Class Is

Namespace

NUnit.Framework

Assembly

nunit.framework.dll

Helper class with properties and methods that supply a number of constraints used in Asserts.

public abstract class Is

Inheritance

object

Is

Derived

Iz

Inherited Members

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Constructors

Is()

protected Is()

Properties

All

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

public static ConstraintExpression All { get; }

Property Value

ConstraintExpression

Default

Returns a constraint that tests for default value

public static DefaultConstraint Default { get; }

Property Value

DefaultConstraint

Empty

Returns a constraint that tests for empty

public static EmptyConstraint Empty { get; }

Property Value

EmptyConstraint

False

Returns a constraint that tests for False

public static FalseConstraint False { get; }

Property Value

FalseConstraint

NaN

Returns a constraint that tests for NaN

public static NaNConstraint NaN { get; }

Property Value

NaNConstraint

Negative

Returns a constraint that tests for a negative value

public static LessThanConstraint Negative { get; }

Property Value

LessThanConstraint

Not

Returns a ConstraintExpression that negates any following constraint.

public static ConstraintExpression Not { get; }

Property Value

ConstraintExpression

Null

Returns a constraint that tests for null

public static NullConstraint Null { get; }

Property Value

NullConstraint

Ordered

Returns a constraint that tests whether a collection is ordered

public static CollectionOrderedConstraint Ordered { get; }

Property Value

CollectionOrderedConstraint

Positive

Returns a constraint that tests for a positive value

public static GreaterThanConstraint Positive { get; }

Property Value

GreaterThanConstraint

True

Returns a constraint that tests for True

public static TrueConstraint True { get; }

Property Value

TrueConstraint

Unique

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

public static UniqueItemsConstraint Unique { get; }

Property Value

UniqueItemsConstraint

XmlSerializable

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

public static XmlSerializableConstraint XmlSerializable { get; }

Property Value

XmlSerializableConstraint

Zero

Returns a constraint that tests for equality with zero

public static EqualConstraint Zero { get; }

Property Value

EqualConstraint

Methods

AnyOf(ICollection)

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

public static AnyOfConstraint AnyOf(ICollection expected)

Parameters

expected ICollection

Expected values

Returns

AnyOfConstraint

AnyOf(params object?[]?)

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

public static AnyOfConstraint AnyOf(params object?[]? expected)

Parameters

expected object[]

Expected values

Returns

AnyOfConstraint

AssignableFrom(Type)

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

public static AssignableFromConstraint AssignableFrom(Type expectedType)

Parameters

expectedType Type

Returns

AssignableFromConstraint

AssignableFrom<TExpected>()

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

public static AssignableFromConstraint AssignableFrom<TExpected>()

Returns

AssignableFromConstraint

Type Parameters

TExpected

AssignableTo(Type)

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

public static AssignableToConstraint AssignableTo(Type expectedType)

Parameters

expectedType Type

Returns

AssignableToConstraint

AssignableTo<TExpected>()

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

public static AssignableToConstraint AssignableTo<TExpected>()

Returns

AssignableToConstraint

Type Parameters

TExpected

AtLeast(object)

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

public static GreaterThanOrEqualConstraint AtLeast(object expected)

Parameters

expected object

Returns

GreaterThanOrEqualConstraint

AtMost(object)

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

public static LessThanOrEqualConstraint AtMost(object expected)

Parameters

expected object

Returns

LessThanOrEqualConstraint

EqualTo(object?)

Returns a constraint that tests two items for equality

public static EqualConstraint EqualTo(object? expected)

Parameters

expected object

Returns

EqualConstraint

EquivalentTo(IEnumerable)

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

public static CollectionEquivalentConstraint EquivalentTo(IEnumerable expected)

Parameters

expected IEnumerable

Returns

CollectionEquivalentConstraint

GreaterThan(object)

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

public static GreaterThanConstraint GreaterThan(object expected)

Parameters

expected object

Returns

GreaterThanConstraint

GreaterThanOrEqualTo(object)

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

public static GreaterThanOrEqualConstraint GreaterThanOrEqualTo(object expected)

Parameters

expected object

Returns

GreaterThanOrEqualConstraint

InRange(object, object)

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

public static RangeConstraint InRange(object from, object to)

Parameters

from object

Inclusive beginning of the range.

to object

Inclusive end of the range.

Returns

RangeConstraint

InstanceOf(Type)

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

public static InstanceOfTypeConstraint InstanceOf(Type expectedType)

Parameters

expectedType Type

Returns

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 static InstanceOfTypeConstraint InstanceOf<TExpected>()

Returns

InstanceOfTypeConstraint

Type Parameters

TExpected

LessThan(object)

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

public static LessThanConstraint LessThan(object expected)

Parameters

expected object

Returns

LessThanConstraint

LessThanOrEqualTo(object)

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

public static LessThanOrEqualConstraint LessThanOrEqualTo(object expected)

Parameters

expected object

Returns

LessThanOrEqualConstraint

SameAs(object?)

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

public static SameAsConstraint SameAs(object? expected)

Parameters

expected object

Returns

SameAsConstraint

SamePath(string)

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

public static SamePathConstraint SamePath(string expected)

Parameters

expected string

Returns

SamePathConstraint

SamePathOrUnder(string)

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

public static SamePathOrUnderConstraint SamePathOrUnder(string expected)

Parameters

expected string

Returns

SamePathOrUnderConstraint

SubPathOf(string)

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

public static SubPathConstraint SubPathOf(string expected)

Parameters

expected string

Returns

SubPathConstraint

SubsetOf(IEnumerable)

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

public static CollectionSubsetConstraint SubsetOf(IEnumerable expected)

Parameters

expected IEnumerable

Returns

CollectionSubsetConstraint

SupersetOf(IEnumerable)

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

public static CollectionSupersetConstraint SupersetOf(IEnumerable expected)

Parameters

expected IEnumerable

Returns

CollectionSupersetConstraint

TypeOf(Type)

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

public static ExactTypeConstraint TypeOf(Type expectedType)

Parameters

expectedType Type

Returns

ExactTypeConstraint

TypeOf<TExpected>()

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

public static ExactTypeConstraint TypeOf<TExpected>()

Returns

ExactTypeConstraint

Type Parameters

TExpected