Fluent Assertions Documentation
FluentAssertions Assembly / FluentAssertions Namespace / AssertionExtensions Class
In This Topic
    AssertionExtensions Class
    In This Topic
    Contains extension methods for custom assertions in unit tests.
    Object Model
    AssertionExtensions ClassExecutionTime ClassExecutionTimeAssertions Class
    Syntax
    [Extension()]
    [DebuggerNonUserCode()]
    public static class AssertionExtensions 
    Inheritance Hierarchy

    System.Object
       FluentAssertions.AssertionExtensions

    Public Methods
     NameDescription
    Public Methodstatic (Shared in Visual Basic)Safely casts the specified object to the type specified through TTo.  
    Public Methodstatic (Shared in Visual Basic)Overloaded. Invokes the specified action on a subject so that you can chain it with any of the assertions from FluentAssertions.Specialized.NonGenericAsyncFunctionAssertions  
    Public Methodstatic (Shared in Visual Basic)Overloaded. Forces enumerating a collection. Should be used to assert that a method that uses the yield keyword throws a particular exception.  
    Public Methodstatic (Shared in Visual Basic)Overloaded.  Provides methods for asserting the execution time of an action.  
    Public Methodstatic (Shared in Visual Basic) Provides methods for asserting the execution time of a method or property.  
    Public Methodstatic (Shared in Visual Basic)Overloaded. Invokes the specified action on a subject so that you can chain it with any of the assertions from FluentAssertions.Specialized.ActionAssertions  
    Public Methodstatic (Shared in Visual Basic)Overloaded. Starts monitoring eventSource for its events.  
    Public Methodstatic (Shared in Visual Basic)Overloaded. Returns an FluentAssertions.Specialized.ExecutionTimeAssertions object that can be used to assert the current FluentAssertions.Specialized.ExecutionTime.  
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    Extension Methods
     NameDescription
    Public Extension MethodOverloaded. Returns an FluentAssertions.Primitives.EnumAssertions<TEnum,TAssertions> object that can be used to assert the current TEnum.
    Public Extension MethodOverloaded. Returns an object that provides various assertion APIs that act on a System.Text.Json.Nodes.JsonNode.
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    Supported Frameworks

    .NET: net5.0, net5.0-windows, net6.0, net6.0-macos, net6.0-windows, net7.0, net7.0-macos, net7.0-windows, net8.0, net8.0-browser, net8.0-macos, net8.0-windows, net9.0, net9.0-browser, net9.0-macos, net9.0-windows, net10.0, net10.0-browser, net10.0-macos, net10.0-windows.

    .NET Standard: netstandard2.0, netstandard2.1.

    .NET Framework: net40, net403, net45, net451, net452, net46, net461, net462, net463, net47, net471, net472, net48, net481.

    See Also