RSpec claims nil to be false

Arne Hartherz

June 29, 2012Software engineer at makandra GmbH

RSpec's be_false behaves unexpectedly:

nil.should be_false
# passes, as the expectation returns true

Illustration online protection

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

Prevents you from data breaches and liability risks
Upgrade at your own pace
Works with modern Rubies

Read more Show archive.org snapshot

If you want to check for false, you need to do it like this:

nil.should == false
# fails as expected

Wat? Show archive.org snapshot

See also

RSpec: be_true does not actually check if a value is true

License for source code

Posted by Arne Hartherz to makandra dev (2012-06-29 12:19)