How to Fix: Mockito test a void method throws an exception
Fix Mockito test a void method throws an exception. Use the `doThrow` method on a stubbed ob. Step-by-step guide included.
📋 Table of Contents
You are getting this error because Mockito's `when` method does not support stubbing void methods directly. This is due to the fact that a void method cannot return a value, so there is no way for Mockito to verify if the method was called or not.
🛠️ Step-by-Step Verified Fixes
Method 1: Use a Void Method That Throws an Exception
- Step 1: Create a void method that throws the exception you want to test for.
Method 2: Use Mockito's `whenThrowing` Method
- Step 1: Create a stubber for the method you want to test.
- Step 2: Use Mockito's `whenThrowing` method to specify the exception that should be thrown.
✨ Wrapping Up
By following these steps, you can successfully test if a void method throws an exception using Mockito.
❓ Frequently Asked Questions
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