ParameterChecker Delegate

Typemock Isolator Developer Guide

This might become Obsolete, please use ParameterCheckerEx. Delegate to implement a custom parameter checker

Namespace: TypeMock
Assembly: TypeMock (in TypeMock.dll) Version: 9.3.6.0 (9.3.6.0)

Syntax

public delegate bool ParameterChecker(
	Object parameter
)

Public Delegate Function ParameterChecker ( 
	parameter As Object
) As Boolean

Parameters

parameter: Type: SystemObject
The real parameter value that was passed to the mocked method

Return Value

Type: Boolean
True for parameter values that are expected

Remarks

Typemock Isolator validates parameter values, collections and arrays automatically there are some cases where this is not enough and a custom checker is needed, to do so create a check delegation and pass it as a parameter to Args see IParameters and Mock

Examples

For example, if we need to check that an int parameter is larger then 10 we can write the following code

Copy

public static bool CheckRange(object parameter)
{
    return (int)parameter > 10;
}

Public Shared Function CheckRange(ByVal parameter As Object) As Boolean
    CheckRange = parameter > 10;
End Function

We can then use it in out test

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[Test]
public void Test()
{
    TestedClass t = new TestedClass();
    // Start mocking TestedClass
    Mock mock = MockManager.Mock(typeof(TestedClass));
    // passInt will be called, arguments must agree with MyChecker
    mock.ExpectAlways("passInt").Args(new ParameterChecker(CheckRange));
    // This will pass 
    t.passInt(16);
    // This will fail 
    t.passInt(3);
    MockManager.Verify();
}

<Test()> _
Public Sub Test()
    Dim t As TestedClass = new TestedClass
    ' Start mocking TestedClass
    Dim mock As Mock = MockManager.Mock(GetType(TestedClass))
    ' passInt will be called, arguments must agree with MyChecker
    mock.ExpectAlways("passInt").Args(New ParameterChecker(AddressOf CheckRange))
    // This will pass 
    t.passInt(16)
    // This will fail 
    t.passInt(3)
    MockManager.Verify()
End Sub

See Check for built in ParameterCheckers

Reference

TypeMock Namespace

TypeMockCheck

TypeMockIParameters