstraint AssignableTo<TExpected>()

Returns a constraint that tests whether the actual value is assignable from the type supplied as an argument.

public GreaterThanOrEqualConstraint AtLeast(object expected)

Returns a constraint that tests whether the actual value is greater than or equal to the supplied argument

public LessThanOrEqualConstraint AtMost(object expected)

Returns a constraint that tests whether the actual value is less than or equal to the supplied argument

public ResolvableConstraintExpression Attribute(Type expectedType)

Returns a new AttributeConstraint checking for the presence of a particular attribute on an object.

public ResolvableConstraintExpression Attribute<TExpected>()

Returns a new AttributeConstraint checking for the presence of a particular attribute on an object.

public SomeItemsConstraint Contain(object expected)

Returns a new SomeItemsConstraint checking for the presence of a particular object in the collection.

public ContainsConstraint Contain(string expected)

Returns a new ContainsConstraint. This constraint will, in turn, make use of the appropriate second-level constraint, depending on the type of the actual argument. This overload is only used if the item sought is a string, since any other type implies that we are looking for a collection member.

public DictionaryContainsKeyConstraint ContainKey(object expected)

Returns a new DictionaryContainsKeyConstraint checking for the presence of a particular key in the Dictionary key collection.

public SomeItemsConstraint Contains(object expected)

Returns a new SomeItemsConstraint checking for the presence of a particular object in the collection.

To search for a substring instead of a collection element, use the Contains overload.

public ContainsConstraint Contains(string expected)

Returns a new ContainsConstraint. This constraint will, in turn, make use of the appropriate second-level constraint, depending on the type of the actual argument.

To search for a collection element instead of a substring, use the Contains overload.

public DictionaryContainsValueConstraint ContainValue(object expected)

Returns a new DictionaryContainsValueConstraint checking for the presence of a particular value in the Dictionary value collection.

public EndsWithConstraint EndsWith(string expected)

Returns a constraint that succeeds if the actual value ends with the substring supplied as an argument.

public EndsWithConstraint EndWith(string expected)

Returns a constraint that succeeds if the actual value ends with the substring supplied as an argument.

public EqualConstraint EqualTo(object expected)

Returns a constraint that tests two items for equality

public EqualConstraint EqualTo<T>(T expected)

Returns a constraint that tests two items for equality

public EqualStringConstraint EqualTo(string expected)

Returns a constraint that tests two strings for equality

public EqualDateTimeOffsetConstraint EqualTo(DateTimeOffset expected)

Returns a constraint that tests two date time offset instances for equality

public EqualTimeBaseConstraint<DateTime> EqualTo(DateTime expected)

Returns a constraint that tests two date time instances for equality

public EqualTimeBaseConstraint<TimeSpan> EqualTo(TimeSpan expected)

Returns a constraint that tests two timespan instances for equality

public EqualNumericConstraint<double> EqualTo(double expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<float> EqualTo(float expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<decimal> EqualTo(decimal expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<long> EqualTo(long expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<int> EqualTo(int expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<short> EqualTo(short expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<byte> EqualTo(byte expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<ulong> EqualTo(ulong expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<uint> EqualTo(uint expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<ushort> EqualTo(ushort expected)

Returns a constraint that tests two numbers for equality

public EqualNumericConstraint<sbyte> EqualTo(sbyte expected)

Returns a constraint that tests two numbers for equality

public CollectionEquivalentConstraint EquivalentTo(IEnumerable expected)

Returns a constraint that tests whether the actual value is a collection containing the same elements as the collection supplied as an argument.

public ItemsConstraintExpression Exactly(int expectedCount)

Returns a ConstraintExpression, which will apply the following constraint to all members of a collection, succeeding only if a specified number of them succeed.

public GreaterThanConstraint GreaterThan(object expected)

Returns a constraint that tests whether the actual value is greater than the supplied argument

public GreaterThanOrEqualConstraint GreaterThanOrEqualTo(object expected)

Returns a constraint that tests whether the actual value is greater than or equal to the supplied argument

public RangeConstraint InRange(object from, object to)

Returns a constraint that tests whether the actual value falls inclusively within a specified range.

public InstanceOfTypeConstraint InstanceOf(Type expectedType)

Returns a constraint that tests whether the actual value is of the type supplied as an argument or a derived type.

public InstanceOfTypeConstraint InstanceOf<TExpected>()

Returns a constraint that tests whether the actual value is of the type supplied as an argument or a derived type.

public ConstraintExpression ItemAt(object[] indexArgs)

Returns a new IndexerConstraintExpression, which will apply any following constraint to that indexer value.

public LessThanConstraint LessThan(object expected)

Returns a constraint that tests whether the actual value is less than the supplied argument

public LessThanOrEqualConstraint LessThanOrEqualTo(object expected)

Returns a constraint that tests whether the actual value is less than or equal to the supplied argument

public RegexConstraint Match(string pattern)

Returns a constraint that succeeds if the actual value matches the regular expression supplied as an argument.

public RegexConstraint Match(Regex regex)

Returns a constraint that succeeds if the actual value matches the regular expression supplied as an argument.

public Constraint Matches(IResolveConstraint constraint)

Returns the constraint provided as an argument - used to allow custom custom constraints to easily participate in the syntax.

public Constraint Matches<TActual>(Predicate<TActual> predicate)

Returns the constraint provided as an argument - used to allow custom custom constraints to easily participate in the syntax.

public RegexConstraint Matches(string pattern)

Returns a constraint that succeeds if the actual value matches the regular expression supplied as an argument.

public RegexConstraint Matches(Regex regex)

Returns a constraint that succeeds if the actual value matches the regular expression supplied as an argument.

public SomeItemsConstraint Member(object expected)

Returns a new SomeItemsConstraint checking for the presence of a particular object in the collection.

public ResolvableConstraintExpression Property(string name)

Returns a new PropertyConstraintExpression, which will either test for the existence of the named property on the object being tested or apply any following constraint to that property.

public SameAsConstraint SameAs(object expected)

Returns a constraint that tests that two references are the same object

public SamePathConstraint SamePath(string expected)

Returns a constraint that tests whether the path provided is the same as an expected path after canonicalization.

public SamePathOrUnderConstraint SamePathOrUnder(string expected)

Returns a constraint that tests whether the path provided is the same path or under an expected path after canonicalization.

public StartsWithConstraint StartsWith(string expected)

Returns a constraint that succeeds if the actual value starts with the substring supplied as an argument.

public StartsWithConstraint StartWith(string expected)

Returns a constraint that succeeds if the actual value starts with the substring supplied as an argument.

public SubPathConstraint SubPathOf(string expected)

Returns a constraint that tests whether the path provided is the a subpath of the expected path after canonicalization.

public CollectionSubsetConstraint SubsetOf(IEnumerable expected)

Returns a constraint that tests whether the actual value is a subset of the collection supplied as an argument.

public CollectionSupersetConstraint SupersetOf(IEnumerable expected)

Returns a constraint that tests whether the actual value is a superset of the collection supplied as an argument.

public ExactTypeConstraint TypeOf(Type expectedType)

Returns a constraint that tests whether the actual value is of the exact type supplied as an argument.

public ExactTypeConstraint TypeOf<TExpected>()

Returns a constraint that tests whether the actual value is of the exact type supplied as an argument.