Is(TValue) Method

Matches any value that satisfies the given predicate.

Namespace: Moq.Protected
Assembly: Moq (in Moq.dll) Version: 2.6.1014.1 (2.6.0.0)

Syntax

C#
public static Expression Is<TValue>( Expression<Predicate<TValue>> match )

match: Type: Expression<(Of <(Predicate<(Of <(TValue>)>)>)>)
The predicate used to match the method argument.

Allows the specification of a predicate to perform matching of method call arguments.

This example shows how to return the value 1 whenever the argument to the Do method is an even number.

CopyC#

mock.Protected()
    .Expect("Do", ItExpr.Is<int>(i => i % 2 == 0))
    .Returns(1);

This example shows how to throw an exception if the argument to the method is a negative number:

CopyC#

mock.Protected()
    .Expect("GetUser", ItExpr.Is<int>(i => i < 0))
    .Throws(new ArgumentException());