[Solved] Identify the error in this RSpec mocking code: user = double('User') expect(user).to receive(:login).with('admin') user.login('guest') | Ruby

Ruby - Testing with RSpec and Minitest

Identify the error in this RSpec mocking code:

user = double('User')
expect(user).to receive(:login).with('admin')
user.login('guest')

AMissing stub for login method

BThe double is not created correctly

CThe method login is called with wrong argument

DNo error, code is correct

Step-by-Step Solution

Solution:

Step 1: Understand the expectation
The test expects login to be called with argument 'admin'.
Step 2: Check actual method call
The method is called with 'guest', which does not match the expectation.
Final Answer:
The method login is called with wrong argument -> Option C
Quick Check:
Expect argument mismatch causes failure [OK]

Quick Trick: Match expected arguments exactly in mocks [OK]

Common Mistakes:

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