thoughtbot--shoulda-matchers/lib/shoulda/matchers/active_model/ensure_inclusion_of_matcher.rb

88 lines
2.2 KiB
Ruby

module Shoulda # :nodoc:
module Matchers
module ActiveModel # :nodoc:
# Ensure that the attribute's value is in the range specified
#
# Options:
# * <tt>in_range</tt> - the range of allowed values for this attribute
# * <tt>with_low_message</tt> - value the test expects to find in
# <tt>errors.on(:attribute)</tt>. Regexp or string. Defaults to the
# translation for :inclusion.
# * <tt>with_high_message</tt> - value the test expects to find in
# <tt>errors.on(:attribute)</tt>. Regexp or string. Defaults to the
# translation for :inclusion.
#
# Example:
# it { should ensure_inclusion_of(:age).in_range(0..100) }
#
def ensure_inclusion_of(attr)
EnsureInclusionOfMatcher.new(attr)
end
class EnsureInclusionOfMatcher < ValidationMatcher # :nodoc:
def in_range(range)
@range = range
@minimum = range.first
@maximum = range.last
self
end
def with_message(message)
if message
@low_message = message
@high_message = message
end
self
end
def with_low_message(message)
@low_message = message if message
self
end
def with_high_message(message)
@high_message = message if message
self
end
def description
"ensure inclusion of #{@attribute} in #{@range.inspect}"
end
def matches?(subject)
super(subject)
@low_message ||= :inclusion
@high_message ||= :inclusion
disallows_lower_value &&
allows_minimum_value &&
disallows_higher_value &&
allows_maximum_value
end
private
def disallows_lower_value
@minimum == 0 || disallows_value_of(@minimum - 1, @low_message)
end
def disallows_higher_value
disallows_value_of(@maximum + 1, @high_message)
end
def allows_minimum_value
allows_value_of(@minimum, @low_message)
end
def allows_maximum_value
allows_value_of(@maximum, @high_message)
end
end
end
end
end