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module Shoulda # :nodoc:
module Matchers
module ActiveModel # :nodoc:
# Ensures that the attribute can be set to the given value.
#
# Options:
# * <tt>with_message</tt> - value the test expects to find in
# <tt>errors.on(:attribute)</tt>. Regexp or string. If omitted,
# the test looks for any errors in <tt>errors.on(:attribute)</tt>.
#
# Example:
# it { should_not allow_value('bad').for(:isbn) }
# it { should allow_value("isbn 1 2345 6789 0").for(:isbn) }
#
def allow_value(value)
AllowValueMatcher.new(value)
end
class AllowValueMatcher # :nodoc:
include Helpers
def initialize(value)
@value = value
end
def for(attribute)
@attribute = attribute
self
end
def with_message(message)
@expected_message = message if message
self
end
def matches?(instance)
@instance = instance
if Symbol === @expected_message
@expected_message = default_error_message(@expected_message)
end
@instance.send("#{@attribute}=", @value)
!errors_match?
end
def failure_message
"Did not expect #{expectation}, got error: #{@matched_error}"
end
def negative_failure_message
"Expected #{expectation}, got #{error_description}"
end
def description
"allow #{@attribute} to be set to #{@value.inspect}"
end
private
def errors_match?
@instance.valid?
@errors = errors_for_attribute(@instance, @attribute)
@errors = [@errors] unless @errors.is_a?(Array)
@expected_message ? (errors_match_regexp? || errors_match_string?) : (@errors.compact.any?)
end
def errors_for_attribute(instance, attribute)
if instance.errors.respond_to?(:[])
instance.errors[attribute]
else
instance.errors.on(attribute)
end
end
def errors_match_regexp?
if Regexp === @expected_message
@matched_error = @errors.detect { |e| e =~ @expected_message }
!@matched_error.nil?
else
false
end
end
def errors_match_string?
if @errors.include?(@expected_message)
@matched_error = @expected_message
true
else
false
end
end
def expectation
"errors " <<
(@expected_message ? "to include #{@expected_message.inspect} " : "") <<
"when #{@attribute} is set to #{@value.inspect}"
end
def error_description
if @instance.errors.empty?
"no errors"
else
"errors: #{pretty_error_messages(@instance)}"
end
end
end
end
end
end
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