In RSpec, what does the matcher expect(value).to be_nil check for?

easy📝 Conceptual Q1 of 15

Ruby - Testing with RSpec and Minitest

In RSpec, what does the matcher expect(value).to be_nil check for?

AIt checks if <code>value</code> is false.

BIt checks if <code>value</code> is <code>nil</code>.

CIt checks if <code>value</code> is an empty string.

DIt checks if <code>value</code> is zero.

Step-by-Step Solution

Solution:

Step 1: Understand the be_nil matcher
The be_nil matcher checks if the tested value is exactly nil.
Step 2: Compare options with matcher behavior
Options A, B, and C describe checks for false, zero, and empty string respectively -- none of which match the be_nil behavior.
Final Answer:
It checks if value is nil. -> Option B
Quick Check:
Matcher be_nil = check for nil [OK]

Quick Trick: Use be_nil to check for nil values only [OK]

Common Mistakes:

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