TestDouble

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TestDouble class

Implements an easy and re-usable StubProvider Utilizes a fluent interface for ease of use. This is merly an example of how you could build a reusable stub provider class. There are definitely edge cases or features not handled by this class. The general mechanism for use looks like this: apex TestDouble stub = new TestDouble(SomeClass.class); TestDouble.Method methodToTrack = new TestDouble.Method('methodName') .returning(someObject); stub.track(methodToTrack); ConsumingClass consumer = new ConsumingClass( (someClass) stub.generate() );

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Constructors

TestDouble(Type objectType)

Constructor requiring the Type parameter to ensure we always set the Type property.

Parameters

Param	Description
objectType	Type name. ie: TestDouble.class

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Methods

generate() → Object

Generates the actual stub object for use in tests.

Return

Type

Object

Description

Object This object has to be casted back to the

handleCall() → Object

handleMethodCall(Object stubbedObject,String stubbedMethodName,Type returnType,List<System.Type> listOfParamTypes,List<String> listOfParamNames,List<Object> listOfArgs) → Object

Required method for the StubProvider interface This extensive parameter list is used to help disambiguate overloaded method names where needed. This method is used to delegate response to appropriate Method object - matched by name and params.

Parameters

Param	Description
stubbedObject	- This is the object being stubbed
stubbedMethodName	- This is the name of the Method being stubbed
returnType	- Return type
listOfParamTypes	- List of parameter types
listOfParamNames	- List of parameter names
listOfArgs	- List of parameter values

Return

Type

Object

Description

Object Object to be returned by the Method

returning(Object returnValue) → Method

throwing(String exceptionMessage) → Method

track(Method toTrack) → TestDouble

This adds a given method object to the list of Methods that are actively overridden and stubbed by this TestDouble instance.

Parameters

Param	Description
toTrack	A TestDouble.Method object

Return

Type

TestDouble

Description

TestDouble

withArgs(List<Object> args) → Method

withParamNames(List<String> paramNames) → Method

withParamTypes(List<Type> paramTypes) → Method

Adds a matching ParamTypes list to this method definition. If added,

Parameters

Param	Description
``	s

Return

Type

Method

Description

Method

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Inner Classes

TestDouble.Method class

I'm not normally a fan of such complex if statements, but doing it this way allows us to disambiguate overloaded methods. /** This inner class describes a Method that is to be stubbed. Multiple Method objects will likely be created in the course of your unit tests, and these Method objects are added to the methods property of your TestDouble instance.

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Constructors

Method(String methodName)

Minimalist constructor for this class.

Parameters

Param	Description
methodName	the name of the method to be stubbed.

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Properties

hasBeenCalledXTimes → Integer

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TestDouble.TestDoubleException class

Internal exception class.

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