How to mock method call and return value without running the method?

Question

Consider the following method:

public boolean isACertainValue() {
        if(context.getValueA() != null && context.getValueA().toBoolean() == true) {
           


        

Answer 1

This code is correct:

Mockito.when(contextMock.getType()).thenReturn(ContextType.certainType);

But you are getting NullPointerException because you didn't define the Mocking value that should be defines, well I'm using Spring, in my context file when I define @Autowired bean I define it this way: