assert_not(object, message = nil) public

Assert that an expression is not truthy. Passes if object is nil or false. “Truthy” means “considered true in a conditional” like if foo.

assert_not nil    # => true
assert_not false  # => true
assert_not 'foo'  # => Expected "foo" to be nil or false

An error message can be specified.

assert_not foo, 'foo should be false'
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