Mock getResourceAsStream( ) method

Question

I have a method call like this

class classname
    {
    void somemethod()
    {
    InpuStream someImputStream=classname.class.getResourceAsStream("some string");
    }
    }

Is there any way to mock the method call?

Thanks

Answer 1

You can first introduce a method for returning the input stream

 class classname
        {
        void somemethod()
        {
           InpuStream someImputStream = getInputStream();
        }

        protected InputStream getInputStream() {
            return classname.class.getResourceAsStream("some string");
        }


        }

In your test case

classname testObject = org.mockito.Mockito.spy(new classname());
org.mockito.Mockito.when(testObject.getInputStream()).thenReturn(...);