Mocking with Factory Methods

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Mocking with Factory Methods

Estimated reading time: 1 min

In this tutorial we learn how to use factory methods in Devmate UTST for mocking with a simple code example.

The class to test MockDemo has a field of the interface IDemo. We want to test the method MethodToTest which uses the method getInt of IDemo.

Without an implementation of IDemo we need to mock it. We start devmate normally and create an instance of MockDemo.

Code example of ClassToTest — The class to test MockDemo

Code example of interface for the tested class — Interface to the field of MockDemo

As an interface IDemo cannot be instantiated so we use a factory method instead(image createFactory) (useFactory)

Creating a factory method in Devmate — Creating the factory method

Using a factory method in Devmate — Using the factory method

When we are finished with creating the representants and tests, we can generate the code .

Generate code with factory methods in Devmate — Generating the code

The code is generated without an implementation of the factory method and needs to be edited. We need to create a new mock object of type IDemo and tell it in the setup what it should return when the getInt method is called.