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class Hash
# Provides a set of helper methods for making assertions about the content
# of various objects
unless respond_to?(:assert_valid_keys)
# Validate all keys in a hash match <tt>*valid_keys</tt>, raising ArgumentError
# on a mismatch. Note that keys are NOT treated indifferently, meaning if you
# use strings for keys but assert symbols as keys, this will fail.
#
# { name: 'Rob', years: '28' }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key: :years. Valid keys are: :name, :age"
# { name: 'Rob', age: '28' }.assert_valid_keys('name', 'age') # => raises "ArgumentError: Unknown key: :name. Valid keys are: 'name', 'age'"
# { name: 'Rob', age: '28' }.assert_valid_keys(:name, :age) # => passes, raises nothing
# Code from ActiveSupport
def assert_valid_keys(*valid_keys)
valid_keys.flatten!
each_key do |k|
unless valid_keys.include?(k)
raise ArgumentError.new("Unknown key: #{k.inspect}. Valid keys are: #{valid_keys.map(&:inspect).join(', ')}")
end
end
end
end
# Validates that the given hash only includes at *most* one of a set of
# exclusive keys. If more than one key is found, an ArgumentError will be
# raised.
#
# == Examples
#
# options = {:only => :on, :except => :off}
# options.assert_exclusive_keys(:only) # => nil
# options.assert_exclusive_keys(:except) # => nil
# options.assert_exclusive_keys(:only, :except) # => ArgumentError: Conflicting keys: only, except
# options.assert_exclusive_keys(:only, :except, :with) # => ArgumentError: Conflicting keys: only, except
def assert_exclusive_keys(*exclusive_keys)
conflicting_keys = exclusive_keys & keys
raise ArgumentError, "Conflicting keys: #{conflicting_keys.join(', ')}" unless conflicting_keys.length <= 1
end
end
Version data entries
15 entries across 15 versions & 2 rubygems