Ensure arg is not valid

assert_not  arg (anything)

Raises an exception if the argument is not either nil or false.

Introduced in v3.3

Examples

# Example 1


assert_not false  
assert_not nil    
assert_not 1 == 5 
assert true

# Simple assertions
# As false is either nil or false, this assertion passes
# As nil is either nil or false, this assertion passes
# These numbers are not equal
# This will raise an exception

# Example 2


assert_not true , "oops"

# Communicating error messages
# This will raise an exception containing the message "oops"